Characteristics of the four age/sex groups
| 6–11 yr olds | 12–16 yr olds | |||
| Female | Male | Female | Male | |
| Participants n | 51 | 50 | 53 | 50 |
| Age yrs | 8.4±1.7 | 8.8±1.6 | 13.8±1.4 | 13.7±1.1 |
| Pneumo. % pred | ||||
| FEV1 | 105.0±11.9 | 103.9±12.2 | 106.1±10.9 | 98.5±11.1 |
| FVC | 98.2±11.1 | 98.9±11.1 | 98.3±11.4 | 92.8±10.2 |
| MEF50 | 90.7±20.3 | 88.7±18.5 | 99.7±19.2 | 93.7±20.7 |
Data are presented as mean±sd, unless otherwise stated. Pneumo.: pneumotachography; % pred: % predicted; FEV1: forced expiratory volume in one second; FVC: forced vital capacity; MEF50: mean expiratory flow when 50% of the FVC remains to be exhaled.