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.