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Responses to the question ‘Do you know when this inhaler needs replacing?’ for dry powder and metered dose inhalers. This refers to the patient's opinion.
| Answer | Number of responses for dry powder inhaler (DPI) (n = 68) | Number of responses for metered dose inhaler (MDI) (n = 125) |
|---|---|---|
| Yes | 59 (87%) | 75 (60%) |
| No | 9 (13%) | 50 (40%) |
