Table 2. Serum levels of vitamin D, magnesium and calcium in all participants .

Variables	Controls		PMS		Odds Ratio (95% CI)	P- value *
	Mean	SD	Mean	SD
Vitamin D (ng/mL)	6.66	3.75	6.84	4.07	0.96 (0.87 – 1.22)	0.817
Mg (mg/dL)	1.98	0.29	1.83	0.23	0.86 (0.72 – 0.93)	0.034
Ca (mg/dL)	9.52	0.38	9.46	0.43	0.81 (0.67 – 0.89)	0.017

Abbreviations: Ca, Calcium; Mg, Magnesium; PMS, premenstrual syndrome. *Mann-Whitney U-test was applied