Additional file 1 of Prevalence and concordance of HER2-low and HER2-ultralow status between historical and rescored results in a multicentre study of breast cancer patients in China

Supplementary Material 1: Additional file 1: Table S1: Baseline demographics and characteristics. Table S2. Kappa concordance value by individual local sites for HER2 IHC category. Table S3. Kappa concordance value by individual local sites for HER2 expression status. Table S4. Concordance between the leading center and the local sites on re-stained slides for HER2 expression level (including HER2-null and HER2-ultralow). Table S5. Concordance of historical slides and re-stained slides scored at the local sites for HER2 IHC category and HER2 expression level. Table S6. Concordance between re-stained slides scored at the leading center and historical slides rescored at the local sites for HER2 IHC category and HER2 expression level. Table S7. Histopathological and clinicopathological characteristics in the rescored/FUSCC group. Figure S1: HER2 scoring scheme and nomenclature.