Table 1. Characteristics of study subjects (N = 180).
| Characteristics | n (%) |
|---|---|
| Age, median (IQR) | 26.5 (25–28) |
| Gender | |
| Male | 86 (47.8) |
| Female | 94 (52.2) |
| Number of on-calls/month | |
| 0 | 21 (11.7) |
| 1–2 | 4 (2.2) |
| 3–4 | 19 (10.6) |
| 5–6 | 48 (26.7) |
| > 6 | 88 (48.9) |
| Residency level | |
| R1 | 53 (29.4) |
| R2 | 47 (26.1) |
| R3 | 33 (18.3) |
| R4 | 33 (18.3) |
| R5 | 14 (7.8) |
| Smoking status | |
| Never smoked | 138 (76.7) |
| Smoker | 29 (16.1) |
| Ex-smoker | 13 (7.2) |
| Sleep quality (PSQI) | |
| Adequate | 31 (17.2) |
| Poor | 149 (82.8) |
| PHQ-4 | |
| Normal | 49 (27.2) |
| Mild | 54 (30.0) |
| Moderate | 46 (25.6) |
| Severe | 31 (17.2) |
| SWLS | |
| Extremely satisfied | 48 (26.7) |
| Satisfied | 35 (19.4) |
| Slightly satisfied | 31 (17.2) |
| Neutral | 6 (3.3) |
| Slightly dissatisfied | 28 (15.6) |
| Dissatisfied | 22 (12.2) |
| Extremely dissatisfied | 10 (5.6) |
IQR: interquartile range; R: residency year; PSQI: Pittsburgh Sleep Quality Index; PHQ-4: four-item Patient Health Questionnaire for anxiety and depression; SWLS: Satisfaction with Life Scale.