How valid are the indicators?BMJ 2010; 341 doi: https://doi.org/10.1136/bmj.c4284 (Published 10 August 2010) Cite this as: BMJ 2010;341:c4284
- G A Gooiker, medical doctor and PhD student1,
- R A E M Tollenaar, professor of surgical oncology1
- 1Department of Surgery, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, Netherlands
Reeves and colleagues explained the rationale behind removing eight performance indicators from the UK Quality and Outcomes Framework.1 But how valid are performance indicators?
In collaboration with the Comprehensive Cancer Centre West in the Netherlands, we tested the validity of tumour positive margin rate after breast conserving surgery for breast neoplasm as an indicator in relation to the used definition (rate of focal involvement, extensive involvement, …