. 2019 May 28;29:22. doi: 10.1038/s41533-019-0135-9

Table 3.

Estimating the probability of COPD in the development cohort

Data source used in this model^a	Independent variables				Estimated P_COPD	COPD yes/no	Post-BD FEV1/FVC	Pre-BD %FEV1
Data source used in this model^a	Age	Pack-years	CAT	%PEFR	Estimated P_COPD	COPD yes/no	Post-BD FEV1/FVC	Pre-BD %FEV1
From means of our cohort
Non-COPD subjects	67	40	6	95	0.23
COPD subjects	75	51	10	63	0.75
From selected study subjects
Subject A	71	53	3	79	0.45	Yes	0.56	63
Subject B	67	20	4	74	0.36	No	0.71	82
Subject C	49	86	13	63	0.65	Yes	0.62	59
Subject D	47	21	2	78	0.14	No	0.75	79

%PEFR percent predicted peak expiratory flow rate, CAT COPD assessment test, COPD chronic obstructive pulmonary disease, P_COPD probability of COPD

^aEntering the values of the four variables into a preset computer program immediately calculates the probability of COPD