Abstract
Purpose
To investigate if comorbidity predicts mortality and functional impairment in middle-aged individuals with cancer (50–64 years) as compared to older individuals.
Methods
A prospective cohort study. Outcomes were mortality and functional impairment at 5 years follow-up. Comorbidity was assessed using adjusted Charlson comorbidity index and polypharmacy (≥ 5 drugs) as surrogate for comorbidity. Multivariate Cox-proportional hazards and binary logit models were used to assess the risk of 5-year mortality and functional impairment respectively.
Results
We included 477 middle-aged (50–64 years) and 563 older (65 + years) individuals with cancer. The prevalence of comorbidity (at least one disease in addition to cancer) was 29% for middle-aged and 45% for older individuals, with polypharmacy observed in 15% and 31% respectively. Presence of ≥ 3 comorbidities was associated with nearly three times as high a risk of mortality in middle-aged individuals (HR 2.97, 95% CI: 1.43–6.16). In older individuals, the HR was 1.7 (95% CI 1.1–2.8). Polypharmacy was associated with a higher risk of mortality in middle-aged (HR 2.35, 95% CI 1.32–4.16) but not in older individuals (HR 1.2, 95% CI 0.9–1.8). Polypharmacy was associated with the four time the risk of functional impairment in middle-aged (OR 4.0, 95% CI 1.59–10.06) and older individuals (OR 4.4, 95% CI 1.6–11.7).
Conclusion
This study of middle-aged and older adults with cancer shows that comorbid disease is common in younger and older individuals with cancer and are associated with inferior outcomes. Assessment and management of comorbidity should be a priority for cancer care across all age groups.
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Data availability
Data are available on reasonable request.
Code availability
Code is available upon request.
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Funding
This study is funded by the European Union/Interreg IV Grensregio Vlaanderen-Nederland (IVA-VLANED-3.46) and Kom op tegen Kanker (Stand up to Cancer–the Flemish cancer league) (10482)).
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The Ethical Review Board of KU Leuven and UZ Leuven (S52097–ML6279) and the Maastricht University Medical Centre (NL31414.068.10) approved the study protocol.
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Laura Deckx is currently employed by Kom op tegen Kanker who partially funded this study. However, at the time of the data collection, Laura was not employed at Kom op tegen Kanker and was not the investigator on the original grant.
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Koczwara, B., Deckx, L., Ullah, S. et al. Impact of comorbidities on physical function and survival of middle-aged, as compared to older, individuals with cancer. Support Care Cancer 30, 1625–1632 (2022). https://doi.org/10.1007/s00520-021-06567-1
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DOI: https://doi.org/10.1007/s00520-021-06567-1