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Table 5 Multivariable Cox regression analysis for OS including cumulative cisplatin dose; landmark analysis only including patients alive 8 weeks after end of treatment

From: 3-weekly or weekly cisplatin concurrently with radiotherapy for patients with squamous cell carcinoma of the head and neck – a multicentre, retrospective analysis

Factor Hazard ratio 95% Confidence interval p-value
Cumulative cisplatin dose 1.25 0.84–1.87 0.263
Gender 1.05 0.66–1.67 0.821
Age at diagnosis 1.02 1.00–1.05 0.012
Hypopharyngeal localisation 1.09 0.66–1.80 0.735
Smoking history 1.98 0.91–4.31 0.082