. Author manuscript; available in PMC: 2016 Mar 31.

Published in final edited form as: J Ren Nutr. 2012 Jan 9;22(4):423–433. doi: 10.1053/j.jrn.2011.10.006

Table 3.

Associations Between Levels of 25-Hydroxyvitamin D (25(OH)D) and 1,25-Dihydroxyvitamin D (1,25(OH)₂D) and Physical Performance Measures

	Usual Gait Speed (cm/second)	Fast Gait Speed (cm/second)	6-Minute Walk	Static Balance (1 Leg)	Sit-to-Stand Time (5 Repetitions)	Isokinetic Strength (90°/second)	Isokinetic Strength (180°/second)	Isometric MVC
Serum 25(OH)D	r = 0.41	r = 0.14	r = 0.20	r = 0.07	r = −0.32	r = 0.01	r = 0.04	r = 0.02
Serum 25(OH)D	P ± .04	P = .51	P = .33	P = .75	P = .13	P = .95	P = .86	P = .78
Serum 1,25(OH)₂D	r = 0.46	r = 0.36	r = 0.38	r = 0.42	r = −0.42	r = 0.35	r = 0.48	r = 0.35
Serum 1,25(OH)₂D	P ± .02	P = .08	P = .06	P ± .03	P ± .04	P = .08	P ± .02	P = .08

MVC, maximal voluntary contraction.