Parathyroid hormone, but not vitamin D, is associated with the metabolic syndrome in morbidly obese women and men: a cross-sectional study

Table 3 Odds for prevalent metabolic syndrome according to levels of PTH, 25(OH)D and magnesium adjusted for confounding factors

Explanatory variables	Model 1		Model 2		Model 3
Explanatory variables	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P
PTH	1.69 (1.12–2.56)	0.013	2.25 (1.34–3.78)	0.002	2.62 (1.52–4.53)	0.001
25(OH)D	0.86 (0.62–1.20)	0.383	0.96 (0.65–1.44)	0.860	1.06 (0.69–1.63)	0.783
Magnesium	0.02 (0.00–0.15)	<0.001	0.04 (0.00–0.47)	0.010	0.22 (0.02–2.54)	0.224

Model 1. Explanatory variables in the multiple logistic regression model were PTH (ln), 25(OH)D (ln), magnesium, calcium, phosphate, and creatinine.
Model 2. Explanatory variables as in model 1 plus age, gender, season, BMI, current smoking, albuminuria, CRP. and HOMA-IR.
Model 3. Explanatory variables as in model 2 plus type 2 diabetes (yes/no).

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