Table 2.
Clinical characteristics of participants at baseline (n = 418).
| Variables | All patients | Adherence group | Nonadherence group | P value |
|---|---|---|---|---|
| FEV1 (L) | 1.12 ± 0.39 | 1.13 ± 0.35 | 1.11 ± 0.42 | 0.072 |
| FEV1% | 48.9 ± 12.4 | 48.3 ± 12 | 49.7 ± 13 | 0.243 |
| FVC (L) | 2.36 ± 0.56 | 2.35 ± 0.5 | 2.38 ± 0.63 | 0.108 |
| FEV1/FVC% | 47.9 ± 10.7 | 48.9 ± 10.3 | 46.4 ± 11.1 | 0.751 |
| 6MWD | 324.3 ± 57.7 | 340.7 ± 64 | 300.6 ± 33.8 | <0.001∗ |
| CAT | 20.2 ± 7.7 | 19.6 ± 7.9 | 20.8 ± 7.3 | 0. 155 |
| mMRC | 2.4 ± 0.9 | 2.16 ± 0.9 | 2.69 ± 0.8 | 0.146 |
| BDI | 9.6 ± 5.4 | 8.3 ± 4.9 | 11.8 ± 5.4 | 0.021∗ |
| SAI | 38.5 ± 10.6 | 39.2 ± 10.4 | 38 ± 10.8 | 0.340 |
| TAI | 43.5 ± 10.7 | 43.8 ± 11 | 43.2 ± 10.6 | 0.363 |
| Exacerbation | 2.9 ± 1.6 | 2.7 ± 1.5 | 3.3 ± 1.7 | 0.004∗ |
| Hospitalization | 2.2 ± 1.4 | 2.3 ± 1.4 | 2.1 ± 1.6 | 0.374 |
| Emergency visit | 1.8 ± 0.9 | 1.7 ± 1.0 | 1.9 ± 1.2 | 0.280 |
Note. FVC: forced vital capacity (FVC) and FEV1: forced expiratory volume in 1 s. 6MWD: 6-minute walking distance; CAT, COPD assessment test; mMRC, modified Medical Research Council scale; BDI, Beck Depression Inventory; SAI, State Anxiety Inventory; and TAI, Trait Anxiety Inventory. For continuous variables, the results are expressed as mean ± standard deviation. A P value less than 0.05 is considered statistically significant and indicated by an asterisk (∗).