Surgical Procedures at Critical Access Hospitals Within Hospital Networks

Objective: To compare surgical outcomes and expenditures at critical access hospitals that do versus do not participate in a hospital network among Medicare beneficiaries.

Background: Critical access hospitals provide essential care to more than 80 million Americans. These hospitals, often rural, are located more than 35 miles away from another hospital and are required to maintain patient transfer agreements with other facilities capable of providing higher levels of care. Some critical access hospitals have gone further to formally participate in a hospital network.

Methods: This was a cross-sectional retrospective study from 2014 to 2018 comparing 16,128 Medicare beneficiary admissions for appendectomy, cholecystectomy, colectomy, or hernia repair at critical access hospitals that do versus do not participate in a hospital network. Thirty-day mortality and readmissions were risk adjusted using multivariable logistic regression accounting for patient and hospital factors. Price-standardized, risk-adjusted Medicare expenditures were compared for the 30-day total episode payments consisting of index hospitalization, physician services, readmissions, and postacute care payments.

Results: Beneficiaries (average age = 75.7 years, SD = 7.4) who obtained care at critical access hospitals in a hospital network were more likely to carry ≥2 Elixhauser comorbidities (68.7% vs. 62.8%, P < 0.001). Rates of 30-day mortality were higher at critical access hospitals in a hospital network (4.30% vs. 3.81%, OR = 1.11, P < 0.001). Similarly, readmission rates were higher at critical access hospitals that were in a hospital network (15.13% vs. 14.34%, OR = 1.06, P < 0.001). Additionally, total episode payments were found to be $960 higher per patient at critical access hospitals that were in a hospital network ($23,878 vs. $22,918, P < 0.001).

Conclusions: Critical access hospitals within hospital networks provided care to more medically complex patients and were associated with worse clinical outcomes and higher costs among Medicare beneficiaries undergoing common general surgery operations.