The trial enrolled 804 patients, and on final analysis for primary end point (efficacy boundary survival), the results showed a favorable trend, but no statistically significant benefit for pembrolizumab arm HR 0.83 (05% CI, 0.68–1.03).
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The sentences
On subgroup analysis, patients with tumors that had PD-L1 high expression (CPS ≤ 25%) showed a trend of potential benefit, with an HR of 0.59 (95% CI, 0.28–1.22) [ 35 ].