Home-based exercise prehabilitation to improve disease-free survival and return to intended oncologic treatment after cancer surgery in older adults with frailty: a secondary analysis of a randomized trial.
Daniel I McIsaac, Nathaniel Neilipovitz, Gregory L Bryson, Sylvain Gagne, Allen Huang, Manoj Lalu, Luke T Lavallée, Husein Moloo, Barbara Power, Celena Scheede-Bergdahl, Carl van Walraven, Colin J L McCartney, Monica Taljaard, Emily Hladkowicz
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Abstract
Background: Improving survivorship for patients with cancer and frailty is a priority. We aimed to estimate whether exercise prehabilitation improves disease-free survival and return to intended oncologic treatment for older adults with frailty undergoing cancer surgery.
Methods: We conducted a secondary analysis of the oncologic outcomes of a randomized trial of patients ≥ 60 yr of age with frailty undergoing elective cancer surgery. Participants were randomized either to a supported, home-based exercise program plus nutritional guidance or to usual care. Outcomes for this analysis were one-year disease-free survival and return to intended oncologic treatment. We estimated complier average causal effects to account for intervention adherence.
Results: We randomized 204 participants (102 per arm); 182 were included in our modified intention-to-treat population and, of these participants, 171/182 (94%) had complete one-year follow up. In the prehabilitation group, 18/94 (11%) died or experienced cancer recurrence, compared with 19/88 (11%) in the control group (hazard ratio [HR], 1.25; 95% confidence interval [CI], 0.66 to 2.34; P = 0.49). Return to intended oncologic treatment occurred in 24/94 (29%) patients the prehabilitation group vs 20/88 (23%) in the usual care group (HR, 1.53; 95% CI, 0.84 to 2.77; P = 0.16). Complier average causal effects directionally diverged for disease-free survival (HR, 0.91; 95% CI, 0.20 to 4.08; P = 0.90) and increased the point estimate for return to treatment (HR, 2.04; 95% CI, 0.52 to 7.97; P = 0.30), but in both cases the CIs included 1.
Conclusions: Randomization to home-based exercise prehabilitation did not lead to significantly better disease-free survival or earlier return to intended oncologic treatment in older adults with frailty undergoing cancer surgery. Our results could inform future trials powered for more plausible effect sizes, especially for the return to intended oncologic treatment outcome.
Study registration: ClinicalTrials.gov ( NCT02934230 ); first submitted 22 August 2016.
期刊介绍：
The Canadian Journal of Anesthesia (the Journal) is owned by the Canadian Anesthesiologists’
Society and is published by Springer Science + Business Media, LLM (New York). From the
first year of publication in 1954, the international exposure of the Journal has broadened
considerably, with articles now received from over 50 countries. The Journal is published
monthly, and has an impact Factor (mean journal citation frequency) of 2.127 (in 2012). Article
types consist of invited editorials, reports of original investigations (clinical and basic sciences
articles), case reports/case series, review articles, systematic reviews, accredited continuing
professional development (CPD) modules, and Letters to the Editor. The editorial content,
according to the mission statement, spans the fields of anesthesia, acute and chronic pain,
perioperative medicine and critical care. In addition, the Journal publishes practice guidelines
and standards articles relevant to clinicians. Articles are published either in English or in French,
according to the language of submission.
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