Table 3.

Parameter estimates and significance tests for nested regression models that included nocturia variables (i.e., full models that included covariates^a and variables for nocturia frequency 1–2/night and 3–4/night for complete cases only; N = 673)

	Model 1: Self-Reported Sleep Quality		Model 2: Objective Wake After Sleep Onset (WASO)			Model 3: Objective Total Sleep Time (TST)			Model 4: Objective Time-in- Bed (TIB)
Significance tests for overall model	χ2 (DF)	P value	F (Df)	ΔR2b	P value	F(Df)	ΔR2 b	P value	F (Df)	ΔR2 b	P value
	9.84 (2)	.007	22.18 (2, 633)	.060	<.001	1.22 (2, 634)	.004	.297	8.68 (2, 635)	.024	<.001
Adjusted parameter estimates	Odds ratio (CI)	P value	Bc	CI	P value	Bc	CI	P value	Bc	CI	P value
Nocturia frequency 1–2/night	2.75 (1.10, 6.90)	.031	18.43	8.12, 28.74	<.001	−14.74	−33.32, 3.84	0.120	6.47	−9.96, 22.91	.439
Nocturia frequency 3–4/night	4.26 (1.65, 11.01)	.003	37.53	26.02, 49.04	<.001	−12.81	−33.56, 7.94	.226	31.1	12.72, 49.43	.001

^aAge, race, body mass index, dichotomous variables for stroke, diabetes, Alzheimer’s disease or dementia, heart failure, chronic lung disease, osteoarthritis, Parkinson’s disease, atherosclerotic disease (history of myocardial infarction, coronary artery disease, coronary artery disease requiring angioplasty or stenting, or peripheral vascular disease), polytomous variable for number of restless legs syndrome symptoms and frequency of nightmares, pain, and heartburn, Geriatric Depression Scale was entered as an interval variable, and sedating medication and frequency of use.

^bDifference in R² for full model that contained nocturia frequency variables versus reduced model that did not contain nocturia frequency variables.

^cUnstandardized regression coefficient