Notably, additional RT was associated with worse outcomes in T1a patients, while in T1b patients, it showed only a nonsignificant trend toward improved survival.
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Survival analysis of additional radiotherapy after endoscopic therapy in patients with T1N0M0 esophageal cancer.
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The sentences
Subgroup analysis indicated that T1a patients did not benefit from RT, while T1b patients showed a slight trend toward improvement, but without statistical significance.