First author [Ref.] | Ex-smokers | Smokers | Weight % | ||
Subjects n | FEV1% pred | Subjects n | FEV1 % pred | ||
Gamble 11 | 21 | 57.54±11.18 | 30 | 53.65±9.87 | 64.84 |
Hattotuwa 10 | 10 | 46.60±15.56 | 27 | 45.89±12.44 | 19.92 |
O’Shaughnessy 3 | 5 | 56.76±12.19 | 8 | 61.52±8.68 | 15.24 |
Data are presented as mean±sd, unless otherwise stated. The percentage weighting is based on the precision and sample size of the mean estimate of each trial. % pred: % predicted.