Venous Thromboembolism and Non-Small Cell Lung Cancer: A Pooled Analysis of National Cancer Institute of Canada Clinical Trials Group (NCIC CTG) Trials.
Bibliographic record
Abstract
Abstract Purpose: To determine the incidence of venous thromboembolism (VTE) in patients with early and advanced non-small cell lung cancer (NSCLC); to explore predictive factors for VTE occurrence during trials in these populations, and to investigate the effect of VTE on overall survival in patients with NSCLC. Patients and Methods: Data from three National Cancer Institute of Canada Clinical Trials Group trials were included in the analyses (n=1987). JBR.10 was a randomized study of post-resection adjuvant vinorelbine/cisplatin versus observation in stage IB/II NSCLC. BR.18 was a randomized study of paclitaxel/carboplatin ± the metalloproteinase inhibitor BMS-275291 in advanced NSCLC (1st line). BR.21 was a randomized study of erlotinib versus placebo in previously treated (2nd or 3rd line) NSCLC. The relationship between VTE, cancer treatment, concomitant medications, and baseline patient characteristics was explored with univariate and multivariate analysis. Cox regression analysis was performed to determine whether VTE was independently associated with survival. Each trial was analyzed separately; in addition a pooled analysis was performed with the advanced disease trials (BR.18 and BR.21). Results: The incidence of VTE was 0% in the observation arm of JBR.10 and ranged from 3% in the adjuvant chemotherapy arm of JBR.10 to 8% in BR.18. In JBR.10, VTE was independently associated with the administration of adjuvant chemotherapy (p=0.015), baseline obesity (p=.001), and low platelet count (p=.007). For patients with advanced NSCLC, VTE was significantly more common in patients receiving chemotherapy (BR.18) compared to patients receiving erlotinib or placebo (BR.21) (8% vs 2%, p< 0.0001). In BR.18, but not BR.21, VTE was associated with a prior history of VTE (p=0.001). When BR.18 and BR.21 were pooled, prior VTE remained significant. In BR.18 and BR.21, VTE was associated with shorter survival in multivariate analysis (HR=1.69, 95%CI 1.32–2.17, p<.0001); further analyses, including JBR.10, are planned to explore this finding. Conclusion: VTE is a frequent event in patients with advanced NSCLC and is associated with the administration of chemotherapy. Treatment with metalloproteinase or epidermal growth factor inhibitors does not appear to increase the risk of VTE. In early NSCLC, adjuvant chemotherapy, morbid obesity and a prior history of VTE are associated with increased risk. VTE is associated with shortened survival in patients with advanced NSCLC. Funding for this study was provided by the Canadian Cancer Society.
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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 | 0.024 | 0.036 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.009 | 0.015 |
| Bibliometrics | 0.003 | 0.005 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".