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Table 1 Inter-observer reproducibility between two pathologists based on the new nasopharyngeal carcinoma (NPC) histopathologic classification, stratified by area of case origin

From: A new prognostic histopathologic classification of nasopharyngeal carcinoma

Case origin Consistent (cases) Inconsistent (cases) Reproducibility (%)
Sun Yat-sen University Cancer Center (SYSUCC) 3067 325 90.3
Other hospitals in mainland China 582 53 91.7
Hong Kong, Taiwan, Singapore 535 77 87.4
Total 4187 455 90.2
  1. In all, 4642 out of the 7565 patients in the initial database were assessed for the initial calculation of reproducibility