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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: Sleep Med. 2020 Sep 10;75:459–467. doi: 10.1016/j.sleep.2020.09.004

Table 1.

Socio-demographic, health risk behaviors and contextual characteristics of study participants

Variable1 African American
White
Females (N=31,296) Males (N=22,334) Females (N=15,200) Males (N=9,719)
Age at enrollment, years 52 ± 9 51 ± 8 54 ± 9 54 ± 9
Source of enrollment, n (%)
Community Health Center 28,545 (91.2) 20,353 (91.1) 12,276 (80.8) 6,519 (67.1)
General Population mailing 2,751 (8.8) 1,981 (8.9) 2,924 (19.2) 3,200 (32.9)
County of residence, n (%)
Rural 8,099 (25.9) 4,540 (20.3) 3,735 (24.6) 2,272 (23.4)
Urban 2,3195 (74.1) 1,7788 (79.7) 1,1464(75.4) 7,444 (76.6)
Sleep duration, n (%)
< 5 2,061 (6.6) 1,258 (5.6) 1,046 (6.9) 565 (5.8)
5 – 6 9,296 (29.7) 6,300 (28.2) 4,495(29.6) 2,744 (28.2)
7 – 8 14,244 (45.5) 10,123(45.3) 7,649 (50.3) 5,194 (53.4)
≥ 9 5,695 (18.2) 4,653 (20.8) 2,010 (13.2) 1,216 (12.5)
Education completed, n (%)
< 9 years 2,273 (7.3) 1,958 (8.8) 1,140 (7.5) 816 (8.4)
9 – 11 years 7,033 (22.5) 5,498 (24.6) 2,537 (16.7) 1,319 (13.6)
High school or equivalent 10,241 (32.7) 7,959 (35.7) 4,964 (32.7) 2,863 (29.5)
Junior college 8,277 (26.5) 4,972 (22.3) 4,055 (26.7) 2,395 (24.7)
College graduate 3,447 (11.0) 1,933 (8.7) 2,500 (16.5) 2,317 (23.9)
Annual household income, n (%)
<$15,000 18,267 (59.1) 13,190 (59.7) 7,356 (49.2) 3,971 (41.5)
$15,000 – $24,999 7,124 (23.1) 4,710 (21.3) 2,915 (19.5) 1,620 (16.9)
$25,000 – $49,999 3,949 (12.8) 2,810 (12.7) 2,466 (16.5) 1,665 (17.4)
≥$50,000 1,547 (5.0) 1,386 (6.3) 2,204 (14.8) 2,320 (24.2)
Marital status, n (%)
Married/living with partner 8,412 (27.0) 7,121 (32.0) 6,806 (45.2) 5,119 (53.9)
Divorced/separated 10,818 (34.7) 7,482 (33.6) 5,100 (33.9) 2,714 (28.6)
Widowed 4,399 (14.1) 819 (3.7) 2,000 (13.3) 342 (3.6)
Never been married 7,554 (24.2) 6,816 (30.7) 1,146 (7.6) 1,323 (13.9)
Body Mass Index (kg/m2), n (%)
<18.5 327 (1.1) 287 (1.3) 266 (1.8) 86 (0.9)
18.5–24.9 4,813 (15.6) 7,727 (34.9) 3,775 (25.2) 2,668 (27.6)
25–29.9 7,838 (25.5) 7,777 (35.1) 3,979 (26.5) 3,599 (37.3)
30–34.9 7,673 (24.9) 3,971 (17.9) 3,246 (21.6) 1,997 (20.7)
≥35 10,145 (32.9) 2,405 (10.8) 3,739 (24.9) 1,304 (13.5)
Currently working, n (%)
Yes 12,507 (40.2) 8,543 (38.4) 5,834 (38.6) 4,016 (41.5)
No 18,624 (59.8) 13,705 (61.6) 9,289 (61.4) 5,665 (58.5)
Cigarette smoking, n (%)
Current 10,126 (32.5) 12,598 (56.7) 5,392 (35.7) 3,898 (40.7)
Former 6,141 (19.7) 4,657 (21.0) 3,870 (25.6) 3,229 (33.7)
Never 14,857 (47.7) 4,947 (22.3) 5,859 (38.7) 2,462 (25.7)
Total sedentary time, h/day 9.57 ± 5.18 9.37 ± 5.33 8.84 ± 4.49 9.09 ± 4.80
Total light, moderate and vigorous work, MET-h/day 20.13 ± 15.41 24.54 ± 22.32 19.82 ± 15.45 21.65 ± 20.29
Total energy intakes, kcal/day 2,346 ± 1,341 3,177 ± 1,633 1,932 ± 974 2,803 ± 1,355
Healthy Eating Index, score 60 ± 12 55 ± 11 59 ± 13 55 ± 12
Dietary intakes (FFQ), servings/day
Fruits/vegetables 4 ± 2 3 ± 2 3 ± 2 3 ± 2
Bread 2 ± 1 2 ± 1 2 ± 1 2 ± 1
Meat 2 ± 1 2 ± 1 1 ± 1 2 ± 1
Coffee consumption, times/day 0.41 ± 0.75 0.46 ± 0.77 1.00 ± 1.16 1.17 ± 1.20
Soda consumption, times/day 0.83 ± 1.12 0.77 ± 1.06 1.12 ± 1.36 1.05 ± 1.28
Alcohol use, n (%)
Yes 13,754 (44.5) 15,280 (69.3) 6,495 (43.4) 5,734 (60.2)
No 17,123 (55.5) 6,769 (30.7) 8,481 (56.6) 3,787 (39.8)
Alcohol use among drinkers, drinks/day 1.71 ± 4.14 4.06 ± 6.32 1.00 ± 2.98 3.13 ± 5.87
1

data are presented as n (%) or mean ± sd as denoted for each variable.