Table 4.
The Correctness of Use DPIs in Overall and Disease Subgroups
| Variables | Total (n=85) | COPD (n=52) | Asthma (n=22) | ACO (n=11) | χ2 | P |
|---|---|---|---|---|---|---|
| PIF above the minimum | ||||||
| Yes | 81 (95.3) | 50 (96.2) | 21 (95.5) | 10 (90.9) | 1.220a | 0.760 |
| No | 4 (4.7) | 2 (3.8) | 1 (4.5) | 1 (9.1) | ||
| PIF optimal | ||||||
| Yes | 52 (61.2) | 29 (55.8) | 14 (63.6) | 9 (81.8) | 2.670 | 0.263 |
| No | 33 (38.8) | 23 (44.2) | 8 (36.4) | 2 (18.2) | ||
| Correct technique | ||||||
| Yes | 29 (34.1) | 14 (26.9) | 10 (45.5) | 5 (45.5) | 3.084 | 0.214 |
| No | 56 (65.9) | 38 (73.1) | 12 (54.5) | 6 (54.5) | ||
Notes: Chi-square test examined whether there are significant differences in the PIF status and operation status of patients with COPD, asthma, and overlap; aFisher‘s exact test.
Abbreviations: ACO, asthma-COPD Overlap; BMI, body mass index; COPD, Chronic obstructive pulmonary disease; PIF, peak flow rate.