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Multivariate Cox HR for OS and PFS in LS-SCEC. CT, chemotherapy; CT+RT, chemotherapy plus radiotherapy; CT+S, chemotherapy plus surgery; EP, etoposide plus cisplatin or carboplatin; HR, hazard ratio; KPS, Karnofsky performance status; LS-SCEC, limited-stage small cell esophageal carcinoma; OS, overall survival; PFS, progression-free survival.
