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OBJECTIVE: Previous studies of asthma-related school absenteeism have reported absenteeism dichotomously (ie, any school days missed vs none). However, schools use higher thresholds to identify and intervene for students at risk of chronic absenteeism (18 days or ≥10% schoolyear missed), which is associated with negative health and educational outcomes. We sought to identify factors associated with excessive absenteeism (EA) due to asthma (≥9 days missed), a threshold based on a convention defined by Attendance Works for absenteeism risk, and is linked to decreased academic performance and increased risk of chronic absenteeism. METHODS: We examined responses for asthma-related absenteeism from the 2011 to 2014 California Health Interview Survey for children ages 5-11. Multivariate logistic regression modeled odds ratios of EA for demographic, healthcare utilization, and asthma-related factors. Sensitivity analysis was performed modeling a ≥1 threshold (any absenteeism). RESULTS: 715 respondents represent an estimated 314,200 California schoolchildren with asthma. 50.3% of students missed ≥1 day, and 11.7% missed ≥9 days of school due to asthma. Odds of EA were significantly higher for younger children, lower-income families, and rural students, but not significant for any absenteeism. Indicators of greater asthma severity and poorer control were significantly associated with both EA and any absenteeism. CONCLUSIONS: This study identified factors significantly associated with EA that were not significant for lower absence thresholds. This may help direct school-based asthma interventions for which limited resources must target students at higher risk of chronic absenteeism.
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Absentismo , Asma , Asma/epidemiología , California/epidemiología , Niño , Preescolar , Humanos , Instituciones Académicas , EstudiantesRESUMEN
OBJECTIVES: The Infant and Child Feeding Questionnaire (ICFQ) was created to facilitate early detection of feeding and swallowing problems. This is achieved by promoting effective communication between caregivers and health care providers resulting in referral for evaluation and treatment of feeding and swallowing problems by specialists. The purpose of this pilot study was to determine whether items from the ICFQ could be used to screen for differences between children with known feeding problems (FP) and without known feeding problems (NFP). METHODS: Caregivers of children ages 36 months or younger with FP and NFP were recruited to complete the ICFQ and demographic questions. T tests were completed to compare demographic characteristics of the research groups. Responses to ICFQ items were analyzed using receiver operating characteristic analysis and odds ratios to determine whether questionnaire items distinguished between study groups. RESULTS: Sixty-four caregivers of children with FP and 57 caregivers of NFP children were recruited. Three participants in the NFP group did not meet inclusion criteria and were excluded from analysis. A combination of 4 ICFQ questions distinguished between groups (receiver operating characteristicâ=â0.974). Significant odds ratios were also found for 9 feeding behaviors that distinguished between groups. CONCLUSIONS: A subset of items from the ICFQ showed promise for distinguishing FP from NFP groups. Future work will expand the regional representation of the participant samples and obtain equal representation of participants across all age-adjusted questionnaires to determine whether the same combination of ICFQ items continues to distinguish between FP and NFP groups.
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Cuidadores , Trastornos de Deglución/diagnóstico , Trastornos de Alimentación y de la Ingestión de Alimentos/diagnóstico , Encuestas y Cuestionarios , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Oportunidad Relativa , Proyectos Piloto , Psicometría , Curva ROCRESUMEN
Childhood asthma is a prevalent and costly chronic condition. Optimal management enables secondary and tertiary prevention. The goal was to identify population health considerations for pediatric asthma in California to inform the development of quality improvement interventions. California Health Interview Survey 2011-2012 is a random-digit dial telephone survey conducted in 5 languages. It includes 44,000 households from all 58 counties in California. This study assessed factors related to symptom control and health care use in children ages 2-11 years with asthma. An estimated 492,385 (9.6%) of children in California currently have asthma. Urban and rural residents face comparable asthma disease burdens. School-age male children as well as Asian and African American children are disproportionately affected. Asthma causes significant morbidity, with poorer health status, high utilization of emergency care, and the need for daily medication use. Only 38% of children with asthma have a recent asthma management plan. Half of all children with asthma did not receive influenza immunization in the past year, although this reflects the overall low rate of influenza vaccination. Parents of children with asthma frequently utilize the Internet for health information and communication with their child's health care provider. Children with asthma in California face several population-level challenges, including poor health status, low influenza vaccination rates, high use of emergency care, and suboptimal use of health literacy tools. Focusing on improved care coordination and preventive care for high-risk groups is especially urgent given the expansion of public health insurance and impending shortages in the primary care workforce. (Population Health Management 2016;19:145-151).
