An Outbreak of SARS-CoV-2 Omicron Subvariant BA.2.76 in an Outdoor Park - Chongqing Municipality, China, August 2022.

What is already known about this topic?: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron subvariant has a stronger transmission capacity and faster transmission speed than the previous strain. What is added by this report?: The first coronavirus disease 2019 (COVID-19) case infected with the SARS-CoV-2 Omicron subvariant BA.2.76 who caused local transmission was reported in Chongqing Municipality on August 16, 2022. For 35 minutes, the Patient Zero jogged along a lake at a local park without wearing a mask. Among the 2,836 people potentially exposed at the time, 39 tested positive. Overall, 38 out of 39 cases did not wear a mask on the morning of August 16. All 39 cases lacked any previous exposure to the variant before testing positive on their nucleic acid test. What are the implications for public health practice?: It is essential to maintain personal wellbeing by ensuring one maintains personal protection and follows regulated guidelines such as maintaining safe distances from others both indoors and outdoors.

Effects of adolescent peer education psychological resilience of adolescents / 中国学校卫生

Objective@#To verify the effectiveness of adolescent peer education on psychological resilience of adolescents, so as to provide a scientific reference for preventing adolescents physical and mental health problems.@*Methods@#The non equivalent comparison group design method was conducted involving 2 towns which were divided into an intervention group(n=732) and a control group(n=881). The intervention group received 1 year peer education. Their resilience and basic information was assessed by using a adolescent psychological resilience scale and a self-designed basic situation questionnaire.@*Results@#After the intervention, in the control group, target concentration, emotional control, family support, interpersonal assistance, and total psychological resilience were reduced by 0.96, 0.72, 0.63, 1.16 and 3.31, respectively(t=5.75, 3.91, 3.52, 5.86, 6.29, P<0.05); in the intervention group, emotional control, interpersonal assistance, and total psychological resilience were increased by 1.05, 0.54 and 1.72, respectively(t=-4.89, -2.46, -2.76, P<0.05). Multiple linear regression showed that the intervention group s target concentration(B=0.38), emotional control (B=0.85), family support(B=0.29), interpersonal assistance(B=0.83), and total psychological resilience(B=2.40) increased higher than the control group(P<0.05).@*Conclusion@#Adolescent peer education is effective in improving the target concentration, emotional control, family support, interpersonal assistance, and total psychological resilience.

The impacts of multiple obesity-related interventions on quality of life in children and adolescents: a randomized controlled trial.

BACKGROUND AND PURPOSE: Obesity has become a serious public health problem and family- and school-based interventions including physical exercise and diet control have been widely applied to attempt to combat this issue. The purpose of our study was to verify the effectiveness of an obesity-related comprehensive intervention model aimed at improving quality of life (QoL) among adolescents. METHODS: A cluster randomized controlled trial (RCT) was conducted involving 948 subjects who were divided into an intervention group (n = 518) and a control group (n = 430). The intervention group received 1 year of obesity-related health education, physical exercise, and diet control. Their baseline body mass index (BMI) was calculated, and their QoL and basic information were assessed both before and after the intervention period using a self-designed Adolescent Quality of Life Scale and a basic information questionnaire. RESULTS: After the intervention, significant differences in the psychological, social, and pubertal dimensions, and in total QoL (P < 0.05) were observed in the intervention group relative to the control group. Improved psychological QoL in the intervention group was our most robust study finding, with increases in psychological (B = 1.883, SE = 0.646, P = 0.004), pubertal (B = 0.853, SE = 0.296, P = 0.004) and total (B = 3.024, SE = 1.214, P = 0.013) QoL all being higher in this group. This intervention effect was found to be more substantial in boys than in girls. CONCLUSIONS: Family-individual-school-based interventions combining obesity-related health education, physical exercise, and diet control can improve psychological, pubertal, and total QoL in children, with these effects being most pronounced in boys. TRIAL REGISTRATION: retrospectively registered NCT02343588 .

The association between sleep duration, bedtimes, and early pubertal timing among Chinese adolescents: a cross-sectional study.

