Table 1.

Characteristics of older adults with insomnia (OAI) compared to older adults with good sleep (OAGS) at initial screening.

Variable	Total sample (N=114)	OAI (n=63)	OAGS (n=51)	F/χ2/Z	df	p-Value
Age, years	67.77 (6.09)	68.03(6.54)	67.44(5.53)	Z=−0.15		.890
Sex, % female	65	71	57	χ2=2.63	1	.105
Race, % Caucasian	92	91	93	χ2=0.19	1	.661
Employment status, % working	39	33	45	χ2=1.60	1	.206
Subjective socioeconomic status†,‡	3.49(1.71)	3.40(1.78)	3.60(1.63)	0.49	95	.487
Married or living with partner, %	62	59	64	χ2=0.28	1	.597
Education, % ≥college	87	83	89	χ2=1.30	1	.254
Mini-Mental Status Exam§	29.36(0.98)	29.32(1.07)	29.40(0.86)	Z=−0.12		.911
Insomnia Severity Index	9.86(78.90)	16.70(3.50)	1.40(2.01)	8.69	112	<.001***
Apnea hypopnea index	5.62(5.62)	5.51(5.33)	5.77(6.01)	0.06	112	.815
Periodic limb movement arousal index	7.20 (5.80)	7.50 (5.89)	6.83 (5.89)	0.53	112	.530

Note:

^***p <.001.

^†Ostrove et al. 2000;

^‡Miyakawa et al. 2012;

^§O’Bryant et al., 2008.