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.