Economic evaluations of oral medications for breast cancer treatment in the U.S.: a systematic review with a focus on cost-effectiveness threshold

Sponsorship bias in oncology cost effectiveness analysis

OBJECTIVES

Cost effectiveness analysis (CEA) has been increasingly used to inform cancer treatment coverage policy making worldwide. The primary objective of this study was to assess the association between industry sponsorship and CEA results in oncology.

STUDY DESIGN AND SETTING

All CEAs in oncology used incremental cost per quality-adjusted life year (QALY) as health effect identified from the Tufts CEA Registry since 1976 was analyzed. Descriptive analyses were performed to present and compare the characteristics of CEA funded by industry and non-industry. Robust logistic regression was performed to assess the relationship between the industry sponsorship and cost effective conclusion over a wide range of threshold values.

RESULTS

A total of 1537 CEAs in oncology published from 1976 to 2021 were included. There were 387 (25.2%) with the industry sponsorship. CEAs sponsored by the industry were more likely to report ICERs below $50,000/QALY (adjusted odds ratio (OR), 1.91, 95% confidence interval (CI), 1.45-2.51, P < 0.001), $100,000/QALY (2.74, 1.98-3.79, P < 0.001), and $150,000/QALY (3.53, 2.37-5.27, P < 0.001) than studies without industry sponsorship.

CONCLUSIONS

Our study suggests that there has been a significant sponsorship bias in CEAs in oncology. This bias could have a profound implication on drug pricing and coverage policy making.

Research on the Economics of Cancer-Related Health Care: An Overview of the Review Literature

We reviewed current literature reviews regarding economics of cancer-related health care to identify focus areas and gaps. We searched PubMed for systematic and other reviews with the Medical Subject Headings "neoplasms" and "economics" published between January 1, 2010, and April 1, 2020, identifying 164 reviews. Review characteristics were abstracted and described. The majority (70.7%) of reviews focused on cost-effectiveness or cost-utility analyses. Few reviews addressed other types of cancer health economic studies. More than two-thirds of the reviews examined cancer treatments, followed by screening (15.9%) and survivorship or end-of-life (13.4%). The plurality of reviews (28.7%) cut across cancer site, followed by breast (20.7%), colorectal (11.6%), and gynecologic (8.5%) cancers. Specific topics addressed cancer screening modalities, novel therapies, pain management, or exercise interventions during survivorship. The results indicate that reviews do not regularly cover other phases of care or topics including financial hardship, policy, and measurement and methods.