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Asma , Planificación en Salud , Asma/epidemiología , California/epidemiología , Niño , Preescolar , Atención a la Salud/normas , Femenino , Disparidades en el Estado de Salud , Encuestas Epidemiológicas , Humanos , Masculino , Mejoramiento de la CalidadRESUMEN
Clinicians vary significantly in their adherence to clinical guidelines for overweight/obesity. This study assessed the impact of electronic health record-based clinical decision support in improving the diagnosis and management of pediatric obesity. The study team programmed a point-of-care alert linked to a checklist and standardized documentation templates to appear during health maintenance visits for overweight/obese children in an outpatient teaching clinic and compared outcomes through medical record reviews of 574 (287 control and 287 intervention) visits. The results demonstrated a statistically significant increase in the diagnosis of overweight/obesity, scheduling of follow-up appointments, frequency of ordering recommended laboratory investigations, and assessment and counseling for nutrition and physical activity. Although clinical guideline adherence increased significantly, it was far from universal. It is unknown if modest improvements in adherence to clinical guidelines translate to improvements in children's health. However, this intervention was relatively easy to implement and produced measurable improvements in health care delivery.
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Sistemas de Apoyo a Decisiones Clínicas/organización & administración , Registros Electrónicos de Salud/organización & administración , Obesidad Infantil/diagnóstico , Obesidad Infantil/terapia , Atención Primaria de Salud/organización & administración , Adolescente , Índice de Masa Corporal , Lista de Verificación , Niño , Preescolar , Consejo , Sistemas de Apoyo a Decisiones Clínicas/normas , Dieta , Registros Electrónicos de Salud/normas , Ejercicio Físico , Femenino , Adhesión a Directriz , Humanos , Masculino , Sobrepeso/diagnóstico , Sobrepeso/terapia , Guías de Práctica Clínica como Asunto , Atención Primaria de Salud/normas , Calidad de la Atención de Salud/organización & administración , Factores de RiesgoRESUMEN
BACKGROUND: Increased consumption of sugar-sweetened beverages (SSBs) over the past two decades has been implicated in the increased incidence of metabolic disorders in the pediatric population, but whether racial differences exist with regard to SSB intake among adolescents is unknown. OBJECTIVE: To evaluate racial trends in SSB consumption in US adolescents. STUDY GROUP: In total, 10,201 individuals aged 12-19 years from the National Health and Nutrition Examination Survey (NHANES) during the years 1988-1994 and 1999-2004 were included in the study. METHODS: Multivariate linear regression analyses were performed to determine SSB consumption trends. RESULTS: From 1988 to 2004, SSB intake increased more in adolescents from racial minorities than in their Caucasian counterparts. Although other Hispanics and non-Hispanic whites consumed more SSBs than other racial groups at the beginning of the study, the amount of SSBs consumed by other racial groups increased in the interval time such that total SSB consumption in each racial group was comparable by the end of the study period. Sex-related differences in SSB consumption trends among racial groups were also observed. CONCLUSIONS: SSB consumption trends have differed among racial groups and between the sexes over the past two decades, with SSB intake having increased more dramatically in racial minorities during this time than in non-Hispanic whites. Although other Hispanics and non-Hispanic whites consumed more SSBs than other racial groups in 1988-1991, SSB consumption among adolescents from all racial groups was comparable by 2003-2004. Furthermore, adolescents from most racial groups consumed more SSBs in 1994-2004 than in 1988-1994, paralleling the increase in pediatric obesity and metabolic syndrome.
