Serum PTX@ concentrations , body mass index ( BMI ) , waist circumference ( WC ) and fat depots , as quantified by dual-energy X-ray absorptiometry and magnetic resonance imaging , were assessed in three community-based cohorts : ULSAM , n = @ , mean age @ years ; PIVUS , n = @ , mean age @ years , women @ % ; and the NORDIET-trial , n = @ , mean age @ years , women @ % .