5. Risk of bias assessment according to QUIPS (Quality in Prognostic Studies) for progression‐free survival (PFS) in primary debulking surgery (PDS) studies.
| Study |
Study participation |
Study attrition |
Prognostic factor measurement |
Outcome measurement |
Adjustment for other prognostic factors |
Statistical analysis and reporting |
| Chang 2012a | Low | Unclear | Low | Unclear | Low | High |
| Chang 2012b | Low | Unclear | Low | Unclear | Unclear | High |
| Cuylan 2018 | Low | Unclear | Unclear | Unclear | Low | High |
| Feng 2016 | Low | Unclear | Low | Unclear | Unclear | High |
| Klar 2016 | Low | Unclear | Unclear | Unclear | Unclear | High |
| Luger 2020 | Low | Unclear | Low | Unclear | Low | High |
| McGuire 1995 | Low | Unclear | Low | Unclear | Unclear | High |
| Paik 2018 | Low | Unclear | Low | Unclear | Unclear | High |
| Peiretti 2010 | Low | Unclear | Low | Unclear | High | High |
| Polterauer 2012 | Low | Unclear | Unclear | Unclear | Low | Unclear |
| Shim 2016 | High | Unclear | Low | Unclear | High | High |
| Tewari 2016 | Low | Unclear | Low | Unclear | Low | High |
| Tseng 2018 | Low | Unclear | Low | Unclear | Low | High |
| Wimberger 2010 | Low | Unclear | Low | Unclear | Unclear | High |
| Winter 2007 | Low | Unclear | Low | Unclear | Unclear | Unclear |
| Winter 2008 | Low | Unclear | Low | Unclear | Unclear | Unclear |