BACKGROUND AND OBJECTIVE: Early pubertal timing is associated with sleep among Western adolescents, but little is known about this association in Chinese adolescents, especially with regard to the association between bedtimes and early pubertal timing. This paper aimed to identify the association between sleep duration, bedtimes, and early pubertal timing in Chinese adolescents. METHODS: An anonymous cross-sectional survey was conducted among primary and junior middle students (grades 3 to 9) from QiJiang District, ChongQing, China. Participants were recruited by applying stratified cluster sampling. Pubertal timing, sleep duration, and bedtimes were assessed using the Pubertal Development Scale and a self-designed sleep questionnaire. We utilized multivariable logistic linear regression (MLLR) to test the association between sleep duration, bedtimes, and pubertal timing. RESULTS: A total of 5461 adolescents were evaluated, with mean age and BMI values of 11.41 ± 2.05 and 18.03 ± 3.03, respectively, of whom 1257 (23.02%) were in early pubertal timing. In MLLR controlling for age, BMI, family economic status, and other covariates, sufficient sleep (b = - 0.214, P = 0.032, OR = 0.808, 95% CI 0.664-0.982) was negatively related to early pubertal timing, and later bedtime (b = 0.195, P < 0.001, OR = 1.215, 95% CI 1.104-1.338) was positively associated with early pubertal timing. CONCLUSION: Students with early pubertal timing had less sleep duration and later bedtimes, which may be the result of increased stress caused by physical and psychological changes. Therefore, more attention should be paid to pubertal health education for adolescents during puberty. Further longitudinal studies are needed to confirm the causality between sleep and early pubertal timing in Chinese adolescents.

The impacts of peer education based on adolescent health education on the quality of life in adolescents: a randomized controlled trial.

PURPOSE: During adolescence, adolescents are more susceptible to internalizing and externalizing problems influencing quality of life (QoL). The purpose of the study is to verify the effectiveness of a peer education on improving QoL of adolescents. METHODS: A cluster randomized controlled trial (RCT) was conducted involving 1564 subjects who were divided into an intervention group (n = 714) and a control group (n = 850). The intervention group received 1-year peer education. Their QoL and basic information were assessed using a Adolescent Quality of Life Scale and a self-designed basic situation questionnaire. RESULTS: After the intervention, significant increases were found in the psychological, and social, pubertal dimensions, and in total QoL (P < 0.05) in the intervention group relative to the control group. Significant decrease was found in physical dimension (P < 0.05), but the change in the intervention group (0.74 decrease) was much less than that in the control group (1.94 decrease). The improvements of physical (B = 1.215, SE = 0.305, P < 0.001), psychological (B = 1.496, SE = 0.598, P = 0.013), pubertal (B = 0.828, SE = 0.244, P = 0.001), and total (B = 3.455, SE = 1.429, P = 0.016) QoL in the intervention group were higher than in the control group in mixed model. CONCLUSIONS: The peer education based on adolescent health education is effective in improving the physical, psychological, pubertal, and total QoL of adolescents, but no social QoL.

Relationship between adolescent knowledge-attitude-practice and resilience in left-behind children / 中国学校卫生

Objective@#To explore the relationship between adolescent knowledge-attitude-practice(KAP) and resilience in Chinese left-behind children, and provide the basis to develop the adolescent health education.@*Methods@#A total of 1 244 left-behind children from grade 4-9 was investigated through the self-designed Adolescent KAP Questionnaire and Adolescent Resilience Scale.@*Results@#Male and middle school students had better resilence than female and primary school students in left-behind children(t=4.70，4.27，P<0.01); the left-behind children with harmonious relationship between parents, richer family economic status and democratic parenting style obtained greater resilence(F=35.86，31.66，3.25，57.23，P<0.05), and adolescent KAP had positive prediction on target concentration(B=0.11), emotional control(B=0.07), positive cognition(B=0.09), family support(B=0.05), interpersonal assistance(B=0.09) and total resilience(B=0.41) of left-behind children(P<0.01).@*Conclusion@#For left-behind children, adolescent KAP may be have a positive association with resilence and more attention should be paid on adolescent health education.

Internet addiction and its influencing factors among junior high school students in Shapingba District / 预防医学

Objective@#To learn the status of internet addiction and its influencing factors among junior high school students in Shapingba District of Chongqing,providing basis for intervention measures. @*Methods@#From December 2018 to January 2019,all the students in four middle schools in Shapingba District of Chongqing were selected by cluster sampling method,and investigated the status of internet addiction,family background and so on by a designed questionnaire. The influencing factors for internet addiction were analyzed by multivariate logistic regression model.@*Results@#A total of 2 922 questionnaires were sent out and 2 825 valid ones （96.68%） were recovered. The prevalence rate of internet addiction was 9.49% （268 cases）. The Results of multivariate logistic regression analysis showed that senior students （Grade 8,OR=1.764,95%CI：1.284-2.438;Grade 9,OR=1.822,95%CI：1.301-2.561）,living on campus （OR=1.550, 95%CI： 1.170-2.042）,authoritarian parenting style （OR=2.180,95%CI： 1.624-2.914）,neglecting parenting style （OR=3.974,95%CI：2.308-6.619）,watching TV more than two hours per day （OR=1.880,95%CI：1.432-2.458） and unlimited time on watching electronic screen （OR=1.952,95%CI：1.498-2.539） were risk factors for internet addiction. @*Conclusions@#The prevalence rate of internet addiction was 9.49% among junior high school students in Shapingba District. Grade,accommodation,parenting style,time spent daily on watching TV and restriction on watching electronic screen were the influencing factors.

