Establishment and validation of a model for predicting recurrent wheezing in children with bronchiolitis / 中国医师进修杂志

Objective:To analyze the risk factors of recurrent wheezing in children with bronchiolitis and to construct a predictive model.Methods:Prospective research methods was used. One hundred and eighty children with bronchiolitis who were treated in Hefei Eighth People's Hospital from February 2017 to February 2019 were selected as the study subjects, and the included children were separated into a modeling group (126 cases) and a validation group (54 cases) according to 7∶3. The children were followed up for 3 years, and then the modeling group was divided into wheezing group (48 cases) and no wheezing group (78 cases) according to whether the children had recurrent wheezing. The Hosmer-Lemeshow fitting curve and receiver operating characteristic (ROC) curve were drawn to evaluate the validity and accuracy of the constructed prediction model.Results:Multivariate Logistic regression analysis showed that artificial feeding ( OR = 8.838, 95% CI 2.601 to 30.027), family history of allergies ( OR = 6.709, 95% CI 1.825 to 24.665), underlying diseases ( OR = 8.114, 95% CI 1.638 to 40.184), and higher IgE level ( OR = 1.020, 95% CI 1.012 to 1.029) were the independent risk factors for recurrent wheezing in children with bronchiolitis ( P<0.05). The area under the curve of the modeling group was 0.917 (95% CI 0.855 to 0.959), and the sensitivity and specificity were 83.33% and 85.90%, respectively; the area under the curve of the validation group was 0.911 (95% CI 0.847 to 0.954), and the sensitivity and specificity were 89.58% and 79.49%, respectively. Conclusions:Artificial feeding, family history of allergies, underlying diseases, and higher IgE level are the independent risk factors for recurrent wheezing in children with bronchiolitis. The constructed prediction model has good accuracy and validity, and can be used as an effective tool for clinical prediction of recurrent wheezing in children with bronchiolitis.

Sibilancia recurrente en pediatría

Introducción: los episodios de obstrucción bronquial a temprana edad constituyen un problema frecuente en pediatría. Se realizó un estudio descriptivo, longitudinal, retrospectivo. Objetivo: caracterizar el comportamiento de la sibilancia recurrente en los niños menores de 5 años pertenecientes al municipio Bayamo, del Hospital Provincial Pediátrico Docente "General Milanés "en el año 2019. Métodos: la muestra fue de 63 pacientes y se estudiaron las variables edad, sexo, lactancia materna, ingresos previos, procedencia, género de vida y posibles factores de riesgo. El análisis estadístico se realizó a través de las estimaciones de las frecuencias absolutas y relativas. Resultados: predominaron los niños de 1 a 5 años con 52 casos (82.6%) y el sexo masculino, 29 de ellos pertenecieron a este grupo etáreo ( 80.6%); los ingresos previos de menos de 3 días en 37 casos (66.1%) y 56 casos no recibieron lactancia materna exclusiva, 37 de ellos representó el 66.1%; 44 casos tuvieron un género de vida malo ( 69.8%) y de los 43 casos que procedían de la zona urbana 28 pertenecían a ese género de vida(65.1%); los antecedentes patológicos familiares de alergia o asma y la atopia fueron los más significativos con 63 y 52 casos(100 y 82.5%) respectivamente. Conclusiones: se comprobó que la edad de 1 a 5 años, el sexo masculino, los ingresos de menos de tres días, sin lactancia materna , el género de vida malo, la procedencia urbana fueron los que predominaron en el estudio, así como los antecedentes patológicos familiares y la atopia como factores de riesgo que exacerbaron la enfermedad.

Introduction: episodes of bronchial obstruction at an early age are a frequent problem in pediatrics. A descriptive, longitudinal, retrospective study was conducted. Objective: to characterize the behavior of recurrent wheezing in children under 5 years of age belonging to the Bayamo municipality, of the "General Milanés" Teaching Pediatric Provincial Hospital in 2019. Methods: the sample consisted of 63 patients and the variables age, sex, breastfeeding, previous income, origin, gender of life and possible risk factors were studied. Statistical analysis was performed through estimates of absolute and relative frequencies. Results: there was a predominance of children aged 1 to 5 years with 52 cases (82.6%) and males, 29 of them belonged to this age group (80.6%); previous admissions of less than 3 days in 37 cases (66.1%) and 56 cases did not receive exclusive breastfeeding, 37 of them accounted for 66.1%; 44 cases had a bad lifestyle (69.8%) and of the 43 cases that came from the urban area, 28 belonged to that kind of life (65.1%); Family pathological history of allergy or asthma and atopy were the most significant wit. Conclusions: it was found that age from 1 to 5 years, male sex, income of less than three days, without breastfeeding, poor lifestyle, urban origin were those that predominated in the study, as well as family pathological history and atopy as risk factors that exacerbated the disease.

Introdução: episódios de obstrução brônquica em idade precoce são um problema frequente em pediatria. Trata-se de um estudo descritivo, longitudinal e retrospectivo. Objetivo: caracterizar o comportamento da sibilância recorrente em crianças menores de 5 anos pertencentes ao município de Bayamo, do Hospital Provincial Pediátrico Universitário "General Milanés", em 2019. Métodos: a amostra foi composta por 63 pacientes e estudadas as variáveis idade, sexo, aleitamento materno, renda prévia, procedência, sexo de vida e possíveis fatores de risco. A análise estatística foi realizada por meio de estimativas de frequências absolutas e relativas. Resultados: houve predomínio de crianças de 1 a 5 anos com 52 casos (82,6%) e do sexo masculino, sendo que 29 deles pertenciam a essa faixa etária (80,6%); internações anteriores inferiores a 3 dias em 37 casos (66,1%) e 56 casos não receberam aleitamento materno exclusivo, sendo que 37 deles corresponderam a 66,1%; 44 casos tinham estilo de vida ruim (69,8%) e dos 43 casos provenientes da zona urbana, 28 pertenciam a esse tipo de vida (65,1%); História anatomopatológica familiar de alergia ou asma e atopia foram as mais significativas, com 63 e 52 casos (100 e 82,5%), respectivamente. Conclusões: verificou-se que idade de 1 a 5 anos, sexo masculino, renda inferior a três dias, ausência de aleitamento materno, estilo de vida ruim, origem urbana foram os que predominaram no estudo, assim como história patológica familiar e atopia como fatores de risco que exacerbaram a doença.

