Associations of physical activity and screen time with adolescent idiopathic scoliosis.

BACKGROUND: Adolescent idiopathic scoliosis (AIS) is the most common type of idiopathic scoliosis, affecting approximately 0.61%-6.15% adolescents worldwide. To date, the results on the relationship between moderate-to-vigorous physical activity (MVPA) and AIS were inconsistent, and the association between screen time (ST) and AIS remained unclear. This study aimed to describe MVPA and ST among adolescents, and to explore the independent and joint associations between PA, ST, and AIS. METHODS: A frequency-matched case-control study based on the 2021 Chinese School-based Scoliosis Screening Program in Shenzhen city, south China, was conducted. The research involved 494 AIS patients (aged 9-17 years) and 994 sex- and age-matched healthy controls. MVPA and ST were measured using a self-administered questionnaire. Logistic regression models estimated associations between PA, ST, and AIS. RESULTS: Compared to subjects meeting the recommended 60-min daily of MVPA, adolescents reporting daily MVPA time less than 60 min had 1.76 times higher odds of experiencing AIS (95% CI: 1.32-2.35) and adolescents reporting daily MVPA in inactive status had 2.14 times higher odds of experiencing AIS (95% CI: 1.51-3.03). Moreover, participants reporting ST for 2 hours or more had 3.40 times higher odds of AIS compared with those reporting ST less than 2 hours (95% CI: 2.35-4.93). When compared with the adolescents reporting both ST and MVPA meeting the guidelines recommended times (ST < 2 h and MVPA ≥ 60 min/day), those reporting both ST ≥ 2 h and MVPA in inactive status are 8.84 times more likely to develop AIS (95% CI: 3.99-19.61). CONCLUSIONS: This study reported that the insufficient MVPA, especially MVPA in inactive status, and excessive ST were risk factors for AIS. Additionally, the joint effects of insufficient MVPA and excessive ST probably increase the risk of AIS.

Academic-related factors and daily lifestyle habits associated with adolescent idiopathic scoliosis: a case-control study.

BACKGROUND: Adolescent idiopathic scoliosis (AIS) is the most prevalent spinal deformity, which may have long-term negative consequences on adolescents. The research on the etiology is of great importance for identifying high-risk population and formulate tailored prevention. This study aimed to evaluate the association between academic-related factors and daily lifestyle habits and AIS. METHODS: In this population-based case-control study, 491 AIS cases and 1,346 healthy controls that frequency-matched by age and sex were recruited in Shenzhen, Southern China. AIS was diagnosed as a Cobb angle ≥ 10° on standing posteroanterior radiographs of the whole spine. The academic-related factors (e.g., reading and writing posture) and daily lifestyle habits (e.g., intake of milk and dairy products) were collected by a self-reported questionnaire. The logistic regression analysis was performed. RESULTS: After adjusting for potential confounding factors, multivariable logistic regression models demonstrated that academic-related factors were associated with AIS. Individuals with poor reading and writing posture were more likely to have AIS (AOR: 2.06, 95%CI: 1.58-2.68). Moreover, there was a significant association between heavy school bags and AIS (AOR: 2.22, 95%CI: 1.50-3.31). Additionally, adolescents who reported daily screen time on weekdays over 2 hours were more likely to develop AIS (P < 0.001). Regarding daily lifestyle habits, individuals without the habit of taking milk and dairy products had a higher risk of developing AIS (AOR: 1.87, 95%CI: 1.29-2.71). CONCLUSIONS: Academic-related factors and daily lifestyle habits were associated with AIS among Chinese adolescents. Schools, families, and related facilities are recommended to take actions on developing effective prevention and management strategies that integrates "Student-Family-School-Education-Health-Sports" for AIS.

Association between bullying victimization, coping style, and mental health problems among Chinese adolescents.

BACKGROUND: This study aimed to examine the association of bullying victimization with anxiety and depressive symptoms among Chinese adolescents and explored the role of coping styles in the foregoing associations. METHOD: Data were drawn from the 2019 School-based Chinses Adolescents Health Survey (n = 19,809). Information about bullying victimization, coping styles, anxiety symptoms, and depressive symptoms were measured. Linear mixed-effects models were performed. RESULTS: After adjusting for covariates, verbal victimization (ß = 1.94 for anxiety symptoms; ß = 4.62 for depressive symptoms), relational victimization (ß = 3.40 for anxiety symptoms; ß = 8.37 for depressive symptoms), physical victimization (ß = 2.63 for anxiety symptoms; ß = 6.07 for depressive symptoms) and cyber victimization (ß = 4.68 for anxiety symptoms; ß = 10.72 for depressive symptoms) were associated with anxiety and depressive symptoms. Moreover, the severity of anxiety and depressive symptoms tended to increase with the number of victimization types. The interaction effects between bullying victimization and coping style on anxiety and depressive symptoms were significant. Further stratified analyses by coping styles indicated that the association of relational and cyber victimization on anxiety and depressive symptoms were significantly stronger in adolescents with negative coping style than in those with positive coping style. LIMITATIONS: Causal inference is limited due to the cross-sectional design. CONCLUSION: Bullying victimization is associated with anxiety and depressive symptoms, and coping styles may play a moderate role in these associations. Interventions to promote mental health could focus on developing positive coping styles, particularly among adolescents with bullying victimization.