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Mean percentage of gaps and maximal gap length
| Variable | Intervention | Control | P value |
|---|---|---|---|
| Mean (SD) gaps for puff inhalers [%] | 3.2 (4.7)a | 11.7 (18.6)c | .008 |
| Mean (SD) gaps for inhalation with dry powder capsules [%] | 4.6 (4.4)b | 9.8 (8.9)d | .009 |
| Mean (SD) maximal gap length for puff inhalers [days] | 1.6 (2.0)a | 11.6 (25.6)c | .025 |
| Mean (SD) maximal gap length for dry powder capsules [days] | 2.6 (2.7)b | 5.9 (5.2)d | .002 |
an = 57; bn = 41; cn = 60; dn = 49
