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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

  Body mass index (kg/m2)  
  <20 20 to 24.9 25 to 29.9 30 to 34.9 ≥35 All
  n = 44,787 n = 509,874 n = 420,712 n = 145,551 n = 58,015 n = 1,178,939
Baseline characteristics       
   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)       
   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
  1. Percentages are calculated based on women with complete information for that specific variable.