Table 1.
Characteristics of the sample
| Characteristic | Coding | No. (%) |
|---|---|---|
| Sex | Males | 197 (46.7) |
| Females | 225 (53.3) | |
| Age (yr) | 18–24 | 100 (23.8) |
| 25–34 | 136 (32.3) | |
| 35–44 | 121 (28.7) | |
| 45–57 | 64 (15.2) | |
| Education | Primary school | 69 (16.6) |
| Middle school | 97 (23.3) | |
| High school | 72 (17.3) | |
| Vocational school | 72 (17.3) | |
| University | 106 (25.5) | |
| Body mass index (kg/m2)a | Normal (≤ 22.9) | 192 (45.6) |
| Overweight (23.0–24.9) | 68 (16.2) | |
| Obese (≥ 25.0) | 161 (38.2) | |
| Smoking | Never smoked | 306 (72.5) |
| Ex-smoker | 18 (4.3) | |
| Regular smoker | 98 (23.2) | |
| Alcohol consumption | Does not consume alcohol | 206 (49.2) |
| Occasionally | 102 (24.3) | |
| Monthly | 63 (15.0) | |
| Weekly | 48 (11.5) | |
| Factory section | Cold storage | 166 (39.6) |
| Production room | 152 (36.3) | |
| Office | 95 (22.7) | |
| Other | 6 (1.4) | |
| Job category | Forklift driver | 33 (8.2) |
| Storage worker | 95 (23.5) | |
| Manufacturing worker | 142 (35.1) | |
| Office staff | 134 (33.2) | |
| Employment years | 0–1.9 | 139 (33.2) |
| 2–9.9 | 138 (32.9) | |
| 10 + | 142 (33.9) | |
| Working hours/day | 0–9.9 | 197 (47.1) |
| 10+ | 221 (52.9) | |
| Physical strain at work | Light sitting | 141 (33.5) |
| Other light | 98 (23.3) | |
| Medium heavy | 111 (26.4) | |
| Heavy | 71 (16.9) | |
| All | 422 |
a Classified according to World Health Organization [19]
One participant had missing information on age, one for body mass index, one for work strain, three for alcohol consumption, three for factory section, three for employment years, four for working hours and six for educational class, and for 18 participants information on job category was missing or remained indeterminate