Table 1.
Baseline characteristics of participants
| Characteristic | Overall, N = 9,996 | Day time sleep duration(<6 h), N = 3,557 | Day time sleep duration(6–9 h), N = 5,420 | Day time sleep duration(>9 h), N = 1,019 |
|---|---|---|---|---|
| Gender, n (%) | ||||
| Female | 5,339.0 (53.4%) | 2,087.0 (58.7%) | 2,751.0 (50.8%) | 501.0 (49.2%) |
| Male | 4,657.0 (46.6%) | 1,470.0 (41.3%) | 2,669.0 (49.2%) | 518.0 (50.8%) |
| Age, Median (IQR) | 57.00 (50.00, 63.00) | 58.00 (52.00, 64.00) | 56.00 (49.00, 62.00) | 57.00 (50.00, 64.00) |
| Smoking status, n (%) | ||||
| Currently smoking | 3,078.0 (30.8%) | 1,028.0 (28.9%) | 1,719.0 (31.7%) | 331.0 (32.5%) |
| Ever smoked | 737.0 (7.4%) | 247.0 (6.9%) | 396.0 (7.3%) | 94.0 (9.2%) |
| Never smoked | 6,181.0 (61.8%) | 2,282.0 (64.2%) | 3,305.0 (61.0%) | 594.0 (58.3%) |
| Drinking status, n (%) | ||||
| Currently drinking | 2,608.0 (26.1%) | 874.0 (24.6%) | 1,448.0 (26.7%) | 286.0 (28.1%) |
| Ever drunk | 423.0 (4.2%) | 173.0 (4.9%) | 208.0 (3.8%) | 42.0 (4.1%) |
| Never drink | 6,965.0 (69.7%) | 2,510.0 (70.6%) | 3,764.0 (69.4%) | 691.0 (67.8%) |
| Education level, n (%) | ||||
| Advanced education | 3,207.0 (32.1%) | 920.0 (25.9%) | 1,959.0 (36.1%) | 328.0 (32.2%) |
| College and above | 196.0 (2.0%) | 37.0 (1.0%) | 148.0 (2.7%) | 11.0 (1.1%) |
| Illiterate | 2,619.0 (26.2%) | 1,132.0 (31.8%) | 1,201.0 (22.2%) | 286.0 (28.1%) |
| Primary school | 3,974.0 (39.8%) | 1,468.0 (41.3%) | 2,112.0 (39.0%) | 394.0 (38.7%) |
| CVD, n (%) | ||||
| Yes | 8,858.0 (88.6%) | 3,083.0 (86.7%) | 4,854.0 (89.6%) | 921.0 (90.4%) |
| No | 1,138.0 (11.4%) | 474.0 (13.3%) | 566.0 (10.4%) | 98.0 (9.6%) |
| eGFR, Median (IQR) | 97.91 (90.94, 104.09) | 97.38 (90.26, 103.49) | 98.25 (91.41, 104.38) | 98.21 (91.33, 104.16) |
| Hypertension, n (%) | 3,522.0 (35.2%) | 1,273.0 (35.8%) | 1,884.0 (34.8%) | 365.0 (35.8%) |
| Diabetes, n (%) | 553.0 (5.5%) | 191.0 (5.4%) | 304.0 (5.6%) | 58.0 (5.7%) |
| Dyslipidemia, n (%) | 621.0 (6.2%) | 202.0 (5.7%) | 357.0 (6.6%) | 62.0 (6.1%) |
| Residence status, n (%) | ||||
| Rural Village | 6,370.0 (63.7%) | 2,350.0 (66.1%) | 3,334.0 (61.5%) | 686.0 (67.3%) |
| Urban Community | 3,626.0 (36.3%) | 1,207.0 (33.9%) | 2,086.0 (38.5%) | 333.0 (32.7%) |
| Obesity status, n (%) | ||||
| Normal weight | 5,279.0 (52.8%) | 1,952.0 (54.9%) | 2,786.0 (51.4%) | 541.0 (53.1%) |
| Over weight and obeisity | 4,122.0 (41.2%) | 1,352.0 (38.0%) | 2,346.0 (43.3%) | 424.0 (41.6%) |
| Under weight | 595.0 (6.0%) | 253.0 (7.1%) | 288.0 (5.3%) | 54.0 (5.3%) |
| Nocturnal sleep duration, Median (IQR) | 7.00 (5.00, 8.00) | 5.00 (4.00, 6.00) | 7.00 (7.00, 8.00) | 9.00 (8.00, 10.00) |
| Day time sleep duration, Median (IQR) | 1.00 (0.00, 60.00) | 0.00 (0.00, 20.00) | 30.00 (0.00, 60.00) | 90.00 (30.00, 120.00) |
| WC, Median (IQR) | 84.30 (78.00, 91.40) | 83.80 (77.20, 90.80) | 85.00 (78.00, 92.00) | 85.00 (78.00, 92.80) |
| Height, Median (IQR) | 158.20 (151.90, 165.00) | 156.70 (150.90, 163.50) | 159.10 (152.60, 165.70) | 159.00 (152.10, 165.60) |
| Weight, Median (IQR) | 58.10 (51.70, 65.60) | 56.60 (50.20, 63.80) | 59.00 (52.50, 66.80) | 58.80 (52.35, 66.30) |
| BMI, Median (IQR) | 23.17 (20.93, 25.82) | 22.86 (20.74, 25.46) | 23.36 (21.06, 26.01) | 23.28 (21.03, 26.05) |
| Nocturnal sleep duration(Quatile), n (%) | ||||
| <6 h | 4,827.0 (48.3%) | 3,557.0 (100.0%) | 1,270.0 (23.4%) | 0.0 (0.0%) |
| 6–9 h | 4,761.0 (47.6%) | 0.0 (0.0%) | 4,150.0 (76.6%) | 611.0 (60.0%) |
| >9 h | 408.0 (4.1%) | 0.0 (0.0%) | 0.0 (0.0%) | 408.0 (40.0%) |
| Day time sleep duration(Quatile), n (%) | ||||
| 0–30 min | 6,424.0 (64.3%) | 2,904.0 (81.6%) | 3,235.0 (59.7%) | 285.0 (28.0%) |
| >30 min | 3,572.0 (35.7%) | 653.0 (18.4%) | 2,185.0 (40.3%) | 734.0 (72.0%) |