Fig. 1.—
Changes in response to salbutamol expressed as percentage of predicted (% pred) normal in the chronic obstructive pulmonary disease group as a whole (, n=84), as well as in its severe (└, n=36) and moderate (□, n=48) subgroups. Values are presented mean±sem. FEV1: forced expiratory volume in one second; FVC: forced vital capacity; SVC: slow vital capacity; IC: inspiratory capacity; RV: residual volume; FRC: functional residual capacity; TLC: total lung capacity. #: p<0.0005, **: p<0.1, significant changes from pre- to postbronchodilator; *: p<0.05; ¶: p=0.08.