Data sources with regard to level of information
| Level of information | Data origin and potential information | |||||
| ZI | Quality in nephrology | Claims data | Survey of physicians | Survey of nursing staff | Survey of patients | |
| Regional influencing factors | Yes | Yes | Yes | – | – | – |
| Influencing factors regarding care providers (medical practices, physicians) | Yes (eg, type of practice, number of physicians, number of patients, structure of patient population) | Yes (eg, number of patients, structure of patient population) | - | Yes | Yes | – |
| Influencing factors regarding nursing staff | – | – | – | Yes | Yes | – |
| Influencing factors regarding patients | Yes (eg, age, sex, insurance status, comorbidities) | Yes (eg, age, sex, comorbidities, nutritional status, clinical characteristics) | Yes (eg, accompanying disease/s, age, sex, income, education) | Yes | Yes | Yes |
| Cost comparison of HD and PD | – | – | Yes | – | – | – |
| Advantages | Data at an individual patient level, all patients insured by statutory health insurance in Germany, all care providers | Clinical data at an individual patient level, up-to-date (without delay) | Cross-sectoral data at an individual patient level | Information about the physicians’ attitudes and perspectives | Information about the nursing staff’s attitudes and perspectives | Information about the patients’ attitudes and perspectives |
| Disadvantages | Not cross-sectoral, no clinical parameters | Only KfH patients, not cross-sectoral | No information about care providers | Selection bias (if applicable) | Selection bias (if applicable) | Selection bias (if applicable) |