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Table 6 Univariate and multivariate competing risk regression analysis for relapse and mortality-free relapse

From: A different entity: a population based study of characteristics and recurrence patterns in oropharyngeal squamous cell carcinomas

Variable Category Univariate competing risk regression (95 % CI) p-value* Multivariate competing risk regression (95 % CI) p-value*
Relapse
Primary site Non-oropharyngeal vs Oropharyngeal 2.119 (1.282–3.501) 0.0034 1.899 (0.998–3.611) 0.0505
COPD Yes vs. No    1.298 (0.777–2.170) 0.3194
Prior Cancer Yes vs. No    1.083 (0.644–1.819) 0.7645
Primary Treatment Surgery vs. Chemotherapy/ Radiation    1.306 (0.734–2.323) 0.3645
Stage Stage 4 vs Other    1.506 (0.930–2.438) 0.0.0960
Age Age ≥ 55 vs <55    0.960 (0.587–1.571) 0.8714
Mortality-free Relapse
Primary site Non-oropharyngeal vs Oropharyngeal 0.636 (0.314–1.288) 0.053 0.896 (0.366–2.194) 0.8098
COPD Yes vs. No    1.669 (0.734–3.794) 0.2218
Prior Cancer Yes vs. No    2.507 (1.118–5.624) 0.0258
Primary Treatment Surgery vs. Chemotherapy/ Radiation    0.319 (0.115–.884) 0.0280
Stage Stage 4 vs Other    2.242 (1.084–4.638) 0.0295
Age Age ≥ 55 vs <55    2.975 (0.925-9.568) 0.0673
  1. *α = 0.05, significant results in bold using competing risk regression