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Table 1 Variables assignment and analysis results of Cox’s regression models for NPC

From: Circulating tumor cells: a valuable marker of poor prognosis for advanced nasopharyngeal carcinoma

Analysis typeFactorGrouping and assignmentAvailable casesP-valueHR95.0% CI for HRs
DeathCensoredLowerUpper
UnivariateAgeContinuous variable71299.0021.031.011.05
Gender1 = “male”; 2 = “female”.017.36.16.83
Clinical stage1 = “I”; 2 = “II”; 3 = “III”; 4 = “IV”71295.0013.141.566.35
EBV-DNAContinuous variable64251.0011.001.001.00
CTCsContinuous variable71299.0001.001.001.00
MultivariateAgeContinuous variable64248.0031.031.011.06
Gender1 = “male”; 2 = “female”.118.51.221.19
Clinical stage1 = “I”; 2 = “II”; 3 = “III”; 4 = “IV”.0023.141.546.41
EBV-DNAContinuous variable.0581.001.001.00
CTCsContinuous variable.0011.001.001.00