Performance status (PS) scales are used widely in oncology practice and research. We compared inter-rater agreement, between nurses and physicians, for three commonly used PS scales.
Patients attending an oncology palliative care clinic were assessed by a physician and nurse who blindly completed Eastern Cooperative Oncology Group (ECOG), Karnofsky PS (KPS), and palliative PS (PPS) scales. Patients completed the Edmonton symptom assessment system (ESAS).
Inter-rater agreement (weighted kappa) for the 457 patients was 0.67 for the ECOG, 0.74 for the KPS, and 0.72 for the PPS. There was no difference between proportions of physicians' vs. nurses' ratings of KPS, >60 vs.