Vitamin D status before Roux-en-Y and efficacy of prophylactic and therapeutic doses of vitamin D in patients after Roux-en-Y gastric bypass surgery.
BACKGROUND
Literature regarding the effect of Roux-en-Y gastric bypass (RYGBP) on vitamin D level shows contradictory findings. Our goal was to determine preoperatively vitamin D levels, to evaluate the efficacy of therapeutic and prophylactic doses of vitamin D and to assess the relationship of 25-OH vitamin D level and body mass index (BMI).


METHODS
We conducted a retrospective cross-sectional study of 72 patients who underwent RYGBP from April 2007 to October 2007 in Bariatric Surgery Department at Saint Vincent Charity Hospital.


RESULTS
Our study demonstrated that 80% of the obese patients undergoing RYGBP had serum 25-OH vitamin D levels of less than 32 ng/ml. Postoperative data show that 45% of these patients continue being vitamin D insufficient despite the treatment. We demonstrated that a statistically significant inverse correlation between BMI and 25-OH vitamin D levels (r = 0.464, p = 0.01) exists.


CONCLUSIONS
Our finding strongly supports the need for aggressive monitoring of vitamin D levels for long-term prevention of complications of vitamin D deficiency in gastric bypass patients. Identifying the factors that predict patient's responses to vitamin D supplementation requires larger-scale studies and further analysis of these tendencies suggested by our findings.
Mahlay
Natalia Fendrikova
NF
Saint Vincent Charity Hospital, 2351 East 22nd St., Cleveland, OH, 44115, USA.
Verka
Lisena G
LG
Thomsen
Kimberly
K
Merugu
Srinivas
S
Salomone
Mark
M
D000328:Adult; D015992:Body Mass Index; D015331:Cohort Studies; D004334:Drug Administration Schedule; D005260:Female; D015390:Gastric Bypass / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000097:blood* / Q000150:complications / Q000601:surgery; D011292:Premedication; D012189:Retrospective Studies; D016896:Treatment Outcome; D014807:Vitamin D / Q000008:administration & dosage* / Q000097:blood; D014808:Vitamin D Deficiency / Q000097:blood / Q000453:epidemiology* / Q000517:prevention & control*; D014815:Vitamins / Q000008:administration & dosage*; D015431:Weight Loss
D014815:Vitamins; D014807:Vitamin D