Absence of association between vitamin D deficiency and incident metabolic syndrome: Tehran Lipid and Glucose Study.

Background: Links between vitamin D status and metabolic syndrome have been reported in cross-sectional studies; however, few prospective studies regarding this association exist. We performed this study to assess prospective association between vitamin D status and incident metabolic syndrome in a large population-based cohort.

Method: This was a nested case-control study within the Tehran Lipid and Glucose Study (TLGS) which followed representative Tehranian adults.

Associations between vitamin D and cardiovascular outcomes; Tehran Lipid and Glucose Study.

Background: Vitamin D status seems to have an association with cardiometabolic risk factors and its deficiency may negatively affect the cardiovascular outcomes. The aim of this study was to determine the possible association between vitamin D status and cardiovascular outcomes.

Method: We performed a nested case control study within the Tehran Lipid and Glucose Study (TLGS), which followed a representative sample of Tehranian adults.

Trends of obesity and abdominal obesity in Tehranian adults: a cohort study.

Background: Considering the increasing trend of obesity reported in current data, this study was conducted to examine trends of obesity and abdominal obesity among Tehranian adults during a median follow-up of 6.6 years.

Methods: Height and weight of 4,402 adults, aged 20 years and over, participants of the Tehran Lipid and Glucose Study (TLGS), were measured in 1999-2001(phase I) and again in 2002-2005(phase II) and 2006-2008 (phase III).