Using the Risk Assessment Index (RAI) to predict 90-day mortality and hospital utilization in cancer patients at UPMC Hillman Cancer Center.
243 Background: Patients with cancer vary considerably in health status and functional reserve. Identifying the most frail patients whom are at risk of treatment toxicity or death can be difficult. The Risk Assessment Index (RAI) is a validated tool used to assess frailty in patients prior to surgery. Thus, we aimed to investigate frailty assessment utilizing the RAI in cancer patients and its ability to predict hospital utilization and 90-day mortality. Methods: From 9/15/2017 to 1/31/2018, new patients with solid tumor malignancies at the UPMC Hillman Cancer Center completed the RAI. Age, cancer type and stage, and treatments were abstracted. ED visits, hospitalizations and mortality data were provided by the Wolff Center at UPMC. Mann-Whitney U and likelihood-ratio tests were performed comparing RAI, ED usage/hospitalizations, and mortality. Elective hospital admissions were excluded. Results: 273 patients completed the RAI. 58.6% of pts were male and average age was 62.7 (21-88), and the average RAI score was 39.9 (IQR 35-44). The most common cancer types were melanoma (22.7%), prostate (14.3%), and lung (11.4%). 43.6% of patients had stage IV cancer. Within 90 days after RAI, 51 patients (18.7%) experienced at least one unplanned ED visit or hospitalization, and 10 patients (3.7%) were deceased. Patients with an ED visit/hospitalization had an average RAI of 42 (IQR 37-46) compared to 39.4 (IQR 35-43) for patients without one: a 2.6-point difference (p = 0.008). 90-day mortalities had an average RAI score of 47.5 (IQR 42-53) compared to 39.6 (IQR 35-44) for non-mortalities: a 7.9-point difference (p = 0.003). Six of 242 (2.5%) patients without a hospitalization experienced mortality whereas 4 of 31 (12.9%) patients with a hospitalization experienced mortality (p = 0.017). Conclusions: This study shows that the RAI may be utilized to predict 90-day mortality in cancer patients. Patients at greatest risk of 90-day mortality were more likely to have unplanned hospitalizations. While there was a statistically significant difference in RAI scores between patients with and without unplanned ED visits/hospitalizations, this difference was too small to be clinically meaningful.