Low Vitamin D in Candidates for Bariatric Surgery: Are the Americans Better Off than the French?
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Bart Van der Schueren & Nicole Green & Prakash Gorroochurn & Julio Teixeira & Sinan Altiner & Blandine Laferrère
- چاپ و سال / کشور: 2011
Description
We read with interest the article by Dr. Ducloux and colleagues in which the authors demonstrate that 96% of patients presenting for bariatric surgery in France are vitamin D deficient [1]. We recently conducted a study in 340 morbidly obese patients presenting for bariatric surgery at the Center of Minimally Invasive Surgery at St. Luke’s- Roosevelt Hospital in New York. Only 65% of the NY patients were vitamin D deficient using the same cutoff point of 50 nmol/L, and their mean vitamin D level was substantially higher compared to that of patients in France (47±26 nmol/L versus 31±13 nmol/L). The NY patients were ethnically diverse with 43% Hispanics, 30% African–Americans, and 27% Caucasians. In contrast with Ducloux et al., we found differences in vitamin D levels between ethnic groups (P<0.001, ANOVA with Tukey’s post hoc tests). African–Americans had lower levels of vitamin D (39±17 nmol/L) than both Caucasians (55±25 nmol/L, P<0.001) and Hispanics (49± 30 nmol/L, P=0.006). In addition, vitamin D levels were negatively correlated with BMI (P=0.017, r=−0.130) and strongly associated with ethnicity. Only 24% of African– Americans presenting for bariatric surgery had vitamin D levels≥50 nmol/L, versus 34% of Hispanics and 48% of Caucasians (P<0.001 by the chi-square test). In Ducloux’s patients, the absence of associations between ethnicity, BMI, and vitamin D levels may be due to the small number of patients studied (n=50). One can only speculate why the vitamin D levels are substantially lower in the Parisian French than in American patients [2]. Sun exposure may have been different between the two independently studied cohorts; however, this was found not to be an important factor in Ducloux’s and Goldner’s studies.
OBES SURG (2011) 21:948–949 DOI 10.1007/s11695-011-0439-5 Published online: 13 May 2011
