Table 1 Characteristics of study subjects according to night shift work
From: Relationship between thyroid stimulating hormone and night shift work
| Night shift work | |||||||
|---|---|---|---|---|---|---|---|
| Total | No | Yes | |||||
| n | n | % | n | % | P-valuea | ||
| Total | 967 | 421 | 43.5 % | 546 | 56.5 % | ||
| Age (years) | ≤29 | 364 | 84 | 20.0 % | 280 | 51.3 % | <0.001 |
| 30–39 | 338 | 165 | 39.2 % | 173 | 31.7 % | ||
| 40–49 | 229 | 148 | 35.2 % | 81 | 14.8 % | ||
| ≥50 | 36 | 24 | 5.7 % | 12 | 2.2 % | ||
| Body mass index (kg/m2) | <25 | 883 | 381 | 90.5 % | 502 | 91.9 % | 0.490 |
| ≥25 | 84 | 40 | 9.5 % | 44 | 8.1 % | ||
| Smoking | Non-/ex-smoker | 966 | 420 | 100 % | 546 | 100 % | 0.059 |
| Current smoker | 1 | 1 | 0.0 % | 0 | 0.0 % | ||
| Drinking | Non-/moderate drinker | 683 | 328 | 77.9 % | 355 | 65.0 % | <0.001 |
| Excessive drinker | 284 | 93 | 22.1 % | 191 | 35.0 % | ||
| Regular exercise | No | 421 | 71 | 16.9 % | 76 | 13.9 % | 0.120 |
| Yes | 546 | 350 | 83.1 % | 470 | 86.1 % | ||
| Department | Nursing | 654 | 167 | 39.8 % | 487 | 89.0 % | <0.001 |
| Other | 313 | 252 | 60.2 % | 61 | 11.0 % | ||