Table 1.

The Correlation Coefficient Between Item Scores and Domain Scores of mCOPD-PRO

Item No.	Physiological Domain	Psychological Domain	Environmental Domain
1	0.579	0.419	0.355
2	0.555	0.329	0.368
3	0.725	0.433	0.469
4	0.771	0.442	0.477
5	0.758	0.440	0.467
6	0.709	0.508	0.519
7	0.750	0.532	0.513
8	0.657	0.525	0.486
9	0.429	0.269	0.232
10	0.555	0.337	0.451
11	0.431	0.360	0.287
12	0.534	0.396	0.358
13	0.683	0.516	0.543
14.1	0.705	0.538	0.486
14.2	0.775	0.556	0.516
14.3	0.766	0.507	0.520
14.4	0.773	0.508	0.539
15	0.544	0.732	0.492
16	0.570	0.698	0.526
17	0.582	0.670	0.465
18.1	0.549	0.858	0.554
18.2	0.509	0.902	0.510
18.3	0.504	0.888	0.525
18.4	0.509	0.892	0.544
19	0.607	0.588	0.709
20	0.439	0.366	0.755
21	0.484	0.510	0.808

Notes: Data are expressed as correlation coefficient; all P-values<0.001.

Abbreviation: mCOPD-PRO, modified patient-reported outcome scale for chronic obstructive pulmonary disease.