Table 1.

Descriptive statistics for selected baseline characteristics of the overall sample (N=159) and for treatment (N=106) and control (N=53) groups with p-values for difference between the treatment and control groups.

Variable		Total	Treatment	Control
Age: mean, (SD)		72.2 (7.7)	72.1 (7.9)	72.4 (7.3)
Gender (Male)		154 (96.9%)	102 (96.2%)	52 (98.1%)
Race (Non-Hispanic White)		125 (78.6%)	83 (78.3%)	42 (79.2%)
Education
	Less than High School	6 (3.8%)	6 (5.7%)	0 (0.0%)
	High School Graduate	25 (15.7%)	18 (17.0%)	7 (13.2%)
	Some College	70 (44.0%)	44 (41.5%)	26 (49.1%)
	College Graduate	30 (18.9%)	18 (17.0%)	12 (22.6%)
	Post Baccalaureate	28 (17.6%)	20 (18.9%)	8 (15.1%)
Marital Status
	Married	66 (41.5%)	43 (40.6%)	23 (43.4%)
	Living as Married	11 (6.9%)	8 (7.5%)	3 (5.7%)
	Divorced/Separated	48 (30.2%)	34 (32.1%)	14 (26.4%)
	Widowed	14 (8.8%)	10 (9.4%)	4 (7.5%)
	Single/Never Married	20 (12.6%)	11 (10.4%)	9 (17.0%)
Employment
	Not working	121 (76.1%)	81 (76.4%)	40 (75.5%)
	Working part time	31 (19.5%)	19 (17.9%)	12 (22.6%)
	Working full time	7 (4.4%)	6 (5.7%)	1 (1.9%)
AHI		9.4 (5.3)	9.9 (5.4)	8.3 (5.1)
Epworth Sleepiness Scale		5.1 (3.7)	5.4 (4.0)	4.6 (2.8)
PHQ9		4.8 (4.3)	5.1 (4.3)	4.4 (4.3)
Baseline sleep outcomes
Total sleep time (TST), Diary		356.2 (82.0)	350.1 (79.0)	368.3 (87.2)
Total sleep time (TST), Actigraphy		420.2 (67.8)	416.7 (70.8)	427.4 (61.4)
TST discrepancy, (Diary – Actigraphy)		−64.1 (80.7)	−66.5 (78.0)	−59.1 (86.4)
Total wake time (TWT), Diary		143.2 (88.9)	144.0 (89.5)	141.6 (88.5)
Total wake time (TWT), Actigraphy		85.2 (39.0)	83.0 (38.6)	89.7 (39.7)
TWT discrepancy, (Diary - Actigraphy)		58.0 (80.3)	61.0 (79.4)	51.9 (82.4)
PSQI		9.1 (3.4)	9.4 (3.5)*	8.3 (3.2)*

Notes: AHI = apnea-hypopnea index; PHQ9 = Patient Health Questionnaire 9; TST = total sleep time; TWT = total wake time; PSQI = Pittsburgh Sleep Quality Index;

^*p < 0.05;

^**p < 0.01;

^***p < 0.001.