Aims: To examine changes in anthropometric parametersand lipid profiles over a period of 3.6 years in an Iranian adultpopulation according to body mass index (BMI) groups.Methods: Between 1998 and 2001 (phase 1) and 2002 and2005 (phase 2), 5,618 nondiabetic Iranian adults aged 6 20years were examined. Analysis of covariance was used to delineatetrends in anthropometric parameters as well as totaland low- and high-density lipoprotein cholesterol (TC, LDL-Cand HDL-C, respectively) across BMI groups. Results: AlthoughBMI increased in women, this increase was not significantin obese persons. Among the men, however, a significantincrease in BMI was observed only in lean persons.Waist circumference (WC) increased across all BMI groupsin both sexes. A significant decrease was observed in TC[men: –0.83 mmol/l, 95% confidence interval (CI) –1.27 to–0.40; women: –0.78 mmol/l, CI –0.97 to –0.60] and LDL-C(men: –0.63 mmol/l, CI –1.13 to –0.13; women: –0.51 mmol/l,CI –0.78 to –0.24). A significant decrease in mean HDL-Cwas observed only among men (–0.09 mmol/l, CI –0.13to –0.04), with no difference among BMI groups (p = 0.3).There were no significant decreases in TC/HDL-C and LDLC/HDL-C ratios in men or women. Conclusions: Despite an
increase in WC, favorable trends were observed in TC andLDL-C levels. The favorable trend in TC levels was counterbalancedby changes in HDL-C, as reflected by the absence of asignificant decrease in TC/HDL-C or LDL-C/HDL-C
2008. Vol. 53, 13-22 p.