Table 1.
Sample distribution by sleep quality, duration, and other study variables
| Sample size |
Good sleep quality (%) | Sleep duration (hours per day) (%) |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| n | % | ≤ 5 | 6 | 7 | 8 | 9 | ≥ 10 | ||
| Total | 15,638 | 100.0 | 63.8 | 12.4 | 14.6 | 13.8 | 22.9 | 7.7 | 28.6 |
| (100.0) | (65.0) | (13.1) | (16.2) | (18.0) | (28.0) | (9.2) | (15.5) | ||
| Ages 65-79 | 5,047 | 32.3 | 65.2 | 13.0 | 16.3 | 18.4 | 28.3 | 9.1 | 14.9 |
| Ages 80-89 | 3,870 | 24.7 | 63.0 | 14.2 | 14.9 | 13.1 | 23.6 | 7.8 | 26.4 |
| Ages 90-99 | 3,927 | 25.1 | 63.4 | 11.0 | 14.1 | 11.8 | 20.2 | 6.8 | 36.1 |
| Age 100+ | 2,794 | 17.9 | 63.8 | 10.9 | 12.0 | 9.1 | 15.9 | 6.2 | 45.9 |
| Women | 8,950 | 57.2 | 60.6 | 13.1 | 15.0 | 13.6 | 21.0 | 7.1 | 30.2 |
| Men | 6,688 | 42.8 | 68.4 | 11.5 | 14.1 | 14.0 | 25.4 | 8.5 | 26.5 |
| Minority ethnicity | 964 | 6.2 | 53.8 | 12.7 | 14.2 | 14.3 | 22.0 | 8.1 | 28.7 |
| Han ethnicity | 14,674 | 93.8 | 64.6 | 12.4 | 14.7 | 13.7 | 23.0 | 7.7 | 28.6 |
| Rural | 8,659 | 55.4 | 64.2 | 12.2 | 14.5 | 13.3 | 22.5 | 7.7 | 29.8 |
| Urban | 6,979 | 44.6 | 63.9 | 12.8 | 14.9 | 14.3 | 23.4 | 7.6 | 27.0 |
| North | 897 | 5.7 | 63.3 | 12.5 | 14.8 | 14.1 | 22.4 | 7.1 | 29.1 |
| Northeast | 1,497 | 9.6 | 71.3 | 12.8 | 14.8 | 15.2 | 21.9 | 6.7 | 28.6 |
| East | 6,087 | 38.9 | 64.5 | 11.3 | 13.5 | 14.3 | 22.4 | 8.3 | 30.2 |
| Central/South | 4,660 | 29.8 | 57.1 | 11.7 | 15.0 | 13.1 | 22.5 | 8.5 | 29.2 |
| West | 2,497 | 16.0 | 70.9 | 16.4 | 16.6 | 12.8 | 25.5 | 5.4 | 23.3 |
| 0 years of schooling | 9,587 | 61.3 | 62.0 | 12.7 | 14.7 | 13.1 | 21.0 | 7.2 | 31.3 |
| 1+ years of schooling | 6,051 | 38.7 | 66.8 | 12.0 | 14.6 | 14.7 | 25.8 | 8.5 | 24.4 |
| Poor family economic condition | 13,138 | 84.0 | 61.8 | 13.1 | 14.9 | 13.8 | 22.4 | 7.5 | 28.3 |
| Good family economic condition | 2,500 | 16.0 | 75.1 | 9.0 | 13.2 | 13.7 | 25.2 | 8.6 | 30.3 |
| Did not get adequate medical service | 1,793 | 11.5 | 45.0 | 19.7 | 16.1 | 12.2 | 19.0 | 6.9 | 27.1 |
| Got adequate medical service | 13,845 | 88.5 | 66.3 | 11.5 | 14.5 | 13.9 | 23.4 | 7.9 | 28.8 |
| Not married | 10,556 | 67.5 | 62.8 | 12.7 | 14.4 | 12.4 | 20.3 | 6.9 | 33.4 |
| Married | 5,082 | 32.5 | 66.4 | 11.8 | 15.1 | 16.9 | 28.3 | 9.3 | 18.6 |
