Subgroup analyses investigating the impact of primary payer on the outcomes after aneurysmal subarachnoid hemorrhage in patients who underwent microsurgical clipping.

*The independent variables included as covariates in regression analyses were patient age, sex, race, comorbidities, median household income of the patient’s zip code, hospital region, hospital location, teaching status, procedural volume, the presence of intracerebral hemorrhage, the performance of a ventriculostomy, and year of admission.