[Gender differences in cluster pattern of health-risk behaviors among rural middle school students in Tujia-Miao Autonomous Prefecture of Xiangxi]

To investigate the gender differences in cluster pattern of health risk behaviors among rural middle school students in Tujia-Miao Autonomous Prefecture of Xiangxi.By the method of layered, random and total sampling, questionnaire survey about dietary bias, smoking, alcohol drinking, suicidal ideation, internet addiction and non-secure swimming was taken to 1974 students of eight middle schools from rural areas in four counties of Tujia-Miao Autonomous Prefecture of Xiangxi, Hunan Province in 2014. In 11 kinds of health risk behaviors as the clustering index, first by using the hierarchical clusteringmethod for male and female students were clusteranalysis, determine the optimal cluster number of male and female students were 4 class, then the two step cluster analysis, get the male and female students in 4 types of dangerous behavior clustering patterns of group characteristics.Among the survey of 896 boys and 1078 girls, the boys in the low risk group were composed of 262 people, the ratio was 29. 2%, the girls were composed of 215 people, the ratio was 19. 9%; the boys in the lower risk group were composed of 268 people, the ratio was 29. 9%, the girls were composed of 365 people, the ratio was 33. 9%; the boys with highest incidence of drinking in the moderate risk group were composed of 217 people, the ratio was 24. 2%, the girls with highest incidence of lonely were composed of 264 people, the ratio was24. 5%; the boys in the highest risk group were composed of 149 people, the ratio was16. 6%, the girls were composed of 234 people, the ratio was 21. 7%. In the moderate risk group, boys with highest incidence of drinking( 97. 7%) were always accompanied with behaviors like smoking( 67. 3%), fighting( 63. 6%), non-secure swimming( 66. 4%); girls with highest incidence of lonely( 45. 1%) in the moderate risk group also had behaviors like partial eclipse( 65. 2%), pedestrian violation( 50. 4%) and the like. The total boys and 92. 7% of girls have more than 4 kinds of health-risk behaviors in highest risk group.There were gender differences in risk behaviors among middle school students in rural areas of Xiangxi Autonomous Perfecture. Among them, the boys in moderate risk group were marked by drinking, the girls were marked by lonely. The highest risk group had a high rate of risky behaviors, showing a high degree of aggregation of "explicit problem behaviors and implicit behaviors".