Table 4. Regression Coefficients Predicting Change in Serum 25-Hydroxyvitamin D Concentration: Full and Reduced Models for All Patients and All 3885 Observations

	B	P Value	95% Confidence Interval
	B	P Value	Lower	Upper
Full model
Age	0.092	<.001^*	0.05	0.13
Sex	0.647	.269	−0.50	1.8
BMI	−0.200	<.001^*	−0.26	−0.14
Nursing Home	1.390	.057	−0.04	2.82
Albumin	1.457	.013^*	0.28	2.44
Creatinine	−0.462	.209	−1.18	0.26
Dose of vitamin D	0.002	<.001^*	0.002	0.002
Starting vitamin D	−0.615	<.001^*	−0.65	−0.58
Constant	7.838	.008^*	2.02	13.66
Reduced model
Age	0.074	<.001^*	0.04	0.11
BMI	−0.202	<.001^*	−0.26	−0.14
Albumin	1.739	.001^*	0.73	2.75
Dose of vitamin D	0.002	<.001^*	0.002	0.002
Starting vitamin D	−0.622	<.001^*	−0.66	−0.59
Constant	8.521	.003^*	2.86	14.18

↵* Statistically significant (P < .05).
BMI, body mass index.