Caracterización clinicoepidemiológica de niños con sibilancia recurrente / Clinical epidemiological characterization of children with recurrent wheezing

Introducción: Las sibilancias recurrentes en lactantes y preescolares son motivo frecuente de consulta en pediatría. Objetivo: Caracterizar a niños con sibilancia recurrente desde los puntos de vista clínico y epidemiológico. Métodos: Se realizó una investigación observacional, longitudinal y prospectiva de 140 niños con sibilancia recurrente, atendidos en el Servicio de Respiratorio del Hospital Infantil Docente Sur Dr. Antonio María Béguez César de Santiago de Cuba, desde de enero de 2016 hasta diciembre de 2018. Resultados: Predominaron el sexo masculino (57,1 %), los pacientes de procedencia urbana (62,1 %) y el área de salud 28 de septiembre como la de mayor incidencia (42,7 %). El promedio de edad fue de 1 año y 5 meses, aproximadamente. Los niños incluidos en el intervalo de 6 a 11 meses y 29 días fueron los más afectados (28,6 %). Entre los municipios, Guamá aportó el mayor número de casos (33,9 %). No existió asociación estadística entre el índice predictivo de asma y el sexo; sin embargo, resultó mayor entre los varones (19,3 %). Conclusiones: Las características clínicas y epidemiológicas de los pacientes con sibilancia recurrente de esta casuística no difieren del contexto epidemiológico mundial, siendo una entidad de observación frecuente en los servicios de pediatría.

Introduction: The recurrent wheezing in infants and preschool children are frequent reason of visit in pediatrics. Objective: To characterize children with recurrent wheezing from the clinical and epidemiologic points of view. Methods: An observational, longitudinal and prospective investigation of 140 children with recurrent wheezing, assisted in the Respiratory Service of Dr. Antonio María Béguez Cesar Southern Teaching Children Hospital was carried out in Santiago de Cuba, from January, 2016 to December, 2018. Results: There was a prevalence of the male sex (57.1 %), the patients of urban origin (62.1 %) and 28 de Septiembre health area as that of more incidence (42.7 %). The average age was of 1 year and 5 months, approximately. The children included in the interval from 6 to 11 months and 29 days were the most affected (28.6 %). Among the municipalities, Guamá contributed the higher number of cases (33.9 %). There was no statistical association between the prediction index of asthma and the sex; however, it was higher among males (19.3 %). Conclusions: The clinical and epidemiologic characteristics of the patients with recurrent wheezing of this case material don't differ from the world epidemiologic context, being an entity of frequent observation in the pediatrics services.

A azitromicina administrada para bronquiolite aguda pode ter um efeito de proteção na sibilância recorrente / Azithromycin administered for acute bronchiolitis may have a protective effect on subsequent wheezing

RESUMO Objetivo Uma proporção significativa de lactentes desenvolve sibilância recorrente após um evento de bronquiolite aguda (BA). Estudos recentes demonstraram proteção para sibilância recorrente e menor morbidade respiratória em lactentes tratados com azitromicina durante uma crise de sibilância. O objetivo do presente estudo foi testar a hipótese de que a administração de azitromicina durante um evento BA reduz sibilos e reinternações hospitalares subsequentes. Métodos Trata-se de uma análise secundária de um estudo randomizado, duplo-cego, controlado por placebo, incluindo dados não publicados de sibilância e hospitalizações durante os seis meses iniciais após a internação por bronquiolite aguda. O estudo foi realizado em um hospital universitário terciário. Os bebês (<12 meses de idade) hospitalizados com BA foram randomizados para receber azitromicina ou placebo, administrados por via oral, por sete dias. As famílias foram contatadas por telefone aos três e seis meses após o evento agudo inicial, e responderam a um questionário padronizado para identificar sibilos recorrentes e reinternações hospitalares. Resultados Cento e quatro pacientes foram incluídos (grupo Azitromicina, n=50; grupo Placebo, n=54). Considerando o total de pacientes contatados com sucesso três meses após a hospitalização (n=70), a taxa de recorrência de sibilância no grupo da azitromicina foi significativamente menor do que no grupo placebo (RR=0,48; CI=0,24-0.98; p=0,038). Conclusões A azitromicina reduziu significativamente o risco de sibilância subsequente entre zero e três meses após a admissão hospitalar por bronquiolite aguda.

