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. Author manuscript; available in PMC: 2017 Jun 17.
Published in final edited form as: JAMA Otolaryngol Head Neck Surg. 2017 Jun 1;143(6):555–560. doi: 10.1001/jamaoto.2016.4238

Table 2.

Multivariate Cox Proportional Hazards Regression Analysis for LRFS

Variable Adjusted HR (95% CI)
Margin, mm
 >5.0 1 [Reference]
 0.01–2.2 2.25 (1.03–4.92)a
 2.3–5.0 1.17 (0.51–2.66)a
 Positive 5.71 (2.08–15.65)a
PORT 2.42 (1.22–4.79)
Tumor size, cm
 ≤2.0 1 [Reference]
 2.1–4.0 0.96 (0.44–2.09)
 >4.0 2.99 (1.30–6.90)

Abbreviations: HR, hazard ratio; LRFS, local recurrence-free survival; PORT, postoperative radiotherapy.

a

Adjusted for tumor size and adjuvant therapy.