Variable |  | N (%) | Mean ± SD | p-value |
---|---|---|---|---|
Gender | Men | 768 (79.8) | 26.25 ± 7.65 | < 0.01 |
Women | 194 (20.2) | 22.61 ± 7.15 |  | |
Marriage | Single | 530 (53.5) | 24.59 ± 7.39 | 0.01 |
Married | 461 (46.5) | 26.25 ± 7.97 |  | |
Age (years) | <  20 | 17 (1.7) | 22.77 ± 8.59 | 0.01 |
20–29 | 299 (30.5) | 24.74 ± 7.82 |  | |
30–39 | 420 (42.9) | 25.23 ± 8.04 |  | |
40–49 | 190 (19.4) | 27.10 ± 6.85 |  | |
50–59 | 49 (5.0) | 26.69 ± 6.47 |  | |
Education | Less than high school | 413 (42.2) | 24.91 ± 8.05 | 0.04 |
College | 308 (31.5) | 24.44 ± 7.28 |  | |
University | 258 (26.4) | 26.47 ± 7.47 |  | |
Salary (US dollar/month) | <  2000 | 345 (38.4) | 23.78 ± 8.14 | < 0.01 |
2000–3000 | 371 (41.3) | 26.06 ± 7.13 |  | |
≥ 3000 | 183 (20.4) | 26.70 ± 7.24 |  |