Author/Authors :
Heidari, Taghi shiraz university of medical sciences - Gastroenterohepatology Research Center, شيراز, ايران , Heidari, Taghi lorestan university of medical sciences - Department of Health, خرمآباد, ايران , Vakili, Mohammad Ali lorestan university of medical sciences - Department of Health, خرمآباد, ايران , Vakili, Mohammad Ali shiraz university of medical sciences - Department of Biostatistics, شيراز, ايران , Emamghorashi, Fatemeh shiraz university of medical sciences - Department of Biostatistics, شيراز, ايران
Abstract :
Objective: Obesity (scaled weight-by-height index) charts of a cohort of 597 healthy infants (391 boys and 206 girls) living in Jahrom (Southern Iran) are presented.Material Methods: An adjusted weight-for-height was used to develop power type obesity indices, Ip=W/Hp. Polynomial modeling was used by applying HRY (Healy, Rasbash, Yang) nonparametric method to estimate age-related smoothed centiles of obesity.Findings: The optimal value of p was found to be 2.5 for girls and 2 for boys. No more than cubic and quadratic polynomials were needed to fit obesity-for-age smoothly for infants. Infant s obesity increases from birth to six months of age and decreases later on to the age of 20 months when it becomes stable.Conclusion: Using age-dependent obesity index (scaled weight by height) is an appropriate index which explores the degree of fatness. A local standard for assessing obesity in clinical practice as well as community health programs in Iran is of urgent need; our data serve this purpose.
Keywords :
Obesity index , Infants , Age , Reference values , Obesity
