Table 4.
Rates and relative risk of incident stroke by number of health behaviours, adjusted by age, sex, and BMI, systolic blood pressure, cholesterol, diabetes mellitus, social class category (manual and non-manual), and aspirin use stratified by sex, age, body mass index, and social class in men and women aged 40-79 without known stroke and myocardial infarction in EPIC-Norfolk 1993-2007, Cox regression model
| Category | Events/No of participants | Health behaviour score | P value | ||||
|---|---|---|---|---|---|---|---|
| 4 | 3 | 2 | 1 | 0 | |||
| By sex | |||||||
| Male | 289/8967 | 1.0 | 1.05 (0.71 to 1.54) | 1.35 (0.92 to 1.98) | 1.84 (1.20 to 2.82) | 1.48 (0.62 to 3.53) | 0.012 |
| Female | 310/11 073 | 1.0 | 1.21 (0.85 to 1.71) | 1.82 (1.29 to 2.59) | 2.58 (1.73 to 3.84) | 3.49 (1.71 to 7.12) | <0.001 |
| By age group | |||||||
| <65 years | 194/14 178 | 1.0 | 1.27 (0.83 to 1.93) | 2.02 (1.32 to 3.08) | 1.92 (1.10 to 3.37) | 4.48 (2.06 to 9.76) | <0.001 |
| ≥65 years | 405/5862 | 1.0 | 1.06 (0.77 to 1.48) | 1.39 (1.01 to 1.93) | 2.22 (1.56 to 3.15) | 1.48 (0.67 to 3.27) | <0.001 |
| By BMI | |||||||
| <25 | 222/8096 | 1.0 | 0.83 (0.57 to 1.22) | 1.28 (0.87 to 1.88) | 1.62 (1.04 to 2.54) | 2.76 (1.34 to 5.69) | 0.001 |
| 25-30 | 283/9091 | 1.0 | 1.41 (0.95 to 2.10) | 1.85 (1.24 to 2.76) | 2.65 (1.70 to 4.13) | 1.29 (0.39 to 4.22) | <0.001 |
| ≥30 | 94/2853 | 1.0 | 2.17 (0.84 to 5.65) | 2.67 (1.05 to 6.84) | 4.12 (1.53 to 11.12) | 4.59 (1.08 to 19.53) | 0.036 |
| By social class | |||||||
| Non-manual | 351/12 182 | 1.0 | 1.12 (0.81 to 1.55) | 1.73 (1.25 to 2.39) | 2.38 (1.63 to 3.47) | 3.23 (1.59 to 6.55) | <0.001 |
| Manual | 248/7858 | 1.0 | 1.20 (0.78 to 1.84) | 1.42 (0.93 to 2.18) | 2.02 (1.27 to 3.22) | 1.61 (0.66 to 3.89) | 0.022 |