Table 1. Prevalence of short, adequate, and long sleep duration for participant sociodemographic and health behavior characteristics.
| Sleep duration category | Total sample | Short ≤6 h |
Adequate 7–8 h |
Long ≥9 h |
|---|---|---|---|---|
| Total sample | 439, 933 | 107,718 (24.6) | 297,914 (67.7) | 33, 893 (7.7) |
| Sociodemographic characteristics | ||||
| Age in years [mean (SD)] | 56.5 (8.1) | 56.4 (7.9) | 56.4 (8.1) | 58.5 (8.0) |
| Sex [N (%)] | ||||
| Female | 245, 079 (55.7) | 59,176 (54.7) | 166,452 (55.9) | 19,451 (57.4) |
| Male | 194,854 (44.3) | 48,950 (45.3) | 131,462 (44.1) | 14,442 (42.6) |
| Ethnic group [N (%)] | ||||
| Mixed/other | 6298 (1.4) | 2117 (2.0) | 3718 (1.3) | 463 (1.3) |
| Asian/Asian/British/Chinese | 9597 (2.2) | 2867 (2.7) | 5992 (2.0) | 738 (2.2) |
| Black/Black British | 6601 (1.5) | 3004 (2.8) | 3172 (1.1) | 425 (1.3) |
| White | 416,106 (94.9) | 99,730 (92.6) | 284,224 (95.6) | 32,152 (95.2) |
| Employment [N (%)] | ||||
| Unemployed | 35,829 (8.2) | 10,330 (9.6) | 20,507 (6.9) | 4992 (14.9) |
| Retired | 146,531 (33.6) | 31,668 (29.6) | 97,787 (33.1) | 17,076 (50.9) |
| Employed | 253,835 (58.2) | 65,123 (60.8) | 177,240 (60.0) | 11,472 (34.2) |
| Attended college [N (%)] | ||||
| Yes | 142, 955 (39.5) | 30,704 (35.9) | 103,936 (41.3) | 8315 (33.5) |
| No | 218,815 (60.5) | 54,745 (54.1) | 147,599 (58.7) | 16,471 (66.5) |
| Chronotype [N (%)] | ||||
| Early | 119,110 (27.1) | 33,670 (31.1) | 77,126 (25.9) | 8314 (24.5) |
| Intermediate | 281,266 (63.9) | 63,137 (58.4) | 196,437 (65.9) | 21,692 (64.0) |
| Late | 39,557 (9.0) | 11,319 (10.5) | 24,351 (8.2) | 3887 (11.5) |
| Health behavior characteristics | ||||
| Physical activity (minutes/week) [Mean (SD)] | ||||
| Walking | 328.5 (377.0) | 347.1 (399.8) | 323.4 (370.1) | 316.0 (360.5) |
| Range for walking 0–2100 min/week | ||||
| Moderate | 286.4 (369.4) | 299.6 (386.1) | 280.2 (362.9) | 301.8 (373.6) |
| Range for moderate 0–2100 min/week | ||||
| Vigorous | 140.7 (188.7) | 154.7 (215.3) | 136.0 (178.0) | 142.9 (197.4) |
| Range for vigorous 0 – 2100 min/week | ||||
| Screen-based sedentary behavior (hours/day) [median (interquartile range; IQR)] | ||||
| Computer use | 1.0 (1.0) | 1.0 (1.0) | 1.0 (1.0) | 0.5 (1.0) |
| Television viewing | 3.0 (2.0) | 3.0 (2.0) | 3.0 (2.0) | 3.0 (2.0) |
| Dietary habits [median servings/day (interquartile range; IQR)] | ||||
| Fruits | 2.0 (2.0) | 2.0 (2.0) | 2.0 (2.0) | 2.0 (2.0) |
| Vegetables | 1.3 (1.0) | 1.3 (1.0) | 1.3 (1.0) | 1.3 (1.0) |
| Current smoking [N (%)] | ||||
| Yes | 34,401 (7.8) | 10,615 (9.8) | 20,589 (6.9) | 3197 (9.4) |
| No | 405,212 (92.2) | 97,410 (90.2) | 277,140 (93.1) | 30,662 (90.6) |