Table 2. Comparison by stages of handling the inhalation device among patients who made errors in inhalation techniqueInhalation technique.
| Total n (%) |
Dry powder devices n (%) |
Metered-dose inhalers n (%) |
p value* | ||
|---|---|---|---|---|---|
| Correct assembly | 0.3 | ||||
| Yes | 12 (27.9) | 9 (20.9) | 3 (7.0) | ||
| No | 31 (72.1) | 18 (41.9) | 13 (30.2) | ||
| Correct expiration | 0.06 | ||||
| Yes | 14 (32.6) | 6 (14) | 8 (18.6) | ||
| No | 29 (67.4) | 21 (48.8) | 8 (18.6) | ||
| Correct breathe-in | 0.02 | ||||
| Yes | 18 (41.8) | 16 (37.2) | 2 (4.6) | ||
| No | 25 (58.2) | 11 (25.6) | 14 (32.6) | ||
| Correct apnea | 0.45 | ||||
| Yes | 21 (48.8) | 12 (27.9) | 9 (20.9) | ||
| No | 22 (51.2) | 15 (34.9) | 7 (16.3) | ||
| Correct inhalation technique † | 0.013 | ||||
| Yes | 28 (39.5) | 25 (35.2) | 3 (4.2) | ||
| No | 43 (60.5) | 27 (38.0) | 16 (22.5) | ||
*
χ2 test or Fisher's exact test;
†
complete sample (71 patients).