ABSTRACT Objective A significant proportion of the infants developed recurrent wheezing after an acute bronchiolitis (AB) event. Recent studies have demonstrated protection for recurrent wheeze and lower respiratory morbidity in infants treated with azithromycin during an acute respiratory wheezing. The aim of the present study was to test the hypothesis that administration of azithromycin during an AB event reduces subsequent wheezing and hospital re-admissions. Methods This is a secondary analysis of a randomized, double-blinded, placebo-controlled trial, including unpublished data of wheezing and hospitalizations during the initial 6 months following admission for acute viral bronchiolitis. The study was performed in a tertiary University hospital. Infants (<12 months of age) hospitalized with AB were randomized to receive either azithromycin or placebo, administered orally, for 7 days. Families were contacted by telephone at 3 and 6 months after the initial acute event and answered to a standardized questionnaire in order to identify recurrent wheezing and hospital readmissions. Results One hundred and four patients were included (Azithromycin group, n= 50; placebo group, n=54). Considering the total of patients contacted 3 months after hospitalization (n=70), the recurrence rate of wheezing in the azithromycin group was significantly lower than in the placebo group (RR = 0.48; CI = 0.24-0.98; p = 0.038). Conclusion Azithromycin significantly reduces the risk of subsequent wheezing between 0 and 3 months after hospital admission due to acute bronchiolitis irrespective of the presence of respiratory syncytial virus.

Study of common aeroallergens in children with wheeze: a hospital based cross sectional study

Background: Prevention of diseases of the allergic origin depends upon the early identification of aeroallergens. Vaccine for allergy may not be required in all cases. but when treatment is not successful, then there is requirement of the vaccine. Objective of study allergens responsible for inducing recurrent wheezingMethods: A cross sectional observation study was carried out at Departmetn of Pediatric, Shadan Institue of Medical Sciences, Peerancheru, Hyderabad, Telangana, India from June 2017 to June 2018 among 100 children with recurrent (4 or more episodes of wheezing in past one year) ages between 2 yrs to 10 yrs. Using the guidelines for skin prick test as per the European committee, the skin prick test was carried out. Insulin syringe was used for the intradermal test. It is done using standardized allergen extracts (Creative Diagnostic Medicare pvt ltd) were done for our cases.Results: Out of 100 children studied, 67 children were found to be sensitive to at least one of the aeroallergen and 33 children were found to be negative for all the aeroallergens. A statistically significant correlation is seen between the age groups and sensitivity (p value 0.025). Out of 67 children with a positive skin prick test, 66 children showed the sensitivity to indoor allergens. The association between the indoor allergens and the wheezing is statistically significant (P value <0.0001)Conclusion: In children the sensitivity to indoor allergens is more prevalent than sensitivity to outdoor allergens. Sensitivity to pollen was found in older children more than 5 years of age.

Bronchodilator challenge test using the tidal rapid thoracoabdominal compression technique among infants aged 6-24 months with recurrent wheezing

BACKGROUND@#A definite diagnosis of asthma during infancy is difficult. Asthma Predictive Index (API) is used to predict asthma at school age, but does not determine who among these actually have asthma.@*OBJECTIVES@#This study aims to determine the bronchodilator response of infants with recurrent wheezing compared with normal control.@*METHODOLOGY@#This cross sectional study included asymptomatic subjects aged 6-24 months with history of recurrent wheezing and age/sex matched controls. After sedation with chloral hydrate (Odan) at 50-75 mg/kg, a bronchodilator challenge test was performed with single dose 400 mcg salbutamol (Ventolin) MDI inhalation delivered via a spacer (Philips Respironic OptiChamber Diamond). Baseline and 15 minutes after salbutamol inhalation Maximum Flow at Functional Residual Capacity (V‘maxFRC) were determined using MasterScreen Paed/BabyBody Option Squeeze version 8.0. ANOVA and Pearson chi-square were used for the statistical analysis of data.@*RESULTS@#Sixty-nine infants (23 previous wheezers and positive API, 23 previous wheezers with negative API and 23 controls) were included. There was a significant difference in the post bronchodilator challenge test V‘maxFRC between wheezers with positive API and controls (p= 0.047). There was no significant difference in other parameter among groups.@*CONCLUSION AND RECOMMENDATION@#Absolute values of V‘maxFRC post bronchodilator challenge using the Tidal Rapid Thoracoabdominal compression technique may be used to identify current asthma among asymptomatic infants with recurrent wheezing. Further studies with patient follow-up are recommended to assess response to treatment.

Analysis of incidence of post-bronchiolitis recurrent wheezing and its risk factors in children / 中华实用儿科临床杂志

Objective To investigate the incidence of post-bronchiolitis recurrent wheezing and its risk factors in children.Methods This study was conducted on patients with bronchiolitis admitted to the Department of Respiratory Disease,Children's Hospital of Soochow University between November 2016 and March 2017.Nasopharyngeal secretions were taken from all patients and assessed for respiratory pathogens.After discharge,the patients were followed up every 3 months by outpatient visit or telephone call for 1 year.Results Eighty-nine patients with bronchiolitis were enrolled in this study.Among those 89 patients,respiratory syncytial virus(RSV) infection accounted for 46.1％ (41/89 cases),Mycoplasma pneumonia(MP) for 5.6％ (5/89 cases),rhinovirus (RV) for 4.5％ (4/89 cases),and human bocavirus(hBoV) for 2.2％ (2/89 cases).Eighty-three patients were successfully followed up.At the 3,6,9,and 12 months of follow-up,the occurrence of wheezing episodes for only once happened in 20 cases(24.1％),27 cases(32.5％),35 cases (42.2％),and 38 cases (45.8％),respectively.At 12 months after initial bronchiolitis,the occurrence of wheezing episodes for only once happened in 21 cases (25.3％),2 episodes of wheezing in 10 cases (12.0％),and 7 cases (8.4％) had more than 3 episodes of wheezing,and 6 cases lost follow-up.The proportion of eczema and milk-protein allergy in post-bronchiolitis recurrent wheezing group was significantly higher than that of the group with not post-bronchiolitis recurrent wheezing patients (x2 =6.219,4.855,all P ＜ 0.05).Logistic regression analysis showed eczema was the independent risk factor for post-bronchiolitis recurrent wheezing(OR =0.189,95％ CI:0.047-0.765).There were no significant difference in gender,age,premature birth,birth weight,feeding patterns,family history of asthma,pet contact history,severity of disease,course of disease,total immunoglobulin E of serum and the species of virus infected between 2 groups (all P ＞ 0.05).Conclusions The incidence of recurrent wheezing among post-bronchiolitis patients is higher during one-year follow-up period.Eczema is the independent risk factor for post-bronchiolitis recurrent wheezing.The specific pathogens and severity of disease have no correlation with post-bronchiolitis wheezing.

