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Reported frequency of use of sputum adjunct devices for patients with COPD in the preceding year
| No of patients treated with device | ||||
| None | 1–2 | 3–5 | >5 | |
| Flutter | 59.5% | 18.0% | 8.1% | 14.4% |
| Acapella | 47.8% | 22.5% | 8.1% | 21.6% |
| PEP mask | 79.3% | 15.3% | 3.6% | 1.8% |
