| | Characteristics | 1st period (May–Jun) | 2nd period (Sep–Oct) | | N = 2027 | N = 1146 |
| | Sex, no (%) | | Male | 524 (25.9%) | 359 (31.3%) | | Female | 1486 (73.3%) | 782 (68.2%) | | Others | 17 (0.8%) | 5 (0.4%) |
| | Age, no (%) | | <30 years | 476 (23.5%) | 330 (28.8%) | | 30–39 years | 902 (44.5%) | 592 (51.7%) | | 40–49 years | 446 (22%) | 161 (14%) | | 50–59 years | 196 (9.7%) | 63 (5.5%) | | ≥60 years | 7 (0.3%) | 0 (0%) |
| | Status, no (%) | | Single | 1222 (60.3%) | 769 (67.1%) | | Marriage | 760 (37.4%) | 351 (30.6%) | | Divorce | 46 (2.3%) | 26 (2.3%) |
| | Accommodation, no (%) | | Single living | 497 (24.5%) | 329 (28.7%) | | Living with family | 1139 (56.2%) | 583 (50.9%) | | Living with a colleague (dormitory) | 391 (19.3%) | 234 (20.4%) |
| | Hospital level, no (%) | | University hospital | 849 (41.9%) | 431 (37.6%) | | Tertiary center hospital (>500 beds) | 130 (6.4%) | 257 (22.4%) | | Secondary center hospital (201–500 beds) | 586 (28.9%) | 113 (9.9%) | | Secondary center hospital (121–200 beds) | 78 (3.8%) | 86 (7.5%) | | Community hospital (10–120 beds) | 159 (7.8%) | 152 (13.3%) | | Private hospital | 206 (10.2%) | 98 (8.6%) | | Private clinic | 17 (0.8%) | 5 (0.4%) | | Others | 0 (0%) | 3 (0.3%) |
| | Job position, no (%) | | Physician | 997 (49.2%) | 675 (58.9%) | | Nurse | 836 (41.2%) | 351 (30.6%) | | Nursing assistant | 97 (4.8%) | 75 (6.5%) | | Pharmacist | 73 (3.6%) | 7 (0.6%) | | Laboratory staff | 15 (0.7%) | 8 (0.7%) | | Radiologic staff | 4 (0.2%) | 1 (0.1%) | | Administrative staff | 1 (0.05%) | 6 (0.5%) | | Others | 4 (0.2%) | 23 (2%) |
| | Specialty, no (%) | | Critical care | 222 (11%) | 81 (7.1%) | | Pulmonology | 110 (5.4%) | 52 (4.5%) | | Infectious disease | 55 (2.7%) | 44 (3.8%) | | Emergency | 182 (9%) | 88 (7.7%) | | Anesthesia | 0 (0%) | 62 (5.4%) | | General medicine | 635 (31.3%) | 458 (40%) | | Surgery | 281 (13.9%) | 104 (9.1%) | | Pediatric | 79 (3.9%) | 45 (3.9%) | | Others | 1041 (51.4%) | 187 (16.3%) |
| | Work experience, no (%) | | <1 years | 46 (2.3%) | 23 (2%) | | 1–5 years | 428 (21.1%) | 331 (28.9%) | | 6–10 years | 585 (28.9%) | 420 (36.6%) | | 11–15 years | 368 (18.2%) | 171 (14.9%) | | 16–20 years | 191 (9.4%) | 81 (7.1%) | | >20 years | 409 (20.2%) | 120 (10.5%) |
| | Monthly income, no (%) | | <10,000 THB | 34 (1.7%) | 14 (1.2%) | | 10,001–20,000 THB | 260 (12.8%) | 165 (14.4%) | | 20,001–30,000 THB | 504 (24.9%) | 295 (25.7%) | | 30,001–40,000 THB | 403 (19.9%) | 235 (20.5%) | | 40,001–50,000 THB | 250 (12.3%) | 132 (11.5%) | | >50,000 THB | 486 (24%) | 258 (22.5%) |
| | Average number of patients monthly, no (%) | | <20 | 203 (10%) | 102 (8.9%) | | 21–40 | 416 (20.5%) | 237 (20.7%) | | 41–60 | 286 (14.1%) | 202 (17.6%) | | 61–80 | 181 (8.9%) | 104 (9.1%) | | 81–100 | 201 (9.9%) | 101 (8.8%) | | >100 | 740 (36.5%) | 400 (34.9%) |
| | Average number of patients per shift, no (%) | | <10 | 735 (36.3%) | 404 (35.3%) | | 11–20 | 595 (29.4%) | 310 (27.1%) | | 21–30 | 274 (13.5%) | 151 (13.2%) | | 31–40 | 119 (5.9%) | 94 (8.2%) | | 41–50 | 77 (3.8%) | 57 (5%) | | >50 | 227 (11.2%) | 130 (11.3%) |
| | Number of shifts after hours monthly, no (%) | | 0 | 401 (19.8%) | 200 (17.5%) | | 1–2 | 175 (8.6%) | 92 (8%) | | 3–4 | 258 (12.7%) | 137 (12%) | | 5–6 | 242 (11.9%) | 173 (15.1%) | | >6 | 951 (46.9%) | 544 (47.5%) |
| | Average number of rest days weekly, no (%) | | 0–1 | 830 (40.9%) | 492 (42.9%) | | 2 | 887 (43.8%) | 450 (39.3%) | | 3 | 146 (7.2%) | 110 (9.6%) | | 4 | 92 (4.5%) | 47 (4.1%) | | 5 | 72 (3.6%) | 47 (4.1%) |
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