Diagnostic value study of fractional exhaled nitric oxide (FeNO) in infants with recurrent wheezing / 国际儿科学杂志

Objective To analyze the correlation between the fractional exhaled nitric oxide (FeNO) levels and blood eosinophil (EOS) count and the frequency of wheeze in infants with recurrent wheezing.Methods From February 2015 to August 2016 in the General Hospital of Northern War Zone,outpatient department of Pediatrics treatment and hospitalization of age less than or equal to 3 year old children with recurrent wheezing,101 cases were induded as the research object.On the basis of asthma predictive index (API) score were divided into API positive group (n =55) and API negative group (n =46),according to the wheeze frequency of the two groups children were divided into 3 ～ 4 times wheezing groups and more than 5 times.Select 37 cases of healthy children as control group.The concentration of FeNO and blood EOS count are detected in all the children.The correlation between the three groups of children with FeNO concentration,the correlation between FeNO and blood EOS count,the correlation between the the frequency of wheeze and FeNO in experimental groups were analyzed.Results (1) API positive group mean FeNO (19.3 ± 6.2) ppb was significantly higher than API negative group (7.7 ± 2.9) ppb,there was no difference (P ＞ 0.05).API negative group mean FeNO (7.7 ± 2.9) ppb is lower than the normal control group (9.5 ± 2.0) ppb,there was no difference (P ＞0.05).(2) API positive group mean EOS count (124.7 ± 1.6) x 106/L is higher than API negative group (86.1 ± 1.9) x 106/L,there was significant difference (P ＜ 0.01);(3) There was a correlation between FeNO level and blood EOS count in API positive group,there was no correlation between FeNO level and blood EOS count in API negative group and con~ol group.(4) No statistical differences were found in ≤4 times wheezing groups and more than 5 times of the mean FeNO.Conclusion There is no significant difference in the mean value of FeNO between different times of wheezing in children with recurrent wheezing.The combination of medical history,EOS,FeNO and API might be used to predict the wheezing episode of infants.

Analysis of incidence of post-bronchiolitis recurrent wheezing and its risk factors in children / 中华实用儿科临床杂志

Objective@#To investigate the incidence of post-bronchiolitis recurrent wheezing and its risk factors in children.@*Methods@#This study was conducted on patients with bronchiolitis admitted to the Department of Respiratory Disease, Children′s Hospital of Soochow University between November 2016 and March 2017.Nasopharyngeal secretions were taken from all patients and assessed for respiratory pathogens.After discharge, the patients were followed up every 3 months by outpatient visit or telephone call for 1 year.@*Results@#Eighty-nine patients with bronchiolitis were enrolled in this study.Among those 89 patients, respiratory syncytial virus(RSV) infection accounted for 46.1%(41/89 cases), Mycoplasma pneumonia(MP) for 5.6%(5/89 cases), rhinovirus(RV) for 4.5%(4/89 cases), and human bocavirus(hBoV) for 2.2%(2/89 cases). Eighty-three patients were successfully followed up.At the 3, 6, 9, and 12 months of follow-up, the occurrence of wheezing episodes for only once happened in 20 cases(24.1%), 27 cases(32.5%), 35 cases (42.2%), and 38 cases(45.8%), respectively.At 12 months after initial bronchiolitis, the occurrence of wheezing episodes for only once happened in 21 cases(25.3%), 2 episodes of wheezing in 10 cases(12.0%), and 7 cases (8.4%) had more than 3 episodes of wheezing, and 6 cases lost follow-up.The proportion of eczema and milk-protein allergy in post-bronchiolitis recurrent wheezing group was significantly higher than that of the group with not post-bronchiolitis recurrent wheezing patients (χ2=6.219, 4.855, all P<0.05). Logistic regression analysis showed eczema was the independent risk factor for post-bronchiolitis recurrent wheezing(OR=0.189, 95%CI: 0.047-0.765). There were no significant difference in gender, age, premature birth, birth weight, feeding pa-tterns, family history of asthma, pet contact history, severity of disease, course of disease, total immunoglobulin E of serum and the species of virus infected between 2 groups(all P>0.05).@*Conclusions@#The incidence of recurrent wheezing among post-bronchiolitis patients is higher during one-year follow-up period.Eczema is the independent risk factor for post-bronchiolitis recurrent wheezing.The specific pathogens and severity of disease have no correlation with post-bronchiolitis wheezing.

Relationship between bronchiolitis and asthma / 中国实用儿科杂志

Bronchiolitis is the leading cause of wheezing in infants under 2 years old,mostly caused by viral infection. Respiratory syncytial virus(RSV)and rhinovirus(RV)are the most common pathogens. Recent studies have demonstrated a relationship between infants with bronchiolitis induced by virus infection(RSV or RV)in the early stage of life and the subsequent development of asthma later during childhood. This review summarized the relationship between bronchiolitis induced by RSV and RV infection and recurrent attacks of wheezing or asthma,the long-term impact on lung function,the pathogenesis,risk factors and prevention strategies of asthma after virus infection.

