Vitamin D Binding Protein Affects the Correlation of 25(OH)D and Frailty in the Older Men

Table 3

Odds ratios of being frail versus nonfrail of participants across quarties of 25(OH)D and DBP levels.

Quarties of 25(OH)D (nmol/L)	Quarties of vitamin D binding protein (nmol/L)
	Q1b; (<4046)	Q2b; (4046–<5269)	Q3b; (5269–<6686)	Q4b; (≥6686)
Q1a (<31.5)	2.63^†	1.89	1.73	3.18*
Q2a (31.5.3–<41.8)	2.52*	1.95	2.17	2.02
Q3a (41.8–<56.6)	1.36	1.76	1.71	1.82
Q4a (≥56.6)	1.0 (reference)	1.22	1.29	1.37

Notes: 25(OH)D: 25-hydroxyvitamin D; DBP: vitamin D binding protein.
^∗𝑃<0.05.
^†𝑃<0.01.