Platelet number is negatively and independently associated with carotid intima-media thickness in apparently healthy overweight/obese subjects
2018
De Pergola, G. | Zupo, R. | Cecere, A. | Bartolomeo, N. | Triggiani, V. | Paradiso, S. | Lampignano, L. | Silvestris, F. | Ciccone, M.M.
A significant change of platelet number may be a risk factor for atherosclerotic cardiovascular disease. The aim of this study was to investigate the association between platelet number and early signs of atherosclerosis, evaluated by carotid intima-media thickness (c-IMT), in a apparently healthy population mainly represented by obese subjects.As many as 961 subjects, 686 women and 275 men, aged between 18 and 74 years, were enrolled in the study. Of these, 54 individuals (5.6% of all subjects) were normal weight, 259 individuals (27.0% of all subjects) were overweight, and 648 individuals (67.4% of all subjects) were obese. Waist circumference (WC) and blood glucose, insulin, total cholesterol, high and low density lipoprotein cholesterol, triglycerides and platelet count were also detected in all subjects, who underwent carotid echo color doppler ultrasound to measure c-IMT.c-IMT was significantly and positively associated to age (r = 0.204, P < 0.0001), fasting glucose (r = 0.073, P < 0.0240), total cholesterol (r = 0.096, P = 0.0031), and systolic and diastolic blood pressure (r = 0.140, P < 0.0001 and r = 0.119, P < 0.0003 respectively); c-IMT was significantly and negatively correlated with platelet count (r = −0.165, P < 0.0001). Only age (P < 0.0001) and systolic blood pressure (P = 0.0393), positively, and platelet number (P < 0.0001), negatively, were significantly and independently associated to c-IMT in a final multiple regression analysis.Lower platelet number represented an independent determinant of c-IMT in a population, mainly represented by obese patients. These results suggest that a decrease of platelet number may well be an early defensive mechanism in subjects developing the thickening of carotid artery.
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