Table 3.

Details of COPD Case-Finding Prediction Models

Study	Mapel et al	Kotz et al	Haroon et al	Smidth et al	TargetCOPD	PCOPD
Variables		Age			Age	Age
		Smoking	Smoking		Smoking	Smoking pack-years
	Antibiotics Respiratory and cardiovascular medications		Salbutamol	Respiratory medication	Salbutamol Antibiotics
		Asthma	Asthma	Chronic lung disease	Dyspnoea	CAT score
		Socioeconomic status	Lower Respiratory Tract Infections	Previous spirometry data		Percent predicted PEF

Abbreviations: CAT, The COPD Assessment Test; PEF, peak expiratory flow.