Frailty predicts surgical risks better than rheumatoid arthritis
In over 8.8 million hospitalizations, each 10-point rise in frailty score increased mortality 22.8-fold, while rheumatoid arthritis only raised discharge resource needs.
Arthritis Care & Research
In a cross-sectional study of 8,800,359 elective non-cardiac surgical hospitalizations among U.S. adults, researchers evaluated how frailty and rheumatoid arthritis influence postoperative outcomes. Frailty was measured using the Hospital Frailty Risk Score. Across all hospitalizations, frailty was strongly linked to worse outcomes: a 10-point rise in the score was associated with an 8.5-fold increase in composite adverse clinical events, a 3.8-fold rise in discharge health resource needs, and a 22.8-fold increase in all-cause mortality. In contrast, rheumatoid arthritis was not independently associated with adverse clinical events or inpatient mortality. Instead, rheumatoid arthritis was only associated with greater odds of needing discharge health resources, particularly after intermediate-risk orthopedic surgeries.
Why it matters
The findings show that general physiological vulnerability captured by frailty metrics may matter more than a chronic autoimmune diagnosis when determining acute surgical resilience.
Caveats
The study relied on retrospective administrative data from the National Inpatient Sample, which prevents causal conclusions and depends on the accuracy of diagnostic coding.
The paper
University of Pennsylvania · Verier Outcomes Research Rockville MD
Arthritis Care & Research · 29 Sep 2026