Table 2.

Partial correlations of baseline serum and muscle-related measurements

		25(OH)D (N=318)1				1,25(OH)2D (N=318)1				iPTH (N=318)1
		Unadjusted		Adjusted		Unadjusted		Adjusted		Unadjusted		Adjusted
Variable2	N	r	P	r	P	r	P	r	P	r	P	r	P
Fat-Free Soft Tissue (kg)	320	−0.12	0.038	−0.02	0.826	0.12	0.037	0.10	0.130	0.12	0.037	0.15	0.030
Handgrip Strength (kg)	303	−0.21	<0.001	0.04	0.602	0.14	0.019	0.12	0.083	0.21	0.001	0.07	0.25
Forearm MCSA (mm2)	321	−0.32	<0.01	−0.02	0.826	0.13	0.028	0.12	0.270	0.23	<0.001	0.15	0.022
Forearm MD (mg/cm3)	321	0.34	<0.001	0.09	0.166	−0.04	0.509	−0.03	0.620	−0.12	0.034	<0.01	0.99
Forearm IMAT (mm2)	297	−0.33	<0.001	−0.04	0.517	0.10	0.101	0.04	0.529	0.13	0.034	0.07	0.314
Calf MCSA (mm2)	317	−0.13	0.026	−0.06	0.356	0.12	0.040	0.08	0.233	0.18	0.001	0.12	0.066
Calf MD (mg/cm3)	318	0.39	<0.01	0.11	0.103	0.01	0.934	<0.01	0.948	−0.16	0.006	−<0.01	0.962
Calf IMAT (mm2)	308	−0.21	<0.01	−0.08	0.230	0.12	0.045	0.06	0.349	0.13	0.030	0.07	0.268

^1.Partial correlations of unadjusted and adjusted (for race, sex, age, and latitude, N=223) between vitamin D metabolites and muscle-related outcomes. Statistically significant if P ≤ 0.05 and in bold font. Partial Correlation Coefficient (r) displays strength of correlation. MCSA, muscle cross-sectional area; MD, muscle density; IMAT, intermuscular adipose tissue