Table 4.

Partial correlation of 12-week change in serum and muscle-related outcomes

		25(OH)D (N=302)1				1,25(OH)2D (N=302)1				iPTH (N=302)1
		Unadjusted		Adjusted		Unadjusted		Adjusted		Unadjusted		Adjusted
ΔMuscle Outcomes2	N	r	P	r	P	r	P	r	P	r	P	r	P
Fat-Free Soft Tissue (kg)	300	−0.04	0.564	−0.03	0.688	<0.01	0.975	0.03	0.718	<0.01	0.975	0.10	0.231
Handgrip Strength (kg)	285	0.04	0.585	0.02	0.841	0.07	0.270	0.10	0.214	0.05	0.439	<0.01	0.956
Forearm MCSA (mm2)	299	0.03	0.666	−0.05	0.560	0.11	0.077	0.08	0.321	0.10	0.103	0.19	0.019
Forearm MD (mg/cm3)	299	0.04	0.478	0.06	0.462	−0.03	0.652	0.01	0.862	0.01	0.939	0.01	0.922
Forearm IMAT (mm2)	265	−0.05	0.487	−0.17	0.029	0.09	0.139	0.01	0.913	0.13	0.039	0.17	0.029
Calf MCSA (mm2)	296	0.01	0.858	−0.04	0.581	0.09	0.154	−0.07	0.376	0.18	0.002	0.19	0.016
Calf MD (mg/cm3)	296	−0.05	0.424	−0.10	0.192	0.02	0.693	0.07	0.362	−0.10	0.104	−0.07	0.414
Calf IMAT (mm2)	280	0.06	0.386	0.04	0.612	0.03	0.678	−0.08	0.305	0.14	0.029	0.16	0.037

^1.Partial correlations of unadjusted and adjusted (for race, sex, age, and latitude, N =239) between N 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.

^2.MCSA, muscle cross-sectional area; MD, muscle density; IMAT, intermuscular adipose tissue.