. Author manuscript; available in PMC: 2020 Dec 1.

Published in final edited form as: Contemp Clin Trials. 2019 Oct 24;87:105854. doi: 10.1016/j.cct.2019.105854

Table 5:

Effects of randomized treatment and non-randomized supplement use on season-adjusted change in serum 25(OH)D concentrations from baseline to 1-year ^a

	Beta (SE)	95% CI	p-value
Randomized Vitamin D Treatment	12.74 (0.35)	(12.04, 13.43)	<.0001
Randomized Omega-3 Treatment	−0.56 (0.35)	(−1.25, 0.13)	0.115
Non-randomized Supplement use at 1-year
Calcium	−0.10 (0.51)	(−1.09, 0.90)	0.850
Vitamin D (reference = none)
≤400 IU/day	0.61 (0.51)	(−0.38, 1.60)	0.230
401-800 IU/day	2.48 (0.51)	(1.48, 3.48)	<.0001
>800 IU/day	6.18 (0.87)	(4.48, 7.88)	<.0001
Baseline 25(OH)D	−0.37 (0.02)	(−0.41, −0.33)	<.0001

multivariable linear regression model of change in total 25(OH)D levels from baseline to 1-year, including Vitamin D treatment, omega-3 treatment and non-randomized Supplement use at 1-year. Based on 1623 observations complete in all covariates.