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Table 4 Cox regression analysis for time to Overlap/Marginal failure (Near misses)

From: A retrospective, deformable registration analysis of the impact of PET-CT planning on patterns of failure in stereotactic body radiation therapy for recurrent head and neck cancer

  Overall Cohort (n = 96) Definitive SBRT Subgroup (n = 89)
  Univariate Multivariate Univariate Multivariate
  p HR (95% CI) p HR (95% CI) p HR (95% CI) p HR (95% CI)
PET-CT Planning 0.042 0.48 (0.23, 0.98) 0.042 0.48 (0.23, 0.98) 0.012 0.40 (0.19, 0.82) 0.009 0.40 (0.19, 0.79)
Tumor volume (5 cc increase) 0.415 0.98 (0.92, 1.03) 0.323 Not entered 0.514 0.98 (0.92, 1.04) 0.605 Not entered
Cetuximab with SBRT 0.304 0.70 (0.35, 1.39) 0.337 Not entered 0.089 0.54 (0.27, 1.10) 0.066 0.51 (0.25, 1.04)
Interval from previous radiation to recurrence (3 months increase)
  0.512 0.99 (0.96, 1.02) 0.604 Not entered 0.596 0.99 (0.96, 1.02) 0.963 Not entered
  1. Abbreviations: SBRT = stereotactic body radiation therapy, HR = hazard ratio for failure, CI = confidence interval.