Moderating effect of pubertal knowledge-attitude-practice in relationship between pubertal status and quality of life: a cross-sectional study / 中国学校卫生

Objective@#To explore the relationship between pubertal status, pubertal KAP and adolescents quality of life and the moderating effect of pubertal KAP between pubertal status and quality of life, and to provide a reference for making measures to improve adolescents quality of life.@*Methods@#A descriptive cross-sectional study design which recruited 6 746 adolescents in two districts of Chongqing with cluster sampling was applied. Data was collected by Adolescent Quality of Life Scale developed by our team, Pubertal Development Scale(PDS) from Petersen and Crockett, self-designed KAP questionnaire and basic situation questionnaire.@*Results@#The early puberty, mid-puberty and late puberty suffered lower physical, psychological and total quality of life than the pre-pubertal(P<0.05). The mid-puberty (B=-1.10, P<0.01) and late puberty (B=-2.88, P<0.01) had lower social quality of life than the pre-pubertal Significant difference was not found between pubertal dimension and pubertal status(P>0.05). Pubertal KAP impacted on psychological(B=0.02), social(B=0.04), pubertal(B=0.04) dimensions and total quality of life(B=0.09) positively(P<0.01), but no physical dimension(P=0.06). Moderating effect results revealed that pubertal KAP moderated the negative impact of pubertal status on social dimension (B=0.03, P=0.02) and total quality of life(B=0.06, P=0.01), but no psychological dimension(P>0.05).@*Conclusion@#Promoting puberty health education of adolescents was the key to improving their quality of life.

Application of peer education in mental health education for adolescent primary and middle school students / 中国学校卫生

Objective@#To assess the application effect of peer education in mental health education for adolescent primary and middle school students and to provide evidence for promoting the mental health of adolescent primary and middle school students in application.@*Methods@#The non-randomized controlled trial was performed, 4-5 th grade students of two primary and 7-8 th grade students of two middle schools in a district of Chongqing were chosen as peer-education experimental group, and students in the same grade of another two school were chosen as the blank control group. The Mental Health Inventory of Middle School Students scale and self-made questionnaire were used to exam in mental health status of the subjects before and after intervention.@*Results@#The detection rates after intervention of the mental health, compulsion, paranoia, hostility, interpersonal relationship, depression, anxiety, academic stress, emotional imbalance and psychological imbalance (36.8%, 46.1%, 36.6%, 33.3%, 37.2%, 38.8%, 40.9%, 45.7%, 49.2%, 30.3%) in experimental group were lower than those before intervention (39.9%, 55.3%, 38.8%, 37.9%, 43.9%, 40.5%, 42.7%, 48.0%, 52.5%, 32.1%). The detection rate after intervention of maladjustment(39.8%)was higher than that before intervention(37.7%)(P<0.05). Logistic regression analysis showed that the detection rate after intervention of the mental health, compulsion, paranoia, hostility, interpersonal relationship, depression, anxiety and academic stress status of adolescent primary and middle school students in experimental group was 0.63 times more than the rate of the control group(95%CI=0.49-0.81),0.73(95%CI=0.58-0.91),0.68(95%CI=0.54-0.86),0.71(95%CI=0.56-0.91)(P<0.05).@*Conclusion@#Peer education is an effective measure and method to improve compulsion,paranoia,hostility,interpersonal relationship,depression,anxiety and intervention effect of adolescent primary and middle school students.

[Investigation on the current situation of human soil-borne nematode infection in Shapingba district of Chongqing].

By stratified cluster sampling method, 2 urban and 2 rural fields were selected from Shapingha district of Chongqing for survey in December 2009 to February 2010. According to the Administrating Regulations of National Investigation on Important Human Parasitic Diseases, Kato-Katz method was used to examine human intestinal soil-borne nematode eggs, and adhesive cellophane anal swab method was applied to examine Enterobius infection for children under 12 years old. 203 cases were found positive in 2121 subjects, with an infection rate of 9.6% (203/2 121), and the infection rate of hookworms, Ascaris lumbricoides and Trichuris trichiura with mild infection mostly was 9.3% (197/2 121), 0.4% (8/2 121) and 0.1% (2/2 121), respectively. The rate among people over 50 years old was 15.5% (160/1 030), and the farmers was with 22.3%(113/506). The higher the education level, the lower the infection rate (P < 0.01), and there was a significant difference in the prevalence between urban (2.1%) and rural people (17.3%) (chi2 = 140.443 5, P < 0.01). The infection rate of soil-borne nematodes in Shapingba of Chongqing was much lower than the standard of II regions and most infected subjects were with hookworm infection.