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Bebidas/estadística & datos numéricos , Sacarosa en la Dieta , Grupos Raciales/estadística & datos numéricos , Adolescente , Adulto , Negro o Afroamericano/estadística & datos numéricos , Factores de Edad , Niño , Femenino , Hispánicos o Latinos/estadística & datos numéricos , Humanos , Masculino , Factores Sexuales , Estados Unidos , Población Blanca/estadística & datos numéricosRESUMEN
We report on a 5-year-old Caucasian female with multiple anomalies whose deletion, 46,XX,del(21)(q22.11q22.13), was determined by a 105K oligonucleotide-based microarray. This case is a unique deletion that mimicked Fanconi anemia (combination of thrombocytopenia, thumb anomalies, congenital heart defects, borderline small head circumference, strabismus, hydronephrosis, and significant developmental delay) but testing for Fanconi anemia was negative, as was testing for a wide array of genetic/metabolic conditions. Microarray testing done at 5 months failed to demonstrate the interstitial deletion that was found on a newer generation microarray test performed after 3 years of age. When compared to other reported cases of partial monosomy 21q, the unique features of this case include: (1) cleft palate, although high palate is reported in other cases; (2) neonatal thrombocytopenia requiring platelet transfusion; (3) a platelet function defect, reported previously as platelet storage pool defect as part of a familial platelet disorder; and (4) an immune function defect. Similar to other reported patients with terminal 21q deletion, this child had significant developmental delay, and feeding and growth problems. This case also highlights the ability for newer technology microarrays to identify small interstitial deletions previously missed by an earlier version microarray. The advances in the microarray technologies are allowing us to better define new phenotypes and leading to the identification of a diagnosis for many patients who have been previously undiagnosed. Review of the genes involved in these novel deletions allows the caring physician to design surveillance strategies that are custom-designed for these unique patients.
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Anomalías Múltiples/genética , Anemia de Fanconi/genética , Fenotipo , Anomalías Múltiples/patología , Trastornos de las Plaquetas Sanguíneas/genética , Trastornos de las Plaquetas Sanguíneas/patología , Niño , Deleción Cromosómica , Cromosomas Humanos Par 21/genética , Fisura del Paladar/genética , Fisura del Paladar/patología , Diagnóstico Diferencial , Anemia de Fanconi/patología , Femenino , Humanos , Análisis de Secuencia por Matrices de Oligonucleótidos , Trombocitopenia Neonatal Aloinmune/genética , Trombocitopenia Neonatal Aloinmune/patologíaRESUMEN
OBJECTIVE: To describe racial and gender differences in insulin resistance-associated parameters due to sugar-sweetened beverage (SSB) intake and physical activity (PA) levels in the adolescent population. METHODS: Data from individuals aged 12 to 19 years from the National Health and Nutrition Examination Survey during the years 1999-2004 were analyzed. SSB intake and PA levels were evaluated in Non-Hispanic whites, Non-Hispanic blacks, and Mexican Americans. Outcome measures included measurements of insulin sensitivity, lipids, blood pressure, waist circumference, and body mass index. RESULTS: Multivariate linear regression analyses showed that anthropometric measurements, metabolic parameters, and indices of insulin resistance differed among the racial groups. Moreover, within each of these racial groups, they differed between the sexes. CONCLUSIONS: The differing relationships between insulin resistance-associated parameters and SSB intake and PA levels among racial groups and between the sexes illustrate the importance of race and gender in the investigation of diseases such as obesity and metabolic syndrome.
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Bebidas/efectos adversos , Etnicidad/estadística & datos numéricos , Resistencia a la Insulina/etnología , Actividad Motora , Edulcorantes/efectos adversos , Adolescente , Negro o Afroamericano/estadística & datos numéricos , Presión Sanguínea , Índice de Masa Corporal , Niño , Femenino , Humanos , Modelos Lineales , Lípidos/sangre , Masculino , Americanos Mexicanos/estadística & datos numéricos , Análisis Multivariante , Encuestas Nutricionales , Factores Sexuales , Estados Unidos/epidemiología , Circunferencia de la Cintura , Población Blanca/estadística & datos numéricos , Adulto JovenRESUMEN
The purpose of this study was to evaluate current sugar-sweetened beverage (SSB) consumption trends and their association with insulin resistance-related metabolic parameters and anthropometric measurements by performing a cross-sectional analysis of the NHANES data during the years 1988-1994 and 1999-2004. Main outcome measures included SSB consumption trends, a homeostasis model assessment of insulin resistance, blood pressure, waist circumference, body mass index, and fasting concentrations of total cholesterol, HDL-cholesterol, LDL-cholesterol, and triglycerides. Although overall SSB consumption has increased, our data suggest that this increase was primarily due to an increase in the amount of SSBs consumed by males in the high-SSB intake group alone. Multivariate linear regression analyses also showed that increased SSB consumption was independently associated with many adverse health parameters. Factors other than SSB consumption must therefore be contributing to the increasing prevalence of obesity and metabolic syndrome in the majority of US children.
