Health-related quality of life of Canadian patients with human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer.
Bibliographic record
Abstract
397 Background: The EuroQol 5 Dimension 5 Level (EQ-5D-5L) is a validated tool that assesses health utility (HU) as a self-reported measure of health-related quality of life (HRQoL). This study aims to generate Canadian-specific HU data for patients with stable, HER2-positive (HER2+) metastatic breast cancer (mBC) receiving standard therapies. Methods: A cross-sectional study was conducted at McGill University Health Centre in Quebec, Canada. Eligibility criteria included: age ≥18 years, de novo or recurrent mBC, stable disease, and active treatment with a Health Canada-approved systemic therapy regimen (any line/time point on treatment). The EQ-5D-5L questionnaire was administered at every visit and each record was treated as a unique singular data point. The HU values were derived using the Canadian algorithm developed by Xie et al., 2016. The EQ-5D-5L measures HRQoL across five domains: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression, and is scored on 5 levels ranging from one “no problems” to five “extreme problems”. A second part of the questionnaire includes a visual analogue scale (VAS) where respondents rank their overall health on scale of 0-100. The primary outcome was mean HU and standard deviation (SD) for HER2+ patients overall. Secondary outcomes included mean HU by hormone receptor (HR) status and describing patient responses to the questionnaire. Results: Between December 2022 and July 2023, a total of 81 HER2+ HU data points were included for analysis, representing 30 patients. For these patients, the mean age was 54.2 years (SD: 10.6). Most patients (58.3%) were on first line and had an Eastern Cooperative Oncology Group Performance Status of 0 (65.5%). The mean HU value was 0.83 (SD: 0.14, n=81). For patients with HR-positive mBC, the mean HU was 0.81 (SD: 0.14, n=44), while for patients with HR-negative mBC, it was 0.85 (SD: 0.13, n=37). The majority of patients reported “no problems” across all domains: mobility (69.1%), self-care (81.5%), usual activities (46.9%), pain/discomfort (35.8%), and anxiety/depression (58%). The mean VAS score was 77.3 (SD: 17.0). Conclusions: This study provides the first Canadian data on contemporary HU values for patients with HER2+ mBC, which reflects current HRQoL amidst a changing treatment landscape.
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.002 | 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 teacher head, 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".