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Table 4 Multivariable Cox regression analysis for PFS 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 0.92 0.65–1.29 0.641
Gender 1.10 0.74–1.65 0.617
Age at diagnosis 1.01 0.99–1.03 0.089
Hypopharyngeal localisation 0.88 0.56–1.37 0.582
Smoking history 2.25 1.13–4.47 0.02