Table 3.

Multiple linear regression model and the changes in serum vitamin D after treatment as the dependent (outcome) variable and the treatment type, gender, age, and history of selected chronic conditions as the explanatory variables.

	Unstandardized regression Coefficient (B)
	estimate	95% confidence interval	P	Standardized Coefficients
(Constant)	3.5	(2.6 to 4.5)	< 0.001
vitamin D3 (Cholecalciferol) injection compared to vitamin D2 injection	6.2	(5.2 to 7.3)	< 0.001	0.25
Combined (Cholecalciferol) injection [D3] + D2 tablet) compared to vitamin D2 injection	5.7	(4.8 to 6.6)	< 0.001	0.31
Combined (Ergocalciferol) injection [D2] + D2 tablet) compared to vitamin D2 injection	2.4	(1.5 to 3.2)	< 0.001	0.14
Male gender compared to female	1.3	(0.6 to 1.9)	< 0.001	0.07
History of Diabetes Mellitus	− 1.3	( − 2.1 to − 0.5)	< 0.001	− 0.06
History of Dyslipidemia	− 1.5	( − 2.2 to -0.7)	< 0.001	− 0.07
History of Asthma / Chronic Obstructive Pulmonary Disease	− 0.9	( − 1.7 to − 0.1)	0.036	− 0.03
History of Hypertension	− 0.7	( − 1.6 to 0.2)	0.13[NS]	− 0.03
History of Cerebrovascular Disorder	− 1.2	( − 3.4 to 1.1)	0.31[NS]	− 0.02
History of Chronic Kidney Disease	1.7	( − 1.5 to 4.9)	0.29[NS]	0.02
Age group (years)	− 0.01	( − 0.3 to 0.3)	0.98[NS]	− 0.001

P (model) <  0.001

Determination coefficient (R²) = 0.076