关键词: 特发性脊柱侧弯, 裸眼视力, 肺活量, 学习时长, 运动时长

Abstract: Objective To investigate the current status of adolescent idiopathic scoliosis (AIS), height growth, visual development and spirometry in children aged 6 - 12 years in Chengdu, Sichuan Province, and to explore the significance of these indicators in the development of AIS in children.Methods Children in all grades of five elementary schools in Chengdu were screened for AIS in 2019. The screening methods included visual physical examination, anterior flexion test and spine measuring tape measurement. Meanwhile, adolescents' bare eye visual acuity levels and spirometry were measured, and questionnaires were administered on their height changes, daily study and exercise hours over the past 1 to 3 years. Then children were grouped according to the screening results, and were divided into different subgroups according to their age. The differences and correlations of the indicators in each group were analyzed.Results Among the 963 children, a total of 928 agreed to undergo AIS screening, including 63(6.79%)positive Adams tests(male-to-female prevalence ratio 1∶6). And 23(2.48%) cases were positive for AIS. Compared with children in the AIS-negative group, children in the AIS-positive group had significantly lower spirometry and reduced daily exercise time (t=2.088, 2.104, P<0.05). Children were divided into three subgroups according to their age groups:6-7 years old, 8-9 years old, and 10 - 12 years old. Compared with the AIS-negative group, slower increase of stature was found in children of positive group aged 6 to 7 years over the last 3 years and children aged 8 to 9 years over the last 1 and 2 years, and reduced exercise time in children aged 10 to 12 years(t=0.691, 4.176, 4.246, 5.788, P<0.05). Pearson correlation analysis showed that positive correlations existed in the increase of stature over the past 1, 2 and 3 years for children in the AIS positive group (r=0.920, 0.830, 0.813, P<0.001), and the increase of stature was negatively related to everyday exercise time(r=-0.521, -0.533, -0.536, P<0.05).And a positive correlation between spirometry and age was also found in children in the AIS positive group (r=0.512, P<0.05). For children in the AIS negative group, positive correlations existed in the increase of stature over the past 1, 2 and 3 years for children in the AIS positive group (r=0.827, 0.765, 0.855, P< 0.001), the increase of stature was negatively related to age(r=-0.109, -0.112, -0.086, P<0.05), and spirometry was related to age and exercise time(r=0.595, 0.148, P<0.001).Conclusions The development and progression of AIS is negatively correlated withexercise duration. Prolonging the exercise duration, enhancing exercise capacity and lung capacity may reduce the incidence of AIS in children.

Key words: idiopathic scoliosis, uncorrected visual acuity level, lung capacity, study time, exercise duration