Table 4.

Regression models predicting ADLs using objective and subjective sleep measures that are independently significant (n = 593)

	Model 1	Model 2a	Model 3b	Model 4c
Covariates
Age	.01**	.01***	.01**	.01***
Female	.03	.07	.05	.08
Persons of color	.17**	.09	.14*	.08
Disease burden	.10***	.08***	.09***	.08***
Married	−.07	−.04	−.05	−.04
Obesity	.28***	.32***	.29***	.32***
Education	−.13**	−.10**	−.12***	−.10**
Time lag (months)	−.00	−.00	−.00	−.00
Objective sleep
WASO			.09*	.04
Subjective sleep
PSQI		.05***		.05***
R 2	.3953	.4454	.4026	.4465
Change in R2		.0490	.0073	.0442
F for (change in) R2	37.72***	37.80***	5.44*	32.88***

Note. WASO = wake after sleep onset. PSQI = Pittsburgh Sleep Quality Index. For interpretability, WASO was converted to 30-minute units.

^aModel 2 R² values reflect the change from Model 1 to Model 2.

^bModel 3 R² values reflect the change from Model 1 to Model 3.

^cModel 4 R² values reflect the change from Model 3 to Model 4.

^***p < .001

^**p< .01

^*p<.05.