Third-line therapy in metastatic renal cell carcinoma: Results from the International mRCC Database Consortium.
Bibliographic record
Abstract
430 Background: Third-line targeted therapy efficacy in metastatic renal cell carcinoma (mRCC) is not well characterized and many funding bodies do not provide reimbursement for it. Methods: The International mRCC Database Consortium (IMDC) consists of consecutive patient series from 25 cancer centers. It was queried for specific sequences of targeted therapy and third-line therapy. Kaplan Meier estimates were used for survival. Cox proportional hazards models were used to adjust hazard ratios for confounders. Patients that stopped second-line therapy were divided into two groups: those that went onto third-line therapy and those did not. Results: 4,050 patients were treated with first-line targeted therapy, of which 2,011 (49.6%) had second-line therapy and 879 (21.7%) had third-line targeted therapy. The most common third-line therapies were everolimus 25%, sorafenib 14%, sunitinib 13%, temsirolimus 11%, pazopanib 10%, and axitinib 6%. IMDC prognostic groups at third-line therapy initiation were 6% favorable risk, 67% intermediate risk, and 27% poor risk. Overall response rate for third-line therapy was 10.5% and 50.9% had stable disease in those patients that were evaluable. Median PFS was 5.1 months (95% CI, 4.5-5.7) and median OS from third-line therapy initiation was 12.0 months (95% CI, 10.7-12.9). Patients stopping second-line therapy that move on to third-line therapy vs. those that do not receive third line therapy have a median OS from stopping second-line therapy of 13.1 vs. 2.3 mons (p<0.0001). When adjusted for second-line IMDC prognostic criteria and KPS at second-line treatment cessation, patients who do receive third-line therapy have a HR of death of 0.41 (95% CI, 0.32-0.52; p<0.0001) compared to those that do not receive third-line therapy. This may be in part due to patient selection. To further limit bias, when excluding patients that live less than 3 months after second-line therapy cessation, the adjusted HR was similar. Conclusions: Third-line targeted therapy has demonstrated activity and is prevalent in use. Further studies are required to determine appropriate sequencing.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.016 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.004 | 0.010 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".