Table 1.
Baseline characteristics of eligible individuals from the UK CPRD cohort and the US GE Centricity cohort by BMI category.
| UK BMI (kg m−2) | US BMI (kg m−2) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Normal weight 18.5–<25 | Overweight 25–<30 | Class I Obesity 30–<35 | Class II Obesity 35–<40 | Class III Obesity 40–70 | Normal weight 18.5–<25 | Overweight 25–<30 | Class I Obesity 30–<35 | Class II Obesity 35–<40 | Class III Obesity 40–70 | |
| n (%) | 690,704 (36.8) | 656,219 (34.9) | 335,828 (17.9) | 127,675 (6.8) | 67,591 (3.6) | 1,239,819 (28.1) | 1,437,269 (32.6) | 929,329 (21.0) | 451,941 (10.2) | 356,525 (8.1) |
| Female, % | 65.3 | 50.6 | 53.6 | 62.6 | 70.9 | 72.9 | 54.2 | 54.8 | 62.5 | 70.5 |
| Start age, years | 47.5 | 53.3 | 53.5 | 51.4 | 49.0 | 43.8 | 48.5 | 49.2 | 48.2 | 46.7 |
| Mean BMI, kg m−2 | 22.3 | 27.3 | 32.1 | 37.0 | 44.6 | 22.5 | 27.4 | 32.2 | 37.2 | 45.8 |
| Mean study length, days | 1,746 | 1,871 | 1,881 | 1,869 | 1,843 | 1,509 | 1,563 | 1,583 | 1,584 | 1,565 |
Data are observed means or n numbers. BMI, body mass index.