Reasons for Lack of Acceptability of Forced Expiratory Blows in the Intervention and Control Groups
| Reason | Period 1 | Period 2 | Period 3 | Period 4 | Period 5 | All Periods |
|---|---|---|---|---|---|---|
| a From multilevel logistic regression analysis. | ||||||
| e-Learning + feedback, blow (test), n | 306 (102) | 330 (113) | 261 (87) | 273 (91) | 291 (97) | 1470 (490) |
| Usual practice, blow (test), n | 348 (116) | 456 (152) | 348 (116) | 405 (135) | 378 (126) | 1935 (645) |
| Blows with poor start | ||||||
| e-Learning + feedback, n (%) | 21 (20.6) | 23 (20.4) | 19 (21.8) | 16 (17.6) | 16 (16.5) | 95 (19.4) |
| Usual practice, n (%) | 27 (23.3) | 33 (21.7) | 28 (24.1) | 37 (27.4) | 25 (19.8) | 150 (23.3) |
| P valuea | 0.857 | 0.931 | 0.933 | 0.095 | 0.664 | 0.474 |
| Blows with artifacts during exhalation | ||||||
| e-Learning + feedback, n (%) | 11 (10.8) | 23 (20.4) | 18 (20.7) | 17 (18.7) | 14 (14.4) | 83 (16.9) |
| Usual practice, n (%) | 11 (9.5) | 17 (11.2) | 13 (11.2) | 23 (17.0) | 14 (11.1) | 78 (12.1) |
| P valuea | 0.644 | 0.026 | 0.214 | 0.987 | 0.757 | 0.311 |
| Blows with unsatisfactory exhalation | ||||||
| Abrupt end | ||||||
| e-Learning + feedback, n (%) | 6 (5.9) | 15 (13.3) | 10 (11.5) | 5 (5.5) | 5 (5.2) | 41 (8.4) |
| Usual practice, n (%) | 12 (10.3) | 9 (5.9) | 3 (2.6) | 9 (6.7) | 5 (4.0) | 38 (5.9) |
| P valuea | 0.190 | 0.410 | 0.082 | 0.710 | 0.727 | 0.702 |
| Duration <6 sec or no plateau in volume-time curve | ||||||
| e-Learning + feedback, n (%) | 35 (34.3) | 38 (33.6) | 30 (34.5) | 29 (31.9) | 28 (28.9) | 160 (32.7) |
| Usual practice, n (%) | 55 (47.5) | 63 (41.4) | 44 (37.9) | 69 (51.1) | 49 (38.9) | 280 (43.4) |
| P valuea | 0.180 | 0.380 | 0.749 | 0.171 | 0.854 | 0.371 |