Table 1 Groups of COPD patients recruited for the adaptation and validation of the German CRQ
| Â | Number of patients | Recruitment sites | Objective |
|---|---|---|---|
Group 1 | 44 | 4 pulmonary rehabilitation centres and one University hospital in Switzerland, Germany and Austria | Pilot testing of CRQ formats during translation and adaptation process |
Group 2 | 80 | 4 pulmonary rehabilitation centres in Switzerland, Germany and Austria | Internal consistency reliability and cross-sectional validity of CRQ formats |
Group 3 | 38 | One outpatient service of a University hospital and three private practices in Switzerland and Germany | Test-retest reliability of CRQ formats |