Sibilancias recurrentes: prevalencia y factores asociados en lactantes de Buenos Aires, Argentina / Recurrent wheezing: prevalence and associated factors in infants from Buenos Aires City, Argentina

Resumen: Introducción: Los episodios de obstrucción bronquial a temprana edad constituyen un problema frecuente en pediatría. El objetivo de este estudio, además de conocer la prevalencia de sibilancias recurrentes en lactantes de Buenos Aires, fue identificar los factores asociados. Métodos: Estudio de tipo transversal realizado durante 2011 y 2012, en el Hospital de Niños Ricardo Gutiérrez, Buenos Aires, como parte del Estudio Internacional de Sibilancias en Lactantes, mediante una encuesta validada para padres de lactantes de 12 a 15 meses. Se evaluó la prevalencia de sibilancias, fundamentalmente de tipo recurrentes (tres o más episodios) y los posibles factores asociados. El análisis estadístico se realizó por prueba de χ2, prueba de Fisher y análisis de regresión logística univariada y multivariada. El nivel de significación fue de 0.05. Resultados: De 1063 lactantes, el 58.9% (intervalo de confianza (IC) 95% 55.9-61.9) presentaron al menos un episodio de sibilancia y el 26.3% (IC 95% 23.8-29.9), tres o más episodios (sibilancias recurrentes). Los factores vinculados a padecer al menos un episodio de sibilancia fueron el sexo masculino (p = 0.001), seis o más resfríos en el primer año (p < 0.0001), edad del primer resfrío < 4 meses (p < 0.0001), neumonía (p < 0.0001), tabaquismo durante el embarazo (p = 0.01). Los factores relacionados con sibilancias recurrentes fueron seis o más resfríos en el primer año de vida (p < 0.0001), tener el primer episodio de sibilancia antes del cuarto mes de vida (p < 0.0001) y sibilancias nocturnas (p < 0.0001). Conclusiones: La prevalencia de sibilancias recurrentes en Buenos Aires es alta (26.3%). Algunos de los factores asociados serían prevenibles.

Abstract: Background: The episodes of bronchial obstruction at early age constitute a frequent problem in Pediatrics. The aim of this study was to evaluate the prevalence of recurrent wheezing in infants in Buenos Aires City, as well as to identify any associated factors. Methods: Cross-sectional study performed from 2011 to 2012 in the Children Hospital Ricardo Gutiérrez, Buenos Aires City, as part of the International Study of Wheezing in Infants. A validated questionnaire was applied to parents of infants aged between 12 and 15 months. The prevalence of wheezing, mostly the recurrent episodes (three or more), and their probable associated factors were evaluated. Data were statistically analyzed with χ2, Fisher's test, binary and logistics multiple regression analysis. The significance level was 0.05. Results: Over 1063 infants, 58.9% (confidence interval (CI) 95% 55.9-61.9) presented at least one episode of wheezing and 26.3% (CI95% 23.8-29.9) three or more episodes (recurrent wheezing). Risk factors associated to wheezing were male gender (p = 0.001), six or more episodes of cold during the first year of life (p < 0.0001), age at first cold < 4 months (p < 0.0001); pneumonia (p < 0.0001) and smoking during pregnancy (tobacco) (p = 0.01). For recurrent wheezing, risk factors we considered as six or more episodes of cold during the first year of life (p < 0.0001), early (< 4 month of age) onset wheezing (p < 0.0001) and nocturnal wheezing (p < 0.0001). Conclusions: The prevalence of recurrent wheezing among infants in Buenos Aires Ciy was high (26.3%). Some identified associated factors can be preventable.

The characteristics of tidal breath lung function and growth level among infants with recurrent wheezing / 临床儿科杂志

Objectives To study the relationship of recurrent wheezing and obesity among infants. Methods In 118 recurrent wheezing infants, the growth level are assessed based on the WHO standard. Meanwhile, all the infants are divided into two subgroups (normal-weight, overweight/obese), and the tidal breath lung function (tidal breath flow volume loop) are analyzed. Results Among the infants of 1-3 years old, for the growth level, the recurrent wheezing infants have higher index of weight, but almost the same level of height, compared with the WHO standard. For the tidal breath lung function, tidal volume (VT/kg) is significantly impaired in overweight/obese subgroup in comparison to the normal-weight subgroup. But the ratio of time to peak tidal expiratory flow (tPF) to total expiratory time (tE) and ratio of volume to peak expiratory flow (VPF) to total expiratory volume (VE), which reflect the airway obstructions to a certain extent, have no statistical differences among the two subgroups. Conclusions Rather than the height index, the weight index is significantly higher in the recurrent wheezing infants than the level of WHO standard. Compared with normal-weight patients, the tidal volume of overweight/obese recurrent wheezing in overweight/obese group is lower, but no significant differences are found for other parameters of airway obstructions.

