Table 1. Comparisons of general characteristics between controls and cases.
| Variables | Control (n=520) | Cases (n=450) | t/χ2 | P-value |
|---|---|---|---|---|
| Sex | 4.554 | 0.033 | ||
| Male | 160 (44.6%) | 168 (37.3%) | ||
| Female | 359 (55.4%) | 282 (62.7%) | ||
| Age (y) | 46.8±13.3 | 45.7±12.5 | 1.646 | 0.187 |
| Smoking | 1.244 | 0.265 | ||
| Yes | 70 (13.5%) | 72 (16.0%) | ||
| No | 450 (86.5%) | 378 (84.0%) | ||
| Alcohol consumption | 4.719 | 0.030 | ||
| No | 192 (36.9%) | 197 (43.8%) | ||
| Yes | 328 (63.1%) | 253 (56.3%) | ||
| Exercise/week | 7.702 | 0.103 | ||
| None | 270 (51.9%) | 206 (45.8%) | ||
| One | 98 (18.8%) | 117 (26.0%) | ||
| Twice | 75 (14.4%) | 66 (14.7%) | ||
| More | 77 (14.8%) | 61 (13.5%) | ||
| Salt intake | 0.155 | 0.925 | ||
| Low | 184 (35.4%) | 155 (34.4%) | ||
| Moderate | 275 (52.9%) | 239 (53.1%) | ||
| High | 61 (11.7%) | 49 (10.9%) | ||
| Education | 0.106 | 0.999 | ||
| None or primary | 145 (27.9%) | 128 (28.4%) | ||
| Middle | 172 (33.1%) | 150 (33.3%) | ||
| High | 134 (25.8%) | 112 (24.9%) | ||
| College | 69 (13.2%) | 60 (13.3%) | ||
| Marriage | 0.131 | 0.937 | ||
| Unmarried | 180 (34.8%) | 159 (35.3%) | ||
| Married | 322 (62.0%) | 277 (61.6%) | ||
| Others | 18 (3.2%) | 14 (3.1%) |