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Table 4 Frequency of rib fracture in relation to tumor-chest wall distance

From: Rib fracture after stereotactic radiotherapy on follow-up thin-section computed tomography in 177 primary lung cancer patients

Tumor-chest wall distance(mm)

Crude frequency

Frequency at 24 months by Kaplan-Meier method

≤25

41/148(27.8%)

33.2%

≤16

30/131(31.3%)

37.1%

0

22/60(36.7%)

51.8%

  1. *The numbers in the parentheses in frequency are percentages.