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Holistic assessment of quality of life predicts survival in older patients with bladder cancer

Published:January 17, 2023DOI:https://doi.org/10.1016/j.urology.2022.12.036

      Abstract

      Objectives

      To determine if clustering methods can use a holistic assessment of health-related quality-of-life after BC diagnosis to predict survival outcomes independent of clinical characteristics. In the United States, an estimated 81,180 cases of bladder cancer (BC) will be diagnosed in 2022. We aim to help address the knowledge gap concerning the impact of patient functional status on outcomes.

      Materials and Methods

      This is a cross-sectional, retrospective cohort study of patients in the SEER-MHOS registry. Age and SF-36 responses were used as K-means inputs to identify homogenous clusters of older patients with bladder cancer. We analyzed the association between the identified clusters, patient and disease characteristics, and outcomes. We used Cox proportional hazard regression to compare overall survival.

      Results

      We identified five homogenous clusters that exhibited differences in patient characteristics and survival. There was no significant difference in cancer stage or surgery type among the clusters. The Cox proportional hazard regression demonstrated significant associations of cluster with gender, age, education, marital status, smoking status, type of surgery, and cancer stage on overall survival. Cluster independently predicted overall survival.

      Conclusions

      Using unsupervised machine learning, we identified clusters of patients with bladder cancer who had similar mental and physical function scores. Cluster grouping suggests that patients’ mental and physical function may not be based on disease or treatment. There are significant survival differences between all clusters, demonstrating that a holistic assessment of patient-reported health-related quality-of-life has the potential to predict survival and possible modifiable risk factors in older patients with bladder cancer.

      Key words

      Abbreviations:

      ADL (activities of daily living), BC (bladder cancer), HR-QoL (health-related quality-of-life), SEER-MHOS (surveillance, epidemiology, and end results-Medicare health outcomes survey), PH (proportional Hazard), MIBC (muscle invasive bladder cancer), NMIBC (non-muscle invasive bladder cancer)
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