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mHNSCC - L2 - PDL1 positive, pembrolizumab based treatment , meta-analysis of study results

Outcome Relative effect 95%CI LoD Trt. better when I2 k (RCT/OBS) Bayesian probability Overall ROB Publication bias Degree of certainty Endpoint importance Published MA

efficacy endpoints 00

deaths (OS) 0.74 [0.58, 0.94]< 10%1 study (1/-)99.4 %NAnot evaluable crucial-
progression or deaths (PFS) 1.01 [0.81, 1.26]< 10%1 study (1/-)46.5 %NAnot evaluable important-
objective responses (ORR) 1.90 [1.04, 3.47]> 10%1 study (1/-)98.2 %NAnot evaluable non important-

LoD: level of statistical demonstration: Statistically conclusive: statistically significant with a strict control of overall risk of type 1 error (statistically demonstrated), does not take into account the risk of bias; suggested: nominally statistically significant but without a strict control of overall risk of type 1 error; inconclusive: not nominally statistically significant; safety concerns;
Bayesian probability: Bayesian posterior probability of treatment effect (computed with a noninformative prior); ROB: risk of bias; k: number of studies; published MA: number of published meta-analysis on the same topic; degree of certainty adapted from GRADE. Trt. better when: indicates when the relative treatment effect shows that the studied treatment is better than control.