[Analysis on physical and mental health and related influential factors among those 'left behind' adolescents in Anhui province]

To explore the physical and mental health status on the 'left behind' students in Anhui province and the related influential factors.Stratified cluster sampling method was used to investigate the 682 out of 3421 students from 7 middle schools in both south and north Anhui province, using multidimensional sub-health questionnaire of adolescents (MSQA) and mental health test (MHT), for assessment of the general condition, physical and mental health status.14.22% of the 'left behind' students were in sub-health condition compared to 11.28% among the normal students, and the mental sub-health status represented 13.64% for the former and 10.84% for the latter. In addition, the 'left behind' students appeared less content with their life than those of staying with their parents (P0.05). MHT scores in the subjects were positively correlated with the scores on MSQA and showed significant difference (P0.01).from the multiple linear regression analysis showed that the mental health condition among the left behind students was in linear regression relationship with the decreased physical activity (β = 1.456, P = 0.001), emotional problems (β = 1.096, P = 0.000) and problems of social adaptation (β = 1.011, P = 0.006). The status of physical sub-health in the Anhui province showed that there was no significant difference in each of the study group (P0.05).Decreased physical activity and emotion aporia as well as difficult social adaptation were major factors leading to degenerated mental health levels in the 'left-behind' adolescents. The findings suggested that the mental health status could be improved in this population through better management on their body-health condition.