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Table 5 Multivariate analysis of the time of survival in relation to the Cytokeratins expression and other prognostic factors

From: Cytokeratin 8/18 expression indicates a poor prognosis in squamous cell carcinomas of the oral cavity

Prognosticator P valuea RRb Confidance intervalc
Tumor size *0.036 1.239 1.0–1.5
Nodal status *0.000 1.866 1.4–2.4
CK5/6 0.350 1.167 0.8–1.6
CK1 0.931 0.985 0.7–1.4
CK10 0.852 0.968 0.7–1.4
CK19 0.227 1.163 0.9–1.5
CK14 0.470 0.872 0.6–1.3
CK8/18 *0.024 1.487 1.1–2.1
  1. a The partially nonparametric regression model of Cox (1972) was used to evaluate the predictive power of vatious combinations of prognosticators in a multivariate manner.
  2. b RR, relative risk
  3. c 95% confidence interval