Exploratory subgroup analyses of EV-302: a phase III global study to evaluate enfortumab vedotin in combination with pembrolizumab versus chemotherapy in previously untreated locally advanced or metastatic urothelial carcinoma
Why this work is in the frame
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Bibliographic record
Abstract
BACKGROUND: In the phase III EV-302 study (NCT04223856), enfortumab vedotin (EV) plus pembrolizumab (P) demonstrated superior efficacy and safety versus platinum-based chemotherapy in patients with previously untreated locally advanced/metastatic urothelial cancer (la/mUC). We report the efficacy of EV+P in prespecified subgroups, including those defined by cisplatin eligibility status, the presence or absence of liver metastases, and metastatic disease sites. METHODS: Patients with previously untreated la/mUC were randomly assigned 1 : 1 to receive either EV 1.25 mg/kg and pembrolizumab 200 mg, or gemcitabine plus cisplatin or carboplatin, all intravenously. The two primary endpoints were progression-free survival (PFS) and overall survival (OS). Confirmed objective response rate was one of the secondary endpoints. RESULTS: Overall, 886 patients were randomized: 442 to EV+P and 444 to chemotherapy. Baseline characteristics were balanced across treatment groups. Efficacy and safety data for the intention-to-treat (ITT) population, along with PFS and OS data for cisplatin-eligible and -ineligible patients, were previously published (Powles et al. N Eng J Med, 2024). In this analysis, EV+P showed benefit across prespecified subgroups that was consistent with the ITT population. OS benefit in the EV+P arm versus chemotherapy was seen across all subgroups, including patients with liver metastases (OS 19.1 versus 10.1 months), patients without liver metastases [OS not estimable (NE) versus 17.9 months], patients with visceral metastases (OS 25.6 versus 13.6 months), and in patients with lymph node-only disease (OS NE versus 27.5 months). In addition, confirmed objective response rate and PFS benefit with EV+P versus chemotherapy was seen across all examined subgroups. CONCLUSION: Along with previously published safety data, EV+P demonstrated benefit compared with chemotherapy across all prespecified subgroups, consistent with the ITT population and supporting EV+P as the standard of care for first-line treatment of la/mUC.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it