ABSTRACT
Objective To analyze the malnutrition status among children and adolescents of Wa ethnicity in Lincang prefecture,Yunnan province from 2005 to 2014,and to provide evidence for the improvement of the situation.Methods From 2005 to 2014,children and adolescents aged 7 to 18,from 19 primary and secondary schools in Cangyuan county of Lincang prefecture,Yunnan province,were chosen,using the multistage-stratified-random cluster sampling method,to receive physic examination.WHO-2006 standard was used.Situation related to the rate of growth retardation and malnutrition among students was analyzed,from 2005 to 2014.Data was from the National Student Physical Health Research Project.From 2000 to 2014,trends on nutrition development among these students were also studied.Results The rates related to growth retardation among 7-18 years-old Wa boys in 2005,2010 and 2014 were 45.61％,52.36％ and 35.85％,with the rates of thinness as 1.44％,0.76％ and 1.36％,respectively.Rates on malnutrition were 52.35％,56.01％ and 41.13％,respectively.Rates related to growth retardation among 7-18 years-old Wa girls were 42.03％,47.41％ and 33.06％,respectively,with rates of thinness as 0.91％,0.68％ and 0.83％,respectively.The rates on malnutrition were 46.13％,49.77％ and 35.56％,respectively.From year 2005 to 2014,spurt on height growth of boys and girls were among the 13-14 years-old and 9-10 years-old,respectively.Girls were 4 years earlier,entering the sudden increase in the peak age than boys.Sex difference on height among the 18 years-old Wa youngsters were 11.99,9.34 and 11.38 cm in 2005,2010 and 2014,respectively.Conclusion Malnutrition status of retardation on growth among Wa children and adolescents remained quite serious.
ABSTRACT
Objective:To analyze the secular growth trends of the Chinese urban youth from 1979 to 2005,in order to make national intervention strategies and measures to improve their physical fitness and health.Methods:Subjects were sampled from 16 provincial-capital cities in China.They were all Han primary and secondary school students aged 7 to 18 years.The increments of stature,weight and BMI,and the increments per decade of these indicators at different stages were analyzed.Results:In recent 26 years,the overall increments were 6.5 and 4.7 cm for stature,and 8.9 and 5.2 kg for weight,for boys and girls,respectively.Swiftest rates were found in the period of 1985-1995,with the increments which were as high as 3.8 and 3.0 cm/decade for height,and 4.7 and 3.1 kg/decade for weight,for boys and girls respectively.These trends are still strong at present,without any tendency of going to the plateau.Advanced puberty plays the most contributing role in these trends,with the peak height rates being 2.4 cm/decade for girls at the age of 12 and 3.3 cm/decade for boys at the age of 14,respectively.The increments of adult height were 3.2 and 2.1 cm,while the rates were 1.2 and 0.8 cm/decade,for males and females,respectively.The distributing curves of BMI show an accelerating tendency of going to the right side,which suggests that the prevalence of childhood obesity is increasing rapidly.Conclusion:China is now experiencing an overall and positive secular trend,which is reflected not only by the accelerating physical growth in childhood,advanced puberty,and steady increments of adult height,but also by the dramatic changes of body shape.We should not only feel proud of the achievements of these secular growth changes and the active socioeconomic influences,but also pay much attention to their negative effects,especially those that may induce the dangers of hypertension,hyperglycemia,type 2 diabetes mellitus and other adulthood diseases,as well as the disease risks of metabolic syndrome that may even occur early in childhood and adolescence.