The performance of marginal structural models for estimating risk differences and relative risks using weighted univariate generalized linear models
Austin PC. Stat Methods Med Res. 2024; Apr 24 [Epub ahead of print].
Background — Functional outcomes are central to decision-making by older adults (OA), but long-term risks after cancer surgery have not been described beyond 1 year for this population. This study aimed to evaluate long-term healthcare support needs by examining homecare use after cancer surgery for OA.
Methods — This population-based study investigated adults 70 years of age or older with a new cancer diagnosis between 2007 and 2017 who underwent resection. The outcomes were receipt and intensity of homecare from postoperative discharge to 5 years after surgery. Time-to-event analysis with competing events was used.
Results — Among 82,037 patients, homecare use was highest (43.7% of eligible patients) in postoperative month 1. The need for homecare subsequently decreased to stabilize between year 1 (13.9%) and year 5 (12.6%). Of the patients not receiving preoperative homecare, 10.9% became long-term users at year 5 after surgery. Advancing age, female sex, frailty, high-intensity surgery, more recent period of surgery, and receipt of preoperative homecare were associated with increased hazards of postoperative homecare. Intensity of homecare went from 10.3 to 10.1 days per patient-month between month 1 and year 1, reaching 12 days per patient-month at year 5. The type of homecare services changed from predominantly nursing care in year 1 (51.9%) to increasing personal support services from year 2 (69.6%) to year 5 (77.5%).
Conclusion — Receipt of homecare increased long-term after cancer surgery for OA, peaking in the first 6 months and plateauing thereafter at a new baseline. One tenth of the patients without preoperative homecare became long-term homecare users postoperatively, indicating changing healthcare needs focused on personal support services from year 2 to year 5.
Chesney TR, Haas B, Coburn NG, Mahar AL, Zuk V, Zhao H, Hsu AT, Hallet J; members of the REcovery after Surgical Therapy for Older adults Research–Cancer (RESTORE-Cancer) group. Ann Surg Oncol. 2021; 28(3):1298-310. Epub 2020 Aug 12.
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