Comparative Study On Students Constitution And Health Of Han Nationality In Lanzhou Qilihe Urban Area Aged From 7 To 17 In 2002 And 2009

Objective Analyze the variation of the body height, weight, chest circumference and body proportions as well as the prevalence of overweight, obesity, low eyesight and dental caries of the children and teenager aged from 7 to 17 in Lanzhou Qilihe urban area between 2002 and 2009. To provide the scientific evidence for improving the physical constitution, health promotion and enhancing school health care of the district.Methods Physical examination were performed in every primary and secondary schools in Lanzhou Qilihe urban area in 2002 and 2009. Children were 7 to 17 years old in the studies. Physical examination was made for every student in school. The content was:(1)Body height, weight and chest circumference were measured; (2) Eyesight was examine by visual chart; (3) Every tooth was checked up using probe and stomatoscope, and then calculated dental, miss, full (D,M,F) teeth.All analyses were performed by SPSS and EXCEL software.Results (1) Compare with 2002, the body height, weight, chest circumference of the students have persistently increased aged from 7 to 17 in 2009. The average height increases 2.71cm and 2.24cm respectively of the male and female students, the average weight rises 3.88kg and 2.99kg respectively of the male and female students, and chest circumference adds 1.29cm and 1.75cm respectively of the male and female students. (2) The twice cross phenomenon in height curve and chest circumference curve are observed in 2002 and 2009. The height of male students is rising obviously aged from 7 to 14. The height of female students is rising obviously aged from 7 to 12 years old. It is unobserved of cross phenomenon in weight curve. (3) The distributing curves of BMI of each age group aged from 7 to 17 show an accelerating tendency of going to the right side in 2009. compare with 2002. It has a little rise in P5, P15 percentile, and more ascend in P50, P75 percentile. Swift and violent increase is observed in P85 and P95 percentile. (4) The relevance ratio of overweight and obesity in 2009 is higher than 2002 (P<0.01); and it is more of male students than female (P<0.01). (5) The relevance ratio of low vision in 2009 is higher than 2002 (P<0.01), more great of male student than female and goes up with students growing. (6) The prevalence of caries is lower in 2009 than in 2002. The prevalence of caries is reducing by students growing.Conclusion (1) The students are now experiencing a positive secular growth trend. (2) The distributing curves of BMI show an accelerating tendency of going to the right side in 2009,compared with 2002. The overweight and obesity prevalence of the childhood and teenager is increasing rapidly. The relevance ratio of overweight and obesity aged from 7 to 12 is higher than others, especially male students. (3) The relevance ratio of low vision is increased rapidly in 2009 compared with 2002. And rising by the students growing. The relevance ratio of low vision is droped obviously in 13 years old. The ascended extent to the relevance rate in female students were larger than that of male. (4) The caries incidence is lower in 2009 than in 2002. And it is reducing by students growing.Suggestion Enhancing the monitor and analysis of obesity screening and BMI curve is the important target of the job in the future in the primary and secondary students,especially the primary students. We should keep on controlling and preventing school disease(low sight, dental tooth et al).