Table 2.

Percent change from baseline in aBMD, 25-hydroxyvitamin D, parathyroid hormone,and bone turnover markers among participants with complete data (N=69) (Mean±SD)

	6 Months			12 Months
	Percent Change	P Value	P Adjusted for TBF	Percent Change	P Value	P Adjusted for TBF
	DXA parameters
Lumbar spine aBMD
Low VitD	0.5 ± 3.1	0.34	0.51	0.4 ± 4.4	0.26	0.36
Moderate VitD	-0.3 ± 3.5			-0.8 ± 4.6
Total hip aBMD
Low VitD	0.4 ± 2.9	0.47	0.21	-0.5 ± 3.1	0.74	0.51
Moderate VitD	-0.1 ± 2.8			-0.8 ± 3.2
Femoral neck aBMD
Low VitD	-0.7 ± 3.9	0.79	0.90	-1.1 ± 3.5	0.96	0.78
Moderate VitD	-0.4 ± 3.6			-1.1 ± 5.1
Distal 1/3 radius aBMD
Low VitD	-1.6* ± 2.7	0.10	0.17	-1.3* ± 2.8	0.69	0.67
Moderate VitD	-0.5 ± 2.9			-1.6* ± 3.5
Ultradistal radius aBMD
Low VitD	-1.3* ± 3.1	0.73	0.53	-1.6* ± 4.2	0.39	0.42
Moderate VitD	-1.0 ± 4.2			-0.7 ± 4.7
	Vitamin D and bone turnover markers
25-hydroxyvitamin D
Low VitD	45.1* ± 44.1	0.041		28.1* ± 41.9	0.031
Moderate VitD	66.7* ± 78.0			51.2* ± 68.9
Parathyroid hormone
Low VitD	-17.7* ± 36.2	0.721		-15.9 ± 71.4	0.568
Moderate VitD	-22.5* ± 31.8			-24.2* ± 32.7
P1NP
Low VitD	-13.4* ± 38.4	0.527		-8.1 ± 37.3	0.726
Moderate VitD	-6.8 ± 35.9			−4.0 ± 41.1
CTX
Low VitD	-4.8 ± 51.0	0.315		-9.9 ± 65.3	0.388
Moderate VitD	-17.0* ± 37.3			-21.3* ± 42.0

Abbreviations: TBF: total body fat; CTX, C-telopeptide; P1NP, pro-collagen type 1 amino-terminal propeptide

^*p<0.05 for within-group change from baseline