Table 3.
The Distribution of the Number of Patients’ Technique Error with Different DPIs
| DPIs | P -value | |||
|---|---|---|---|---|
| HAN (n=29) | TUR(n=29) | DIS (n=27) | ||
| The number of technique errors | ||||
| 0 | 8 (27.6) | 9 (31.0) | 12 (44.4) | 0.164 |
| 1 | 9 (31.0) | 4 (13.8) | 5 (18.5) | |
| 2 | 10 (34.5) | 7 (24.1) | 8 (29.6) | |
| 3 | 2 (6.9) | 5 (17.2) | 2 (7.4) | |
| 4 | 0 (0.0) | 4 (13.8) | 0 (0.0) | |
| The number of breathing-related steps errors | ||||
| 0 | 8 (27.6) | 11 (37.9) | 13 (48.1) | 0.244 |
| 1 | 11 (37.9) | 12 (41.4) | 8 (29.6) | |
| 2 | 9 (31.0) | 6 (20.7) | 6 (22.2) | |
| 3 | 1 (3.4) | 0 (0.0) | 0 (0.0) | |
| The number of non-breathing-related steps errors | ||||
| 0 | 26(89.7) | 13 (44.8) | 21 (77.8) | <0.001* |
| 1 | 3 (10.3) | 8 (27.6) | 5 (18.5) | |
| 2 | 0 (0.0) | 7 (24.1) | 1 (3.7) | |
| 3 | 0 (0.0) | 1 (3.4) | 0 (0.0) | |
Notes: Data are presented as numbers (percentages); Performed by Kruskal–Wallis test; *There was a significant difference in the distribution of the number of non-breathing-related steps errors among the three devices (P<0.001), and further paired comparisons found that significant difference between HAN and TUR (P <0.001), and HAN and DIS (P <0.001).
Abbreviations: DPI, Dry Powder Inhaler; HAN, HandiHaler®; TUR, Turbuhaler®; DIS, Diskus®.