The first interim analysis, at a median follow-up of 17.9 months, showed a statistically significant improvement in PFS (24-month PFS was 67.8% with pembrolizumab + CCRT versus 57.3% with placebo + CCRT) and a favorable trend in OS (HR = 0.73) for the combination pembrolizumab and CCRT compared with placebo and CCRT, with a manageable safety profile.
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