Seguimiento de lactantes hospitalizados por bronquiolitis por virus respiratorio sincicial: Evolución clínica, respuesta de atopia inflamatoria y marcadores. Resultados preliminares / Follow-up of infants hospitalized for bronchiolitis by respiratory syncytial virus: Clinical evolution, inflammatory response and markers of atopy. Preliminary results

Background: Respiratory syncytial virus infection (RSV) alone or associated to rhinovirus (RV) in the infant has been linked with more likelihood to develop asthma and atopy. Aim: Analyze clinical and immunological markers of patients with RSV or RV bronchiolitis that determine their evolution. Patients and Methods: We studied previously healthy infants hospitalized for bronchiolitis during the fall-winter period of2009 and 2010. RSV and RV by qPCR, and proinflammatory interleukins (IL). IL-6, IL-8, TNF-a, IL-1fl and IL-12, were determined in nasopharyngeal aspirate (NPA). A follow-up clinical, indoor pollution and immunological study was done at 4 or 5 years. Results are expressed in median and range. Mann-Whitney’s test was used in the nonparametric statistical analysis. Results: Eight out of 22patients (36%) are currently with recurrent wheezing (RW) in treatment with budesonide 400 yg per day as a mean dose. In the IL assessment significant changes were detected only in IL-1fl that was increased and in IL-12 that was decreased in the RWgroup versus the non RW (NRW) group. There were not significant differences in both groups in age at hospitalization, infection severity, presence of personal or family atopy, co-infection with RSV and RV, presence of older siblings or indoor air pollution. Conclusions: The determination of IL-1fl and IL-12 in NPA for bronchiolitis could be an early marker of subsequent inflammation of the airway. Co-infection of RSV and RV does not get worse the clinical evolution. The group RW ofpreschool children had no further development of atopy than the NRW group. There could be other factors that contribute to the manifestation of bronchial inflammation in the RW group.

Introducción: Se ha relacionado la infección por Virus Respiratorio Sincicial (VRS) solo o asociado a Rinovirus (RV) en el período de lactante con mayor probabilidad de desarrollar atopia y asma. Objetivo: Analizar marcadores clínicos e inmunológicos de pacientes con bronquiolitis por VRS y/o RV que determinen su evolución. Material y Método: Lactantes previamente sanos hospitalizados por bronquiolitis, en el hospital Roberto del Río en el período de otoño-invierno de 2009 y 2010. Se determinó en aspirado nasofaríngeo (ANF) VRS y RV por qPCR, e interleuquinas (IL) proinflamatorias (IL-6, IL-8, TNF-a, IL-1fl e IL-12). Seguimiento clínico y estudio inmunológico a los 4 o 5 años. Los resultados se expresan en medianas y rango. Análisis estadístico no paramétrico con test de Mann-Whitney Resultados: 22 pacientes seguidos hasta ahora, 8 (36%) son actualmente sibilantes recurrentes (SR) en tratamiento con budesonida dosis mediana de 400 fg/día. De las ILs evaluadas sólo la elevación de la IL-1fi y la disminución de la IL-12 se objetivaron con diferencias significativas en el grupo de SR versus el grupo No SR. No hubo diferencias significativas en estos dos grupos en edad de hospitalización, gravedad de la infección, presencia de atopia personal o familiar, coinfección de VRS y RV, presencia de hermanos mayores ni contaminación intradomiciliaria. Conclusiones: La determinación de IL-1fi y de IL-12 en ANF durante la bronquiolitis podría ser un marcador precoz de inflamación posterior de la vía aérea. La co-infección de VRS y RV no empeora la evolución clínica. Este grupo de preescolares SR no tiene mayor desarrollo de atopia que los no SR. En este grupo de SR podrían existir otros factores que ayuden a contribuir a la manifestación de inflamación bronquial.

Study on the relationship between fractional exhaled nitric oxide level and asthma predictive index in recurrent wheezing infants under 3 years of age / 中国医师进修杂志

Objective To investigate the relationship between fractional exhaled nitric oxide (FENO) and asthma predictive index (API) in infants under 3 years of age. Methods Totally 62 cases (under 3 years of age) who were hospitalized from June 2015 to June 2016 and had more than 3 times wheezing over the past year were enrolled in this study. They were divided into two groups according to API:API positive group with 37 cases and API negative group with 25 cases. FENO levels and peripheral blood eosinophil levels were detected and skin prick allergy test (inhalation and ingestion of allergens)was done in all selected children, did skin prick allergy test (inhalation and ingestion of allergens), simultaneous detected peripheral blood eosinophil levels. The parents of the children were investigated by questionnaire to know the children′ history about atopic dermatitis (such as urticaria, eczema, etc) and parents′ wheezing history. Above information was recorded and statistics analysis was made. Results There were no significant differences between two groups in atopic dermatitis inhalation and ingestion of allergens (P<0.01 or <0.05). The level of FENO in API positive group and API negative group was (16.70 ± 11.07), (13.52 ± 11.01) ppb(1 ppb=1 × 10- 9 mol/L), and there was significant difference (P<0.01). Conclusions There are associations between FENO and API, and they have good reference value in predicting the risk of asthma.

Prevalence, Severity, and Treatment of Recurrent Wheezing During the First Year of Life: A Cross-Sectional Study of 12,405 Latin American Infants

PURPOSE: This study aimed to determine the prevalence and severity of recurrent wheezing (RW) defined as > or =3 episodes of wheezing, risk factors, and treatments prescribed during the first year of life in Latin American infants. METHODS: In this international, cross-sectional, and community-based study, parents of 12,405 infants from 11 centers in 6 South American countries (Argentina, Brazil, Chile, Colombia, Peru, and Uruguay) completed a questionnaire about wheezing and associated risk/protective factors, asthma medications, and the frequency of and indications for the prescription of antibiotics and paracetamol during the first year of life. RESULTS: The prevalence of RW was 16.6% (95% CI 16.0-17.3); of the 12,405 infants, 72.7% (95% CI 70.7-74.6) visited the Emergency Department for wheezing, and 29.7% (27.7-31.7) was admitted. Regarding treatment, 49.1% of RW infants received inhaled corticosteroids, 55.7% oral corticosteroids, 26.3% antileukotrienes, 22.9% antibiotics > or =4 times mainly for common colds, wheezing, and pharyngitis, and 57.5% paracetamol > or =4 times. Tobacco smoking during pregnancy, household income per month <1,000 USD, history of parental asthma, male gender, and nursery school attendance were significant risk factors for higher prevalence and severity of RW, whereas breast-feeding for at least 3 months was a significant protective factor. Pneumonia and admissions for pneumonia were significantly higher in infants with RW as compared to the whole sample (3.5-fold and 3.7-fold, respectively). CONCLUSIONS: RW affects 1.6 out of 10 infants during the first year of life, with a high prevalence of severe episodes, frequent visits to the Emergency Department, and frequent admissions for wheezing. Besides the elevated prescription of asthma medications, there is an excessive use of antibiotics and paracetamol in infants with RW and also in the whole sample, which is mainly related to common colds.

