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Table 2 Relationship between body surface area and dose of S-1

From: A multicenter phase III study comparing Simultaneous Integrated Boost (SIB) radiotherapy concurrent and consolidated with S-1 versus SIB alone in elderly patients with esophageal and esophagogastric cancer – the 3JECROG P-01 study protocol

Body surface area (m2)

Initial dose

<1.25

40 mg, bid

≥1.25~<1.50

50 mg, bid

≥1.5

60 mg, bid