Table 2.
Demographic and characteristics by latent profile (N=1309)
| Variables | Class 1 | Class 2 | Class 3 | χ2/F | P value |
| Age (SD) | 30.94 (5.37) | 31.76 (5.91) | 33.64 (6.71) | 16.545 | <0.001 |
| Gender | 0.600 | 0.741 | |||
| Male | 6 (3.9) | 25 (3.3) | 11 (2.7) | ||
| Female | 149 (96.1) | 722 (96.7) | 396 (97.3) | ||
| Highest degree | 1.602 | 0.449 | |||
| Junior college and below | 29 (18.7) | 111 (14.9) | 60 (14.7) | ||
| Bachelor’s and above | 126 (81.3) | 636 (85.1) | 347 (85.3) | ||
| Marital status | 25.768 | <0.001 | |||
| Single/divorced/widowed | 62 (40.0) | 218 (29.2) | 80 (19.7) | ||
| Married | 93 (60.0) | 529 (70.8) | 327 (80.3) | ||
| Children | 26.943 | <0.001 | |||
| Yes | 87 (56.1) | 481 (64.4) | 311 (76.4) | ||
| No | 68 (43.9) | 266 (35.6) | 96 (23.6) | ||
| Professional title | 23.589 | <0.001 | |||
| Junior level | 102 (65.8) | 448 (60.0) | 207 (50.9) | ||
| Intermediate level | 50 (32.3) | 280 (37.5) | 172 (42.3) | ||
| Senior level | 3 (1.9) | 19 (2.5) | 28 (6.9) | ||
| Leadership role | 17.086 | <0.001 | |||
| Yes | 18 (11.6) | 86 (11.5) | 82 (20.1) | ||
| No | 137 (88.4) | 661 (88.5) | 325 (79.9) | ||
| Working years | 32.903 | <0.001 | |||
| ≤5 | 52 (33.5) | 217 (29.0) | 79 (19.4) | ||
| 6–15 | 91 (58.7) | 438 (58.6) | 241 (59.2) | ||
| ≥16 | 12 (7.7) | 92 (12.3) | 87 (21.4) | ||
| Average monthly income (¥)* | 7.990 | 0.239 | |||
| ≤3000 | 23 (14.8) | 75 (10.0) | 43 (10.6) | ||
| 3001~6000 | 93 (60.0) | 415 (55.6) | 217 (53.3) | ||
| 6001~9000 | 27 (17.4) | 179 (24.0) | 105 (25.8) | ||
| ≥9001 | 12 (7.7) | 78 (10.4) | 42 (10.3) | ||
| Number of night shifts per month | 17.797 | 0.001 | |||
| 0 | 42 (27.1) | 233 (31.2) | 164 (40.3) | ||
| 1–4 | 22 (14.2) | 143 (19.1) | 73 (17.9) | ||
| ≥5 | 91 (58.7) | 371 (49.7) | 170 (41.8) |
*US$1 equals ¥7.31, exchange rate on 29 September 2023.