Table 1.

Baseline demographic, anthropometric and clinical data of episodic migraine patients in a randomized controlled trial of vitamin D vs. placebo

		Vitamin D (n = 40)	Placebo (n = 40)	P valuea
Age (year)		37 (8)	38 (12)	0.819
Headache Onset years (year)		12 (8)	11 (8)	0.679
Body mass index (kg/m2)		25.83 (4.07)	25.36 (4.29)	0.613
Sex	Female	32 (80.0%)	32 (80.0%)	1.000
	Male	8 (20.0%)	8 (20.0%)

Values are expressed as mean (standard deviation (SD)) or number (%) as appropriate

^aUsing either Independent t test or Chi square according to the type of data

This data are identical to our previously reported data [10, 31]