Causes of metered-dose inhaler misuse
| Cause of misuse | n | % |
| Omissions | ||
| No removal of cap | 16 | 0 |
| Inhaler not held correctly | 260 | 7 |
| Device not actuated at the beginning of inspiration¶ | 748 | 19 |
| No slow inspiratory flow | 1348 | 34 |
| No complete inspiration | 919 | 23 |
| >1 puff | 739 | 19 |
| No 5-s breath-holding period at the end of inspiration | 1753 | 44 |
| Errors | ||
| Forced expiration | 1077 | 27 |
| No expiration | 440 | 11 |
| Inspiration by nose# | 480 | 12 |
| Actuation at the end of inspiration# | 708 | 18 |
| No inspiration# | 224 | 6 |
#: one positive answer to at least one of these questions
¶: a negative answer to this question defined poor coordination
n=3955