RESUMEN
AIM: To determine if videotapes about newborn circumcision would be superior to traditional physician 'informed consent' discussion for maternal knowledge, satisfaction and perception of provider bias. DESIGN/METHODS: A convenience sample of mothers interested in or undecided about circumcision was randomized to watch a video on: (i) circumcision risks/benefits ('Video-Plus' n = 168); or (ii) unrelated material followed by traditional physician risk/benefit discussion ('Standard-MD' n = 136). Questionnaires were administered during hospitalization and subsequent telephone interviews. Statistical differences were analysed by chi-square and Wilcoxon signed rank test. RESULTS: Most mothers (82%) decided about circumcision prenatally. Fewer mothers perceived bias from the video vs. physicians [1.1% vs. 6.8%, p = 0.04]. Composite knowledge (correct of 10 answers) [ (SD) 6.5 (2.1) vs. 6.4 (2.1), p = 0.78] or satisfaction [5-point Likert scale, 3.98 (1.50) vs. 3.75 (1.58), p = 0.16] did not differ by group, although more highly educated mothers preferred the video [satisfaction 4.08 (1.01) vs. 2.63 (0.99), p = 0.04]. Significant knowledge gaps existed in both groups. CONCLUSION: In this setting, no difference in maternal knowledge was found between 'Video-Plus' and traditional informed consent although more highly educated mothers preferred the video. Better ways to achieve understanding of risks and benefits for this elective procedure should be sought.
Asunto(s)
Circuncisión Masculina , Consentimiento Paterno , Grabación en Video , Adulto , California , Comportamiento del Consumidor , Femenino , Conocimientos, Actitudes y Práctica en Salud , Humanos , Recién Nacido , Masculino , Madres , Relaciones Profesional-FamiliaRESUMEN
BACKGROUND: Assessment of weight and counselling on nutrition and physical activity is infrequently conducted during well child visits, despite recent expert recommendations. OBJECTIVE: We investigated whether automatic calculation of body mass index (BMI) in an electronic health record improved assessment of weight and counselling on nutrition and physical activity. METHODS: Retrospective review of well child visit records of children between two and 18 years of age (n =550) before and after implementation of an electronic health record system at an academic medical centre's paediatric clinic. Body mass index was automatically calculated and presented within the electronic health record. We measured clinicians' documentation of assessment of weight status, and assessment of and counselling for nutrition and physical activity risk factors. RESULTS: Documentation of assessment of BMI and weight status did not increase. There were no consistent increases in assessment for or counselling on specific nutrition and physical activity behaviours, except with respect to high calorie food intake. Although overall assessment of physical activity decreased, physical activity counselling significantly increased. Documentation of the presence of high-risk family history increased significantly; the provision of counselling for high-risk family history did not show any corresponding increase. Patients with higher BMI percentile scores were more completely assessed for weight status. Completeness of weight status assessment was associated with increased counselling for nutrition and physical activity. CONCLUSIONS: Passive changes, such as automatic calculation of BMI, are insufficient to result in systematic improvements in assessment of weight and counselling for nutrition and physical activity.
