Table 1.

Mean change in serum vitamin D after four types of replacement therapies.

	Serum vitamin D ng/ml-Changes (after the first dose)					Difference in mean compared to the reference	Effect size (Cohen's d) compared to the reference	P value for difference in mean compared to the reference
	Range	Mean	SD	SE	N	category	category	category
Type of vitamin D prescribed
vitamin D2 injection	(-16 to 50)	3.2	0.51	0.33	411	Reference
vitamin D3 injection	(-17 to 48)	9.3	0.69	0.49	454	6.1	0.69	< 0.001
vitamin D2 injection + D2 tablet	(-18 to 47)	5.5	0.32	0.18	1585	2.3	0.32	< 0.001
vitamin D3 injection + D2 tablet	(-18 to 47)	8.8	0.94	0.27	997	5.6	0.94	< 0.001

P (ANOVA) <  0.001

P (Paired t-test) for each of the four treatments < 0.001