Impact of vitamin D status and obesity on C-reactive protein in kidney-transplant patients
Abstract
We examined whether vitamin D status and obesity are associated with low-grade systemic inflammation, as assessed by serum concentrations of C-reactive protein (CRP) in an adult population of kidney-transplant patients. This was a single-center, cross-sectional study. Data were collected between December 2005 and April 2006 from 161 adult (aged >18 years) kidney-transplant patients (mean age, 53.1 years; SD, 11.5 years; females/males, 78/83), with a median kidney-graft age of 7.0 years and serum CRP levels < or =10 mg/L. Vitamin D status was assessed by serum concentrations of 25-hydroxyvitamin D (25-OHD) and 1,25-dihydroxyvitamin D (1,25(OH)(2)D). The presence of low-grade systemic inflammation was assessed by serum CRP. Selected lifestyle factors and anthropometric variables were determined in a subgroup of patients (n = 90). Bivariate correlation and multiple regression analyses were performed. Hypovitaminosis D (ie, S-25-OHD < or =75 nmol/L) was present in 73% of females, and 89% of males. The median level of serum CRP was 1.7 mg/L. Vitamin D status was not significantly associated with serum CRP. In the patient subgroup, indices of obesity (body mass index, body weight, and fat mass) correlated positively, and lean body ma...Continue Reading
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