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Índice de Masa Corporal , Consejo/tendencias , Registros Electrónicos de Salud , Obesidad/prevención & control , Pautas de la Práctica en Medicina/tendencias , Adolescente , California , Niño , Ciencias de la Nutrición del Niño/educación , Preescolar , Femenino , Promoción de la Salud/métodos , Promoción de la Salud/tendencias , Humanos , Masculino , Actividad Motora , Obesidad/diagnóstico , Obesidad/terapia , Análisis de Regresión , Estudios RetrospectivosRESUMEN
OBJECTIVE: To evaluate the relationship between insulin resistance-associated metabolic parameters and anthropometric measurements with sugar-sweetened beverage intake and physical activity levels. DESIGN: A cross-sectional analysis of the National Health and Nutrition Examination Survey data collected by the National Center for Health Statistics. SETTING: Nationally representative samples of US adolescents participating in the National Health and Nutrition Examination Survey during the years 1999-2004. PARTICIPANTS: A total of 6967 adolescents aged 12 to 19 years. MAIN EXPOSURE: Sugar-sweetened beverage consumption and physical activity levels. OUTCOME MEASURES: Glucose and insulin concentrations, a homeostasis model assessment of insulin resistance (HOMA-IR), total, high-density lipoprotein, and low-density lipoprotein cholesterol concentrations, triglyceride concentrations, systolic and diastolic blood pressure, waist circumference, and body mass index (calculated as weight in kilograms divided by height in meters squared) percentile for age and sex. RESULTS: Multivariate linear regression analyses showed that increased sugar-sweetened beverage intake was independently associated with increased HOMA-IR, systolic blood pressure, waist circumference, and body mass index percentile for age and sex and decreased HDL cholesterol concentrations; alternatively, increased physical activity levels were independently associated with decreased HOMA-IR, low-density lipoprotein cholesterol concentrations, and triglyceride concentrations and increased high-density lipoprotein cholesterol concentrations. Furthermore, low sugar-sweetened beverage intake and high physical activity levels appear to modify each others' effects of decreasing HOMA-IR and triglyceride concentrations and increasing high-density lipoprotein cholesterol concentrations. CONCLUSIONS: Sugar-sweetened beverage intake and physical activity levels are each independently associated with insulin resistance-associated metabolic parameters and anthropometric measurements in adolescents. Moreover, low sugar-sweetened beverage intake and high physical activity levels appear to modify each others' effects on several health-related outcome variables.
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Antropometría , Bebidas , Resistencia a la Insulina/fisiología , Actividad Motora/fisiología , Edulcorantes/administración & dosificación , Adolescente , Factores de Edad , Glucemia/análisis , Índice de Masa Corporal , Niño , Estudios Transversales , Metabolismo Energético/fisiología , Femenino , Promoción de la Salud , Humanos , Modelos Lineales , Masculino , Análisis Multivariante , Encuestas Nutricionales , Probabilidad , Factores Sexuales , Estados Unidos , Adulto JovenRESUMEN
OBJECTIVE: To determine if vitamin and mineral supplement use among children and adolescents in the United States is associated with nutrition, food security, physical activity, and health care access. DESIGN: Secondary analysis of nationally representative data from the 1999-2004 National Health and Nutrition Examination Survey. SETTING: Questionnaires, household interviews, and medical examinations. PARTICIPANTS: Children and adolescents 2 to 17 years of age (N = 10 828). MAIN EXPOSURE: Vitamin and mineral supplement use in the past month. MAIN OUTCOME MEASURES: Demographics, nutrition, food security, physical activity, and health care access. RESULTS: Approximately 34% (SE 1.2) used vitamin and mineral supplements in the past month, with underweight subjects reporting greater intake. Younger age, non-Hispanic white race/ethnicity, being born in the United States, higher milk intake, lower total fat and cholesterol intake, higher dietary fiber intake, higher income, greater food security, lower media/computer use, greater physical activity, lower body mass index, health insurance coverage, better health care access, and better self-reported health were associated with greater use of vitamin and mineral supplements. Such supplements contributed significantly to total daily dietary intakes of vitamins and minerals. CONCLUSIONS: A large number of US children and adolescents use vitamin and mineral supplements, which for most may not be medically indicated. Such supplements contribute significantly to total dietary intakes of vitamins and minerals, and studies of nutrition should include their assessment. Since vitamin and mineral supplement users report greater health care access, health care providers may be in a position to provide screening and counseling regarding dietary adequacy and indications for supplement use.
