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Kaplan-Meier plot of locoregional progression-free survival by treatment group
Hazard ratio 1·53 (95% CI 0·63 to 3·70). Log-rank test p=0·34. 2-year locoregional progression-free survival estimates for conventional radiotherapy 80% (95% CI 65 to 90) and for IMRT 78% (62 to 87); absolute difference 3% (–15 to 20). IMRT=intensity-modulated radiotherapy.
