Table 2 Demographic and clinical characteristics of subjects by work schedule
Variable | Male | Female | ||
|---|---|---|---|---|
Day work | Shift work | Day work | Shift work | |
Total | 1707 (79.9) | 503 (20.1) | 1133 (86.4) | 161 (13.6) |
Age (years) a,b | ||||
20–29 | 108 (11.1) | 25 (9.3) | 33 (5.5) | 8 (10.1) |
30–39 | 312 (22.2) | 85 (20.1) | 93 (9.9) | 10 (5.4) |
40–49 | 376 (26.9) | 90 (22.9) | 233 (26.5) | 32 (23.7) |
50–59 | 503 (27.6) | 125 (25.8) | 346 (30.4) | 60 (38.1) |
≥60 | 408 (12.2) | 178 (21.9) | 428 (27.7) | 51 (22.8) |
Educationa | ||||
≤ Elementary school | 308 (13.7) | 109 (16.5) | 513 (38.0) | 64 (33.4) |
Middle school | 321 (17.0) | 72 (11.9) | 191 (17.5) | 24 (14.5) |
High school | 788 (51.0) | 218 (48.4) | 366 (38.4) | 62 (44.8) |
≥ College or graduate school | 290 (18.3) | 104 (23.2) | 63 (6.1) | 11 (7.3) |
Household income | ||||
Low | 190 (7.5) | 44 (7.9) | 296 (22.2) | 40 (21.4) |
Low-middle | 569 (34.3) | 162 (30.7) | 366 (32.0) | 45 (28.7) |
Middle-high | 568 (35.3) | 173 (34.4) | 289 (28.6) | 44 (29.8) |
High | 380 (22.9) | 124 (27.0) | 182 (17.2) | 32 (20.0) |
Smoking status | ||||
Non-smoker | 279 (17.3) | 90 (16.7) | 1025 (88.1) | 138 (83.0) |
Ex-smoker | 607 (31.6) | 215 (38.3) | 43 (4.7) | 7 (4.4) |
Current smoker | 821 (51.1) | 198 (45.0) | 65 (7.2) | 16 (12.7) |
Alcohol intake (per month) | ||||
Never | 216 (10.8) | 81 (14.6) | 445 (35.9) | 62 (34.8) |
≤ 1 | 314 (19.0) | 106 (19.9) | 421 (37.7) | 55 (35.0) |
2–3 | 425 (26.8) | 139 (28.1) | 183 (18.2) | 27 (17.2) |
≥4 | 752 (43.4) | 177 (37.4) | 84 (8.2) | 17 (12.9) |
Work hours per week a,b | ||||
≤ 48 | 1017 (55.8) | 174 (38.5) | 898 (77.5) | 121 (69.2) |
> 48 | 690 (44.2) | 329 (61.5) | 235 (22.5) | 40 (30.8) |
CKD b | ||||
No | 1565 (93.2) | 458 (93.1) | 1024 (91.5) | 134 (84.0) |
Yes | 142 (6.8) | 45 (6.9) | 109 (8.5) | 27 (16.0) |
BMI (kg/m2) | ||||
Underweight (< 18.5) | 40 (2.6) | 8 (1.6) | 30 (2.7) | 7 (6.2) |
Normal (18.5–25) | 1049 (61.3) | 306 (61.1) | 709 (62.3) | 99 (61.1) |
Overweight (25–30) | 553 (31.8) | 177 (34.8) | 336 (29.8) | 42 (24.9) |
Obese (≥30) | 65 (4.3) | 12 (2.6) | 58 (5.1) | 13 (7.8) |
Diabetes mellitus | ||||
No | 1500 (90.1) | 458 (87.6) | 1020 (91.9) | 145 (90.8) |
Yes | 207 (9.9) | 45 (12.4) | 113 (8.1) | 16 (9.2) |
Hypertension | ||||
No | 1119 (70.7) | 342 (71.3) | 742 (70.4) | 116 (75.3) |
Yes | 588 (29.3) | 161 (28.7) | 391 (29.6) | 45 (24.7) |
SBP (mmHg)a,b | 120.3 ± 0.46 | 119.5 ± 0.68 | 119.9 ± 0.67 | 117.3 ± 1.39 |
DBP (mmHg) a,b | 79.5 ± 0.32 | 78.7 ± 0.65 | 75.4 ± 0.37 | 73.7 ± 0.76 |
Fasting glucose (mg/dl)a,b | 100.8 ± 0.64 | 99.1 ± 0.95 | 98.0 ± 0.62 | 98.0 ± 2.33 |
Total cholesterol (mg/dl)a,b | 189.1 ± 0.98 | 188.5 ± 1.78 | 195.7 ± 1.36 | 188.8 ± 3.50 |