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Suplementos Dietéticos/estadística & datos numéricos , Abastecimiento de Alimentos , Accesibilidad a los Servicios de Salud , Minerales/administración & dosificación , Actividad Motora , Encuestas Nutricionales , Vitaminas/administración & dosificación , Adolescente , Niño , Preescolar , Femenino , Humanos , Masculino , Factores Socioeconómicos , Estados UnidosRESUMEN
OBJECTIVE: The magnitude and consequences of low literacy in adolescent health and health care are unknown. The purpose of this study was to validate the Rapid Estimate of Adolescent Literacy in Medicine (REALM-Teen), a word-recognition test in English that can be used as a brief literacy-screening tool in health care settings. PATIENTS AND METHODS: A total of 1533 adolescents aged 10 to 19 years attending 1 of 5 middle schools, 3 high schools, 1 pediatric clinic, or 2 summer programs in Louisiana and North Carolina participated in face-to-face interviews. Demographic information was solicited, and participants were administered a battery of reading tests, including the REALM-Teen, Wide Range Achievement Test-Revised (WRAT-3), and Slosson Oral Reading Test-Revised (SORT-R). Internal consistency for the REALM-Teen was determined using Cronbach's alpha, and criterion validity was established through correlations with both the WRAT-R and SORT-R. Using reading below grade level (according to SORT-R scores) as an outcome, instrument accuracy and corresponding cutoff scores were calculated by plotting receiver operating characteristic curves and stratum-specific likelihood ratios. RESULTS: Participants were 50% black and 53% female; 34% were enrolled in middle school and 66% in high school. The average time required to administer the REALM-Teen was 3 minutes. Internal consistency was excellent, as was test-retest reliability. The REALM-Teen is strongly correlated with both the WRAT-R and SORT-R. Five reading level categories were identified: 3rd grade and below, 4th to 5th grade, 6th to 7th grade, 8th to 9th grade, and 10th grade and above. Forty-six percent of participants were reading below grade level according to the SORT-R and 28% had repeated at least 1 grade. CONCLUSION: The REALM-Teen is a brief, reliable instrument for assessing adolescent literacy skills and reading below grade level.
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Evaluación Educacional , Escolaridad , Lectura , Adolescente , Adulto , Niño , Femenino , Humanos , MasculinoRESUMEN
PURPOSE OF REVIEW: To review the possible reasons why the prevalence and morbidity of asthma are greater in those living in an urban setting. RECENT FINDINGS: Urban asthma is associated with exposure to air pollution, urban allergens, and violence. Outdoor air pollution is a particular problem in urban areas and affects children more than adults. Asthma has been shown to be exacerbated by ozone, respirable particulates, and nitrogen dioxide. Exposure to high point sources of pollutants such as heavy traffic is of particular concern. Urban allergens include cockroach, mouse, and rat. Cockroach exposure increases the risk of asthma exacerbations and may increase the risk of developing asthma. Although mouse allergen is also found in suburban homes, the concentration is a log-fold higher in inner-city homes at levels known to elicit symptoms in workers in animal facilities. Rat allergen is found in a third of inner-city homes and is associated with asthma morbidity. A recent interventional study showed that comprehensive environmental control of cockroach allergen reduced asthma morbidity. Finally, stress elicits asthma symptoms and exposure to violence is associated with greater asthma morbidity. SUMMARY: The increase in prevalence and morbidity of asthma associated with urban living is associated with at least three plausible causative factors each of which is amenable to intervention, raising the issue of environmental justice issues: controlling air pollution in general and exposure to point sources in particular; reducing cockroach, mice, and rat infestations; and preventing violence.
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Asma/etiología , Salud Urbana , Contaminación del Aire , Alérgenos , Asma/epidemiología , Exposición a Riesgos Ambientales , Humanos , Morbilidad , Prevalencia , Factores de Riesgo , Población UrbanaRESUMEN
OBJECTIVE: To investigate the association of breastfeeding during adolescence with bone mineral density (BMD) during young adulthood. METHODS: Secondary analysis of data from the National Health and Nutrition Examination Survey III, a nationally representative cross-sectional survey conducted from 1988 through 1994, was performed. The BMDs for 5 regions of the proximal femur as measured by dual energy x-ray absorptiometry were compared for 5 groups of women aged 20 to 25 years (n = 819); the groups included those who had been: (1) adolescent mothers and had breastfed (n = 94), (2) adolescent mothers and had not breastfed (n = 151), (3) mothers who first gave birth as adults and breastfed (n = 67), (4) mothers who first gave birth as adults and had not breastfed (n = 89), and (5) nulliparous (n = 418). SUDAAN software was used to account for the complex sampling design of the National Health and Nutrition Examination Survey. Adjusted mean differences in BMD were estimated using least-squares linear regression. RESULTS: During young adulthood, women who breastfed during adolescence had higher adjusted BMDs, which was statistically significant in 4 of the 5 regions, than those who had not breastfed (total proximal femur area difference, 0.049 gm/cm(2) [95% confidence interval, 0.002-0.095]) and BMDs equivalent to nulliparous women (total proximal femur area difference, 0.024 gm/cm(2) [95% confidence interval, -0.023 to 0.071]). Adjusting also for obstetric variables, women who breastfed during adolescence had higher BMDs in all 5 regions compared with their peers who had not breastfed (total proximal femur area difference, 0.053 gm/cm(2) [95% confidence interval, 0.029-0.077]). CONCLUSIONS: In this nationally representative sample, breastfeeding by adolescent mothers was associated with greater BMD in the proximal femur during young adulthood. Lactation was not found to be detrimental and may be protective to the bone health of adolescent mothers.
