Table A1.

Association with intra-test difference in pulmonary function after bronchodilator

	Difference in FVC with BD			Difference in FEV1 with BD
Predictors	Coefficient	95% CI	p-value	Coefficient	95% CI	p-value
Age	−0.001	−0.002 to 0	0.06	−0.003	−0.007 to 0.002	0.27
Male gender	0.024	0.005 to 0.043	0.01	−0.005	−0.092 to 0.081	0.90
Smoking	0.016	−0.03 to 0.035	0.09	−0.027	−0.112 to 0.059	0.54
Asthma	−0.008	−0.039 to 0.023	0.61	−0.005	−0.15 to 0.14	0.94
COPD	−0.001	−.025 to 0.024	0.94	−0.014	−0.125 to 0.097	0.80
Bronchodilator	0.003	−0.016 to 0.022	0.74	0.012	−0.073 to 0.098	0.77
ICS	−0.005	−0.028 to 0.017	0.63	0.009	−0.093 to 0.111	0.86
LTOT	0.014	−0.04 to 0.032	0.13	−0.043	−0.126 to 0.039	0.30
Cough	−0.012	−0.048 to 0.024	0.51	−0.032	−0.138 to 0.074	0.55
Crackles	0.019	−0.027 to 0.065	0.83	0.017	−0.197 to 0.23	0.87
Wheezing	0.061	0.014 to 0.107	0.01	0.023	−0.194 to 0.024	0.83

Abbreviations: BD, bronchodilators; COPD, chronic obstructive pulmonary disease; FVC, forced vital capacity; FEV1, forced expiratory volume in one second; ICS, inhaled corticosteroids; LTOT, long-term oxygen therapy.