Table 3.
The combination of body mass index (BMI) and leisure-time physical activity/exercise in relation to risk of acute myocardial infarction. All cases and all controls.
BMI < 20 | 20 ≤ BMI < 25 | 25 ≤ BMI < 30 | BMI ≥ 30 | |||||||||
Leisure-time physical activity/exercise | cases/controls | OR | 95% CI | cases/controls | OR | 95% CI | cases/controls | OR | 95% CI | cases/controls | OR | 95% CI |
All | ||||||||||||
Very little, occasional walks¶ | 57/42 | 1.50 | 0.97–2.34 | 326/394 | 1* | 401/423 | 1.19 | 0.96–1.46 | 211/178 | 1.55 | 1.20–2.01 | |
Now and then, once per week | 18/24 | 1.09 | 0.57–2.08 | 141/343 | 0.56 | 0.44–0.73 | 214/330 | 0.88 | 0.69–1.11 | 63/73 | 1.20 | 0.82–1.76 |
Twice per week or more | 6/13 | 0.62 | 0.23–1.68 | 79/263 | 0.44 | 0.32–0.59 | 103/181 | 0.79 | 0.59–1.06 | 35/27 | 1.85 | 1.07–3.18 |
Men | ||||||||||||
Very little, occasional walks† | 21/24 | 0.88 | 0.47–1.66 | 217/238 | 1 | 290/303 | 1.13 | 0.88–1.45 | 121/98 | 1.47 | 1.05–2.05 | |
Now and then, once per week | 9/10 | 1.20 | 0.47–3.08 | 96/206 | 0.57 | 0.42–0.79 | 165/232 | 0.90 | 0.68–1.19 | 41/43 | 1.20 | 0.74–1.94 |
Twice per week or more | 3/8 | 0.56 | 0.14–2.18 | 61/203 | 0.41 | 0.29–0.59 | 90/138 | 0.85 | 0.61–1.19 | 25/20 | 1.70 | 0.90–3.22 |
Women | ||||||||||||
Very little, occasional walks† | 36/18 | 2.40 | 1.25–4.62 | 109/156 | 1 | 111/120 | 1.32 | 0.91–1.93 | 90/80 | 1.65 | 1.09–2.48 | |
Now and then, once per week | 9/14 | 1.02 | 0.40–2.58 | 45/137 | 0.53 | 0.34–0.82 | 49/98 | 0.77 | 0.49–1.20 | 22/30 | 1.21 | 0.64–2.28 |
Twice per week or more | 3/5 | 0.62 | 0.14–2.80 | 18/60 | 0.49 | 0.26–0.90 | 13/43 | 0.50 | 0.25–1.01 | 10/7 | 2.11 | 0.74–6.02 |
OR-odds ratio; CI-confidence interval
* The normal-weight (20 ≤ BMI < 25) and sedentary group was used as the reference category in all analyses.
¶ Adjusted for age, hospital catchment area, socioeconomic status, smoking and sex
† Adjusted for age, hospital catchment area, socioeconomic status and smoking