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breast cancer (BC), HER2 inhibitor versus trastuzumab 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) 0.72 [0.62, 0.83]< 12%3 studies (3/-)100.0 %lownot evaluable highcrucial-
deaths (OS) (extension) 0.69 [0.58, 0.82]< 10%1 study (1/-)100.0 %NAnot evaluable important-
PFS (extension) 0.69 [0.59, 0.81]< 10%1 study (1/-)100.0 %NAnot evaluable important-
progression or deaths (PFS) 0.67 [0.51, 0.88]< 179%3 studies (3/-)99.8 %lownot evaluable highimportant-
objective responses (ORR) 10.80 [5.29, 22.05]> 10%1 study (1/-)100.0 %NAnot evaluable non important-

safety endpoints 00

AE leading to treatment discontinuation (any grade) 1.92 [0.77, 4.80]< 10%1 study (1/-)8.1 %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.