Table 6. Bivariate Comparisons of Nursing Home and Ambulatory Patient Encounters

	Ambulatory		Nursing Home		P Value
	No.	Mean (SD)	No.	Mean (SD)	P Value
Age^*	2763	56.0 (12.8)	1122	73.1 (14.1)	<.001^{^†}
BMI	2763	33.4 (8.9)	1122	30.4 (9.1)	<.001^{^†}
Vitamin D concentration
Start^*	2763	22.4 (15.1)	1122	32.2 (13.8)	<.001^{^†}
End^*	2763	29.1 (19.8)	1122	34.1 (13.8)	<.001^{^†}
Change	2763	6.7 (21.5)	1122	1.9 (19.8)	<.001^{^†}
Dose^*	2763	3458.2 (3228.7)	1122	3906.6 (3997.8)	.018^{^†}
Creatinine^*	2754	1.17 (0.77)	1122	1.00 (0.62)	<.001^{^†}
Albumin^*	2735	3.8 (0.5)	1118	3.3 (0.5)	<.001^{^†}
Sex^{^‡}
Female	1947 (70.5)		820 (73.1)		.113
Male	813 (29.5)		302 (26.9)

↵* Statistically significant (P < .05).
↵† Comparisons fail to meet the assumption of equal variances.
↵‡ Data for Sex are n (%).
BMI, body mass index; SD, standard deviation.