Table 2:

Bronchodilator pulmonary function test results

Variable	Asthma COPD overlap, mean ± SD	Isolated-asthma, mean ± SD	Isolated-COPD, mean ± SD	Neither diagnosis, mean ± SD
Pre-BDa FEV1b % predicted	67.3±14.8	80.9±13.5f	82.3±15.2f	96.9±13.2f
Post-BD FEV1 % predicted	81.3±14.5	96.2±13.7f	85.9±15.0f	100.5±13.5f
Pre-BD FVCc % predicted	93.3±15.8	87.1±13.9f	101.2±15.1f	98.3±12.9f
Post-BD FVC % predicted	101.8±14.0	96.0±13.3f	103.4±15.1	98.5±12.9f
Pre-BD FEV1/FVC	0.56±0.08	0.73±0.07f	0.62±0.07f	0.77±0.05f
Post-BD FEV1/FVC	0.62±0.07	0.78±0.05f	0.64±0.06f	0.80±0.05f
Pre-BD RVd/TLCe	0.40±0.10	0.33±0.09f	0.33±0.08f	0.28±0.07f

^aBronchodilator

^bForced expiratory volume in one second

^cForced vital capacity

^dResidual volume

^eTotal lung capacity

^fp<0.05 vs. Asthma/COPD overlap subgroup