Table 1.
Sociodemographic characteristics of the study sample across chronotypes
| Characteristic | Morning-type | Neither-type | Evening-type | p value |
|---|---|---|---|---|
| Age (yr) | 42.01±8.54 | 37.57±7.61 | 35.22±5.87 | <0.001 |
| Sex (female) | 9 (9.28) | 15 (4.09) | 4 (7.84) | 0.097 |
| Marital status | 0.107 | |||
| Single, separated, deceased | 21 | 117 | 18 | |
| Married, remarried | 76 | 250 | 33 | |
| Religion | 0.151 | |||
| None | 54 (56.3) | 206 (56.3) | 38 (74.5) | |
| Buddhism | 21 (21.9) | 65 (17.8) | 2 (3.9) | |
| Christianity | 12 (12.5) | 66 (18) | 8 (15.7) | |
| Catholic | 9 (9.4) | 27 (7.4) | 3 (5.9) | |
| Education (yr) | 14.09±2.15 | 14.78±1.98 | 14.63±1.98 | 0.011 |
| Work period (mo), mean | 174.04 | 116.72 | 87.00 | <0.001 |
| Shift schedule | 0.006 | |||
| 8 or 24 hour rotating shifts | 66 (68.0) | 300 (81.7) | 43 (86.0) | |
| Daytime | 31 (31.9) | 67 (18.3) | 7 (14.0) | |
| Musculoskeletal symptoms (+) | 36 (37.1) | 147 (40.5) | 16 (31.4) | 0.420 |
Values are presented as number only, mean±standard deviation, and number (%).