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Table 3 Cox regression model of multivariable analysis for OS

From: Salvage surgery for neck residue or recurrence of nasopharyngeal carcinoma after primary radiotherapy: options of surgical methods and regions

Factor β SE Wald P Exp (β)
Age 0.809 0.232 12.193 0.000 2.245
rN stage 0.449 0.186 5.852 0.016 1.567
Size of LN 0.431 0.203 4.527 0.033 1.539