Table 4: Association between actigraphy-determined continuous nocturnal sleep duration and BMD by 25OHD level in fully adjusted model.

Data presented as the difference in BMD (g/cm²) per additional hour of sleep (β) ± SEE (p-value). Adjusted for age, race, clinical site, BMI, alcohol, season of 25-hydroxyvitamin D blood draw, eGFR, daily naps, hours of sleep needed to feel rested, melatonin level, calcium use, androgen use, anti-androgen use, PASE Score, self-reported health status

	25OHD <20 ng/mL	25OHD 20-29 ng/mL	25OHD ≥30 ng/mL
N (%)	228	744	792
L-spine	0.023 ± 0.015 (p = 0.12)	0.011 ± 0.009 (p = 0.25)	−0.003 ± 0.008 (p = 0.67)
Total Hip	0.016 ± 0.008 (p = 0.04)	0.003 ± 0.004 (p = 0.43)	0.003 ±0.004 (p = 0.44)
Femoral Neck	0.011 ± 0.007 (p = 0.12)	0.0002 ± 0.004 (p = 0.97)	0.004 ± 0.004 (p = 0.31)