| Summary: | 碩士 === 亞洲大學 === 健康產業管理學系長期照護組 在職專班 === 99 === Objective: The objective of this study was to examine the prevalence of underweight and overweight or obesity in elementary schoolchildren and investigate the trend of anthropometric change through the years and its influence factors.
Methods: The study was a cross-sectional study including a sample of 1673 elementary schoolchildren, aged 6 to 11 years in Changhua country. Anthropometric parameters such as Body weight, height, and waist circumference (WC) were measured using standard procedures. Underweight, overweight and obesity were based on the recommendation by Department of Health Executive Yuan Taiwan, using aged -and gender-specific BMI values. Sex-specific descriptive statistics for whole-year age groups and percentile curves of height, weight, BMI, weight for length index (WLI), WC and waist-to-height ratio (WHtR) were derived and presented. Statistical analyses were performed with SPSS 12.0. Inter-correlations between BMI and WC as well as WHtR were assessed using Pearson correlation coefficients. Personal data and policies variables were using multinomial logistic regression.
Results: Girls and boys had an average of 6.4cm, or 5.0% increase in height, and 6.4 kg, 7.1 kg , or 24.3 % and 26.9 % increase in weight when compared to data of nationwide survey in 1986-1988. Compared to the data of nationwide survey in 1993-1996, our girls and boys would have similar height but weight have averaged 8.1 % and 9.1 % heavier. However, the girls and boys in our study would have similar height and weight with nationwide survey in 2005-2006. The overall prevalence of overweight, obesity and underweight were 13.0%,14.0% and 20.9% respectively. Also the prevalence of overweight, obesity and underweight among girls were 12.8 %, 11.7% and 21.0 %; among boys were 13.1%,16.0% and 20.7% respectively. The WC increased with age, but WHtR decreased with age from 6 to 9 years and than increased from 10 to 11 years. WC correlated more closely than WHtR with BMI（r =0.88, 0.82; P<0.01）.
Conclusion: Both sexes had softened growth in height within recent 16 years. Boys had significantly higher weight , WLI, BMI, WC, WHtR than girls. Prevalence of obesity and underweight is higher than nationwide survey in 1986 to 2005. Reference values and percentile curves for height, weight, BMI,WC and WHtR of Changhua country schoolchildren are provided.
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