Arcada mitral: causa silente de sibilancias recurrentes en la infancia. Caso clínico / Anomalous mitral arcade: a disguised and silent lesion leading to a recurrent wheezing in children. A case report

El síndrome bronquial obstructivo recurrente o sibilante recurrente constituye uno de los motivos de consulta más frecuentes en pediatría. Entre los diagnósticos etiológicos diferenciales, se encuentran las cardiopatías congénitas. En esta presentación, se describe el caso de un niño de 4 años derivado a nuestra Institución para valoración cardiológica por presentar sibilancias recurrentes. Se trató de un caso de estenosis mitral congénita grave secundaria a arcada mitral. La arcada mitral es una cardiopatía congénita infrecuente. Constituye una variante de obstrucción al tracto de entrada del ventrículo izquierdo, que afecta el aparato subvalvular mitral y genera hipertensión pulmonar retrograda poscapilar y edema intersticial. El diagnóstico se realizó mediante la evaluación clínica, electrocardiográfica, radiológica y, fundamentalmente, ecocardiográfica. Se efectuó una corrección quirúrgica exitosa con remoción completa de la obstrucción mitral.

Recurrent wheezing is a very common clinical ailment throughout infancy and childhood. The most common diagnosis in children with wheezing is asthma. However, some other causes should be considered in the differential diagnosis such as a congenital cardiac defect. We present a case of a four year old boy presenting with recurrent wheezing who was referred to our institution for cardiac evaluation. Severe mitral stenosis secondary to an anomalous mitral arcade was diagnosed by physical examination, chest X-ray, electrocardiogram and mainly transthoracic and transesophageal echocardiography. Anomalous mitral arcade is a rare congenital malformation of the mitral tensor apparatus which comprises the chordae tendineae and papillary muscles. This abnormal anatomy leads to increased filling pressure of the left ventricle, a retrograde post capillary pulmonary hypertension and interstitial aedema. The patient was referred to cardiac surgery and underwent a successful procedure with complete removal of the obstructive mitral lesion.

Factores asociados a la sibilancia recurrente en lactantes de La Habana, Cuba / Factors associated to the recurrent wheezing in nurslings of Havana, Cuba

Introducción: en Cuba la prevalencia de sibilancia recurrente a nivel poblacional a edades tempranas es desconocida. Objetivo: identificar la magnitud y factores asociados en el lactante con sibilancia recurrente. Método: diseño epidemiológico transversal. Una muestra de 1956 niños entre las edades de 12 a 15 meses que viven en 4 municipios de La Habana fue seleccionada para su inclusión en el estudio. A los que se les aplicó por los investigadores un cuestionario validad internacionalmente y aplicado en el territorio nacional (ISAAC), con vista a obtener datos del primer año de vida. La sibilancia recurrente fue definida por la presencia de 3 ó más episodios. Resultados: la prevalencia de sibilancia recurrente fue de 20 por ciento. Los factores de riesgo de mayor importancia fueron: historia familiar de asma OR 1,89 (IC 95%:1,09-3,27), sospecha de alergia a picadura de insectos OR 1,75 (IC 95 por ciento: 1,09-2,80), antecedente de distress respiratorio al nacimiento OR 1,74 (IC 95 por ciento: 1,36-2,22) y el uso del paracetamol incluido el kogrip OR 1,40 (IC 95 por ciento: 1,14-1,73). Presencia de diferencias significativas del riesgo de sibilancia recurrente entre los 4 municipios luego del ajuste de factores de confusión. Conclusiones: la sibilancia recurrente fue identificada como un problema de salud en La Habana. Factores de riesgo modificables para la sibilancia recurrente fueron detectados en el grupo estudio, al igual que diferencias del riesgo entre los municipios. Hechos que debe tenerse en cuenta para la elaboración de futuras intervenciones(AU)

Introduction: prevalence of recurrent wheezing among Cuban infants is not known. Objective: Identify the magnitude and factors associated to recurrent wheezing in infants. Method: across-sectional epidemiological study was conducted of a sample of 1 956 children aged 12-15 months from four Havana municipalities randomly selected for inclusion in the research. A questionnaire validated internationally and used in the national territory (ISAAC) was applied to collect data about the first year of life. Recurrent wheezing was defined by the presence of three or more episodes. Results: prevalence of recurrent wheezing was 20 percent. The most important risk factors were a family history of asthma OR 1.89 (CI 95 percent:1.09-3.27), suspected allergy to insect bites OR 1.75 (CI 95 percent: 1.09-2.80), a history of respiratory distress at birth OR 1.74 (CI 95 percent: 1.36-2.22) and the use of paracetamol including Kogrip OR 1.40 (CI 95 percent: 1.14-1.73). Risk for recurrent wheezing showed significant differences between the four municipalities after adjustment for confounding factors. Conclusions: recurrent wheezing was identified as a health problem in Havana. Modifiable risk factors for recurrent wheezing were detected in the study sample. Risk differences were found between the municipalities. These facts should be considered when planning future interventions(AU)