| 0 or 1 living child | 2,522 | 16.1 | 60.6 | 13.6 | 13.8 | 12.3 | 20.7 | 6.8 | 32.8 |
| 2 living children | 2,188 | 14.0 | 64.2 | 11.7 | 16.1 | 13.4 | 21.5 | 6.8 | 30.5 |
| 3 living children | 3,022 | 19.3 | 63.3 | 12.2 | 16.0 | 14.1 | 21.9 | 8.3 | 27.5 |
| 4 living children | 3,024 | 19.4 | 64.4 | 11.3 | 14.4 | 14.8 | 23.8 | 8.0 | 27.7 |
| 5 living children | 2,412 | 15.4 | 67.0 | 12.5 | 14.0 | 13.7 | 25.1 | 8.0 | 26.7 |
| 6+ living children | 2,470 | 15.8 | 64.2 | 13.4 | 13.4 | 11.9 | 24.2 | 8.0 | 27.1 |
| Live alone | 2,097 | 13.4 | 59.4 | 14.6 | 16.0 | 14.3 | 22.0 | 7.6 | 25.5 |
| Live with spouse or family | 13,119 | 83.9 | 64.9 | 11.9 | 14.3 | 13.8 | 23.2 | 7.7 | 29.1 |
| Live in an institution | 422 | 2.7 | 55.7 | 17.5 | 18.0 | 11.1 | 16.4 | 7.1 | 29.9 |
| Current nonsmoker | 12,633 | 80.8 | 62.4 | 12.7 | 14.9 | 13.7 | 22.0 | 7.3 | 29.4 |
| Current smoker | 3,005 | 19.2 | 70.1 | 11.3 | 13.6 | 13.9 | 26.4 | 9.4 | 25.4 |
| Current non-consumer of alcohol | 12,492 | 79.9 | 62.1 | 12.7 | 15.1 | 13.8 | 22.3 | 7.4 | 28.7 |
| Current alcohol consumer | 3,146 | 20.1 | 71.0 | 11.5 | 13.0 | 13.5 | 25.1 | 8.8 | 28.1 |
| IADL not disabled | 4,912 | 31.4 | 72.5 | 10.4 | 15.2 | 17.9 | 29.4 | 10.0 | 17.1 |
| IADL disabled | 10,726 | 68.6 | 60.0 | 13.4 | 14.4 | 11.9 | 19.9 | 6.6 | 33.8 |
| ADL not disabled | 11,704 | 74.8 | 66.0 | 12.1 | 15.1 | 15.3 | 25.4 | 8.4 | 23.7 |
| ADL disabled | 3,934 | 25.2 | 57.5 | 13.3 | 13.4 | 9.1 | 15.4 | 5.7 | 43.1 |
| Cognitively unimpaired | 9,527 | 60.9 | 67.2 | 11.4 | 15.1 | 15.8 | 26.0 | 8.8 | 22.9 |
| Cognitively impaired | 6,111 | 39.1 | 58.8 | 14.0 | 13.9 | 10.6 | 18.0 | 6.0 | 37.5 |
| Self-rated good health | 11,995 | 76.7 | 68.8 | 10.2 | 14.5 | 15.0 | 24.9 | 8.5 | 26.9 |
| Self-rated poor health | 3,643 | 23.3 | 47.6 | 19.7 | 15.2 | 9.7 | 16.1 | 5.2 | 34.1 |
| Have no chronic diseases | 5,300 | 33.9 | 72.5 | 8.4 | 13.1 | 14.8 | 26.2 | 8.9 | 28.6 |
| Have 1+ chronic diseases | 10,338 | 66.1 | 59.5 | 14.5 | 15.4 | 13.3 | 21.2 | 7.0 | 28.6 |
| Do not often feel anxious or fearful | 14,943 | 95.6 | 64.7 | 11.9 | 14.5 | 13.8 | 23.2 | 7.8 | 28.8 |
| Often feel anxious or fearful | 695 | 4.4 | 47.3 | 23.3 | 16.7 | 13.8 | 17.1 | 5.2 | 24.9 |
Figures in the parentheses are weighted, while all others are unweighted.