Interconversion of two commonly used performance tools: An analysis of 5844 paired assessments in 1501 lung cancer patients

Table 4 Comparison of the performance of various suggested Karnofsky performance status categories (for interconversion to the Eastern Cooperative Oncology Group performance status scale) in the current cohort

Author, year	Hit rate1	κw1
AJCC et al[34], 1977	43.60%	0.376 (0.363-0.389) P < 0.0001
Minna et al[20], 1985	75.20%	0.701 (0.687-0.714) P < 0.0001
Buccheri et al[10], 1996	83.20%	0.695 (0.679-0.711) P < 0.0001
Ma et al[19], 2010	75.20%	0.701 (0.687-0.714) P < 0.0001
de Kock et al[18], 2013	43.20%	0.079 (0.068-0.090) P < 0.0001
Current study	78.10%	0.749 (0.736-0.762) P < 0.0001

¹Performance in the current cohort shown as hit rate (%) or weighted kappa (95% confidence limits) along with the P-value.