| Number of exacerbations per participant per month | |||||||
|---|---|---|---|---|---|---|---|
| Study | Mean mucolytic group | SD | N | Mean control group | SD | N | Mean difference [95% CI] |
| Ekberg‐Jansson 1999 | 0.18 | 0.22 | 313 | 0.17 | 0.21 | 315 | 0.01 [‐0.02, 0.04] |
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