Multivariable models examining the association of surgical clipping with outcomes.

ME: marginal effects; CI: confidence intervals; OR: odds ratio.*County coiling ratio was used as an instrument of coiling.⌘Hospital ID was used as a random effects variable.¶The propensity score was calculated using the following variables: sex, race, insurance, medical comorbidities.§All regressions were based on linear models.Multivariable models examining the association of surgical clipping with outcomes.