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Table 4 Results of Cox proportional hazard model analysis

From: Rib fracture after stereotactic radiotherapy for primary lung cancer: prevalence, degree of clinical symptoms, and risk factors

Independent valuable P value Hazard ratio 95% confidence interval
Tumor-chest wall distance (mm) <0.0001 0.858 0.801–0.920
Age 0.713 0.990 0.937–1.045
Gender* 0.002 3.172 1.503–6.695
Maximum diameter of the tumor 0.754 0.994 0.955–1.034
Radiotherapeutic method 48 Gy or not 0.829 0.911 0.391–2.122
Radiotherapeutic method 60 Gy or not 0.087 0.454 0.184–1.121
  1. *The hazard ratio for gender is represented as the hazard of women divided by that of men.