Logistic regression analysis of preschool recurrent wheezing associated risk factors / 安徽医科大学学报

Objective To study the risk factors of preschool recurrent wheezing in Anhui area. Methods The clinical data from 816 children were collected through a questionnaire. The risk factors of preschool recurrent wheezing were investigated by logistic regression analysis. Results Preschool recurrent wheezing was associated with premature delivery, caesarean section, early weight gain(0 ~ 3 m), food allergy, allergic rhinitis, eczema, asthma or allergic rhinitis history of parents, passive smoking, viral infection and mycoplasma infection. The logis-tic regression analysis showed that premature delivery, early weight gain(0 - 3m), eczema, asthma or allergic rhi-nitis history of parents, passive smoking, viral infection and mycoplasma infection were the risk factors of preschool recurrent wheezing(P < 0. 05). Conclusion Premature delivery, early weight gain(0 - 3m), eczema, asthma or allergic rhinitis history of parents, passive smoking, viral infection and mycoplasma infection are the risk factors of preschool recurrent wheezing.

Meta analysis of the risk factors of recurrent wheezing in infants / 中华实用儿科临床杂志

Obgective To analyze the relevant risk factors of recurrent wheezing(≥3 attacks) in the first 3 years of life.Methods Wheezing,respiratory sounds,risk factor were used as key words to retrieve papers in Chinese literature databases including Sinomed,Wanfang and Weipu databases.The same strategy was used to retrieve English papers in English literature databases including PubMed,Cochrane library and Embase.Time range was from 31th May 2004 to 1 rd June 2014.The execution of quality evaluation of the included documents was in compliance with Newcastle-Ottawa Scale and cross-sectional study standard recommended by Agency for Healthcare Research and Quality.The evidence quality evaluation was conducted with GRADEpro and followed by the Meta analysis with RevMan 5.2.R~ults A total of 13 studies were included in this Meta-analysis.Several factors were related to recurrent wheezing episodes,including risk factors such as maternal smoking during pregnancy (OR =1.47,95％ CI:1.30-1.66),asthma in parents (OR =1.94,95 ％ CI:1.72-2.19),family history of atopy (OR =1.94,95％ CI:1.72-2.19),male (OR =1.42,95 ％ CI:1.19-1.69),history of eczema (OR =2.36,95 ％ CI:1.69-3.30),colds (＞ 6 times) (OR =2.02,95 ％ CI:1.54-2.64),history of bronchopneumonia (OR =1.85,95 ％ CI:1.46-2.34),exposure to cigarette smoking(OR =2.30,95％ CI:1.68-3.14),daycare attendance(OR =2.27,95％ CI:1.97-2.60);Education received by the mother ＞ 12 years (OR =0.80,95％ CI:0.70-0.92) was the protective factor.Conclusions The risk factors of recurrent wheezing(≥3 attacks) in the first 3 years of life are maternal smoking during pregnancy,asthma in parents,family history of atopy,male,history of eczema,colds (＞ 6 times),history of bronchopneumonia,exposure to cigarette smoking and daycare attendance.The protective factor is education received by the mother ≥ 12 years.The prerequisite in precaution of infants recurrent wheezing is to ensure the utmost avoidance of hazardous factors and reinforcement of protective factors.

Correlations between serum levels of 25-(OH) D3 and changes in Th1/Th2 cell balance in infants with recurrent wheezing / 中华实用儿科临床杂志

Objective To explore the relationship between levels of serum 25-(OH) D3 and changes in Th1/Th2 cell balance in infants with recurrent wheezing.Methods Sixty cases of infants with recurrent wheezing were involved and 60 cases of healthy children were selected as controls.Enzyme linked immunosorbent assay (ELISA) was used to detect the levels of serum 25-(OH) D3 and double-antibody sandwich (ABC-ELISA) was used to detect the serum levels of interferon-γ(IFN-γ),interleukin (IL)-4,IL-13,and then the relationship between the levels of serum 25-(OH) D3 and changes in Th1/Th2 balance in infants with recurrent wheezing were explored.Results Serum 25-(OH) D3 levels decreased significantly in the infants with recurrent wheezing group compared with those of the healthy control group [(18.24 ± 5.64) μg/L vs (37.85 ± 7.78) μg/L] (t =15.810,P =0.000).Serum IFN-γ levels decreased significantly in the infants with recurrent wheezing group compared with those of the healthy control group [(11.20 ± 2.08) ng/L vs (20.68 ± 3.87) ng/L] (t =16.700,P =0.000).In contrast,serum IL-4,IL-13 levels increased significantly in the infants with recurrent wheezing group compared with those of the healthy control group[IL-4:(28.61 ±6.44) ng/L vs (22.14±5.29) ng/L;IL-13:(20.02±4.83) ng/L vs (17.72± 4.06) ng/L] (t =6.201,P =0.000 ; t =2.829,P =0.006).Th1/Th2 in the infants with recurrent wheezing group were lower than that those of the healthy control group,and there was statistically significant difference between two groups(0.41 ± 0.12 vs 1.00 ± 0.36) (t =11.796,P =0.000).Serum 25-(OH) D3 levels were negatively correlated with Th1/Th2 in the infants with recurrent wheezing(r =-0.649,P =0.000).There were no correlation between serum 25-(OH) D3 levels and Thl/Th2 in the healthy control group(r =-0.217,P =0.096).Conclusions Low serum 25-(OH) D3 may be the risk factor for recurrent wheezing in infants.Serum 25-(OH) D3 levels were negatively correlated with Th1/Th2 in the infants with recurrent wheezing group,which show that recurrent wheezing in the infants is closely related to allergic reaction.