Table 2.
Sample characteristics of smoking parameters by body mass index and sex categories in UK Biobank ever smokers (current plus former smokers). Data are mean (standard deviation)
| Smoking parameters |
Total (n=169 056) |
Body mass index category | Sex | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Underweight (<18.5; n=816) |
Normal (18.5-25.0; n=49 017) |
Overweight (25.0-30.0; n=74 439) |
Obese (>30.0; n=44 784) |
Female (n=81 091) | Male (n=87 965) | ||||
| Age started smoking (years) | 17.3 (4.2) | 17.5 (4.8) | 17.6 (4.2) | 17.3 (4.2) | 17.1 (4.3) | 17.8 (4.4) | 16.9 (4.0) | ||
| No of cigarettes smoked per day | |||||||||
| Ever smokers | 18.4 (10.1) | 16.6 (10.5) | 15.9 (8.6) | 18.2 (9.6) | 21.1 (11.5) | 16.1 (8.2) | 20.5 (11.2) | ||
| Current smokers* | 15.8 (8.4) | 16.8 (11.1) | 15.0 (8.2) | 15.6 (8.1) | 17.3 (9.0) | 14.2 (7.3) | 17.4 (9.2) | ||
*
N=37 519 current smokers.