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| Family history | Cases | Controls | χ2 | P value |
| Hypertension | 1.258 | 0.262 | ||
| Yes | 139 (31.0%) | 124 (27.6%) | ||
| No | 309 (69.0%) | 325 (72.4%) | ||
| Diabetes | 0.180 | 0.671 | ||
| Yes | 48 (10.7%) | 52 (11.6%) | ||
| No | 401 (89.3%) | 397 (88.4%) | ||
| CHD | 3.532 | 0.060 | ||
| Yes | 42 (9.4%) | 27 (6.0%) | ||
| No | 407 (90.6%) | 422 (94.0%) | ||
| Stroke | 0.0187 | 0.891 | ||
| Yes | 28 (6.2%) | 29 (6.5%) | ||
| No | 421 (93.8%) | 420 (93.5%) |
CHD: coronary heart disease.
