The association of clot lysis time with total obesity is partly independent from the association of PAI-1 with central obesity in African adults
Abstract Introduction Preliminary evidence indicates that the association of fibrinolytic potential, measured as clot lysis time (CLT), with body composition may differ from that of plasminogen activator inhibitor type-1 (PAI-1). We therefore investigated the association between fibrinolytic markers (plasminogen activator inhibitor type-1 activity (PAI-1 act ) and CLT) and body composition using detailed body composition analyses. Materials and methods Data from 1288 Africans were cross-sectionally analyzed. Body composition analysis included BMI, waist circumference (WC); waist to height ratio (WHtR), skinfolds and body fat percentage measured with air-displacement plethysmography and bioelectrical impedance analysis. Results PAI-1 act and CLT were significantly higher in women than in men, despite adjustment for differences in body composition. PAI-1 act and CLT showed similar linear positive relationships with body composition (BMI, WC, WHtR, skinfolds) in men. In women CLT also showed a linear relationship with body composition, while PAI-1 act levels plateaued at higher BMI and did not differ across skinfold categories. PAI-1 act showed stronger correlations with body composition markers in men than it did in women, while no sex differences existed for CLT. PAI-1 act associated more strongly with central obesity, while CLT associated with total body fat. Conclusions Observed differences may be related to differences in adipose tissue type, distribution and sequence of accumulation between sexes. PAI-1 act is strongly influenced by accumulation of visceral adipose tissue, whereas CLT is associated with obesity independent of type and sequence of body fat accumulation in this African adult study population.