Abstract：Objective To investigate the status and influencing factors of abnormal spinal curvature among middle school students in Zhejiang Province, so as to provide insights into formulating intervention measures of abnormal spinal curvature among students. Methods Middle school students were selected from 90 counties (cities or districts) for abnormal spinal curvature screening using the stratified random cluster sampling method based on the Student Common Diseases and Influencing Factors Program in 2022. Basic information, nutritional status, sedentary time and sleep time were collected through questionnaire surveys and physical examination. Influencing factors for abnormal spinal curvature among middle school students were identified using a multivariable logistic regression model. Results Totally 93 988 students were recruited, and 92 559 students responded effectively, with a response rate of 98.48%. There were 48 578 males (52.48%) and 43 981 females (47.52%). A total of 1 690 students with abnormal spinal curvature were detected, accounting for 1.83%. Multivariable logistic regression analysis showed that the students who were female (OR=1.331, 95%CI: 1.204-1.471), lived in suburb areas (OR=1.254, 95%CI: 1.135-1.385), were at ages of 14 years and above (14 to 16 years, OR=1.252, 95%CI: 1.108-1.414; >16 years, OR=1.273, 95%CI: 1.090-1.486) and had sedentary time greater than 10 h/d (OR=1.162, 95%CI: 1.034-1.305) might have higher risks of abnormal spinal curvature, while the students who were overweight or obesity (OR=0.491, 95%CI: 0.426-0.565), regularly adjust the heights of the desks and chairs (OR=0.883, 95%CI: 0.797-0.979), and slept 8 hours or more per day (OR=0.850, 95%CI: 0.765-0.945) might have lower risks of abnormal spinal curvature. Conclusion The prevalence of abnormal spinal curvature among middle school students in Zhejiang Province is associated with gender, region, age, nutritional status, regularly adjusting the heights of desks and chairs, sedentary time and sleep time.
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