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Densidad Ósea , Lactancia Materna/estadística & datos numéricos , Cuello Femoral/metabolismo , Lactancia/metabolismo , Absorciometría de Fotón , Adolescente , Adulto , Actitud Frente a la Salud , Intervalos de Confianza , Factores de Confusión Epidemiológicos , Estudios Transversales , Femenino , Cuello Femoral/diagnóstico por imagen , Humanos , Lactancia/fisiología , Oportunidad Relativa , Embarazo , Factores de Tiempo , Estados UnidosRESUMEN
BACKGROUND: The relationships among weight and height growth, viral load and survival in HIV-infected children remain unclear. OBJECTIVES: To determine whether weight or height growth velocity independently predicts survival and to investigate associations of weight, height and head circumference growth velocities with viral loads in symptomatic HIV-infected children. METHODS: We analyzed data from a prospective antiretroviral study utilizing clinical endpoints (PACTG 152). Viral load [log(RNA PCR)] and anthropometric measures 12 weeks before and after viral load measures were available in 494 of 831 children. Interval changes during 24 weeks in z-scores for weight-for-age (DeltaWAZ), height-for-age (DeltaHAZ) and head circumference-for-age (DeltaHCZ) were used as growth velocity surrogates. Logistic regression determined whether DeltaWAZ and/or DeltaHAZ correlated with survival when age, viral load and CD4+ cell count were controlled. Bivariate analysis assessed correlation among viral load and DeltaWAZ, DeltaHAZ and/or DeltaHCZ. RESULTS: Survival related significantly to height growth velocity (P = 0.03, n = 434) but not to weight growth velocity (P = 0.84, n = 446) or head circumference growth velocity (P = 0.67, n = 148). Viral load was not significantly associated with changes in weight-, height-, or head circumference-for-age z scores (P = 0.86, n = 235; P = 0.07, n = 226; and P = 0.09, n = 165, respectively) in children <30 months of age or with changes in weight- or height-for-age z scores (P = 0.27, n = 259; P = 0.11, n = 251) in older children. CONCLUSIONS: Height growth velocity predicted survival independently of age, viral load and CD4+ cell count. Weight, height and head circumference growth velocities were not significantly associated with viral load in symptomatic HIV-infected children in this large prospective trial of nucleoside reverse transcriptase therapy.
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Fármacos Anti-VIH/uso terapéutico , Causas de Muerte , Crecimiento/fisiología , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/mortalidad , Carga Viral/estadística & datos numéricos , Adolescente , Distribución por Edad , Recuento de Linfocito CD4 , Niño , Desarrollo Infantil/fisiología , Preescolar , Estudios de Cohortes , Estudios de Evaluación como Asunto , Femenino , Infecciones por VIH/diagnóstico , Sobrevivientes de VIH a Largo Plazo/estadística & datos numéricos , Humanos , Lactante , Masculino , Reacción en Cadena de la Polimerasa/métodos , Valor Predictivo de las Pruebas , Probabilidad , ARN Viral/análisis , Factores de Riesgo , Índice de Severidad de la Enfermedad , Distribución por Sexo , Tasa de Supervivencia , Estados UnidosRESUMEN
A growing body of literature indicates that maternal smoking during pregnancy is associated with neurotoxic effects on children. Both animal model studies and human epidemiologic studies demonstrate similar effects in terms of increased activity, decreased attention, and diminished intellectual abilities. Epidemiologic studies also suggest that prenatal tobacco exposure is associated with higher rates of behavior problems and school failure. These findings are explored and their implications for child health policy and practice, and for research, are discussed.