Subgroup analysis of distribution differences by region
| Characteristics | Rural | Urban | ||
| OR (95% CI) | P value | OR (95% CI) | P value | |
| Sex (male) | 2.51 (2.27 to 2.79) | ＜0.001 | 1.56 (1.43 to 1.70) | ＜0.001 |
| Family history of stroke | 2.10 (1.91 to 2.32) | ＜0.001 | 2.44 (2.23 to 2.66) | ＜0.001 |
| TIA | 1.31 (1.15 to 1.48) | ＜0.001 | 1.51 (1.34 to 1.70) | ＜0.001 |
| Hypertension | 1.24 (1.11 to 1.39) | ＜0.001 | 1.32 (1.19 to 1.45) | ＜0.001 |
| BMI | 0.92 (0.87 to 0.97) | 0.002 | 0.87 (0.83 to 0.92) | ＜0.001 |
| Dyslipidaemia | 0.77 (0.71 to 0.84) | ＜0.001 | 0.75 (0.69 to 0.82) | ＜0.001 |
| Diabetes | 0.73 (0.66 to 0.80) | ＜0.001 | 0.78 (0.72 to 0.85) | ＜0.001 |
| Family history of CHD | 0.21 (0.18 to 0.23) | ＜0.001 | 0.28 (0.25 to 0.32) | ＜0.001 |
| Lack of exercise | 0.88 (0.81 to 0.96) | 0.004 | …… | …… |
| Smoking | 0.55 (0.49 to 0.61) | ＜0.001 | …… | …… |
| AF | 0.38 (0.30 to 0.48) | ＜0.001 | …… | …… |
AF, atrial fibrillation; BMI, body mass index; CHD, coronary heart disease; TIA, transient ischaemic attack.