Effects of native vitamin D supplementation on vitamin D status and body composition after sleeve gastrectomy: A retrospective study in Japanese patients.

In univariate analysis, 12-month/baseline ratio of lower limb skeletal muscle had a significant negative correlation with change in body weight (r = −0.446, p < 0.05), change in SFA (r = −0.514, p < 0.05), and change in 25OHD (r = −0.469, p < 0.05); and while it also showed a trend of association with change in BMI, change in VFA, and protein to energy ratio (12-month average), there was no statistical significance.

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The PTH intact level showed a decreasing trend (−3.0 ​pg/mL) in the supplementation group, while there was no significant change in the control group (+2.0 ​pg/mL), and the change in PTH intact was not significantly different between the two groups ( Table 2 ). 3.3.

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