CPA1 and neoplasm: For subgroup comparisons categorized by pretreatment situation, age (median/mean age of 65), CP-A percentage (stratified by 100%,75–100%,50–75%), macrovascular invasion, tumor size (stratified by median/mean longest diameter of ≤ 2 cm and > 2 cm; and stratified by maximum diameter ≤ 5 cm and 5–6 cm), and radiation dose (median BED10 estimates of 100 Gy), no significant differences were found among comparisons for 1-year LC or 3-year LC (Additional file 1: Supplementary Fig. 3, 4).