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. 2017 Mar 9;40(5):zsx043. doi: 10.1093/sleep/zsx043

Table 1.

Weighted distributions of sociodemographic, behavioral, health, and sleep characteristics among the analytic sample measured at Wave 2 in the National Social Life, Health and Aging Project (NSHAP) from August 2010 to May 2011a.

Characteristic Value
Age, mean (IQR) 71.5 (66–78)
Female, n (%) 364 (53.7)
Race, n (%)
 White, non-Hispanic 564 (83.2)
 White, Hispanic 26 (3.9)
 African American, non-Hispanic 46 (6.8)
 African American, Hispanic 0 (0.0)
 Other 42 (6.2)
Education, n (%)
 Less than high school 95 (14.0)
 High school or equivalent 170 (25.1)
 Voc cert/some college/Assoc 260 (38.3)
 Bachelors or higher 154 (22.7)
Drink alcohol, n (%)
 Does not drink 287 (42.3)
 1–2 drinks/day 329 (48.5)
 3+ drinks/day 63 (9.2)
Smoke cigarettes, n (%)
 Current smoker 96 (14.1)
Physical activity, n (%)
 No physical activity 136 (20.1)
 <3 time/month 139 (20.5)
 1+ times/week 403 (59.4)
Modified Charlson Comorbidity, n (%)
 0 69 (10.1)
 1–2 314 (46.2)
 3+ 296 (43.6)
Depressive symptoms,b mean (IQR) 4.32 (1–7)
Hormone replacement therapy,cn (%)
 No 611 (91.9)
 Yes 54 (8.1)
Diurnal type,dn (%)
 8 pm– 1:59 am 105 (19.3)
 2 am–2:59 am 194 (35.6)
 3 am–8:59 am 246 (45.1)
Season, n (%)
 Winter 117 (17.4)
 Spring 56 (8.3)
 Summer 175 (26.0)
 Autumn 324 (48.2)
Currently Employed, n (%)
 No 515 (76.6)
 Yes 157 (23.4)
Actigraph-Measured Sleep, mean (IQR)
 Wake after sleep onset (WASO), hours 0.6 (0.4–0.8)
 Duration, hours 7.8 (7.1–8.7)
 Fragmentation (%) 14.3 (10.3–18.4)
Self-Reported Sleep, mean (IQR)
Duration, hours 7.4 (6–8)
 Troubled Sleep Scalee 2.9 (2–4)

Abbreviations: IQR, interquartile range; CES-D, Center for Epidemiological Studies-Depression.

a N = 672.

bAssesed utilizing a modified CES-D scale.

cAmong women only.

dDiurnal type was defined using the average midpoint of the sleep interval over the 3-day ancillary study period.

eTroubled sleep Scale is a combined metric (0 = Never/rarely, 1 = Sometimes, 2 = Most of the time) from 4 questions: feeling rested in the morning, trouble falling asleep, trouble waking during the night, and trouble waking too early.