Table 1 Baseline characteristics and details of follow-up for coronary heart disease (CHD), by body mass index.
From: Body mass index and incident coronary heart disease in women: a population-based prospective study
| Â | Body mass index (kg/m2) | Â | ||||
|---|---|---|---|---|---|---|
|  | <20 | 20 to 24.9 | 25 to 29.9 | 30 to 34.9 | ≥35 | All |
| Â | n = 44,787 | n = 509,874 | n = 420,712 | n = 145,551 | n = 58,015 | n = 1,178,939 |
Baseline characteristics | Â | Â | Â | Â | Â | Â |
   Age (years), mean (SD) | 55.9 (5.0) | 55.8 (4.8) | 56.2 (4.8) | 56.2 (4.8) | 55.6 (4.6) | 56.0 (4.8) |
   Current smoker,% | 32.6 | 21.5 | 19.1 | 16.8 | 15.0 | 20.2 |
   Lowest third of socioeconomic status,% | 32.4 | 28.1 | 32.7 | 38.4 | 44.9 | 32.0 |
   Non-drinker of alcoholic beverage,% | 26.4 | 19.0 | 22.8 | 29.8 | 37.5 | 22.9 |
   Rarely/never engage in strenuous physical activity,% | 47.0 | 41.6 | 48.8 | 57.4 | 64.1 | 47.4 |
Follow-up (excluding first 4 years) | Â | Â | Â | Â | Â | Â |
   Person-years for first coronary event (1,000s) | 223 | 2,592 | 2,105 | 716 | 280 | 5,916 |
   Person-years for CHD death (1,000s) | 225 | 2,618 | 2,134 | 729 | 285 | 5,992 |
   Women with first coronary event, n | 999 | 11,005 | 12,498 | 5,363 | 2,600 | 32,465 |
   Women with CHD as underlying cause of death, n | 117 | 811 | 856 | 377 | 270 | 2,431 |