{
  "abstract": "Introduction In the 20th century, the estimated mortality rate of aneurysmal subarachnoid hemorrhage was over 30%, with a marked decline after 2000.Aim of study We aimed to analyze changes in surgical treatment methods and clinical outcomes for patients with SAH during the post-ISAT period, using a Korean nationwide medical claim database.Method Patients with subarachnoid hemorrhage who received surgical treatment for cerebral aneurysm from 2005 to 2020 were included. The specific surgery type was classified using the surgical code and according to whether stents were used. Yearly trends in mortality rates and poor prognosis, using tracheostomy as proxy, were analyzed by a simple regression analysis. A multistep logistic regression analysis was performed to evaluate the risk factors of mortality and poor prognosis.Results Overall, 83,587 patients were included. Females were predominant (64.5%). Microsurgical clip usage rate decreased by approximately two-thirds from 78.8% in 2005 to 24.4% in 2020. Contrarily, endovascular treatment proportion gradually increased, and stent-assisted coil embolization rate surpassed microsurgical clip usage rate in 2020 (24.6% vs. 24.4%). In the multivariate analysis, endovascular treatment correlated positively with 3-month mortality (hazard ratio [HR]: 1.13, 95% confidence interval [CI]: 1.07–1.19, P < 0.0001), although correlated negatively with poor prognosis (tracheostomy) (HR: 0.93, 95% CI: 0.89–0.98, P = 0.0050).Abstract A146 Figure 1Conclusion For patients with subarachnoid hemorrhage due to ruptured cerebral aneurysm, the endovascular treatment rate increased rapidly and stent-assisted coil embolization rate surpassed that of microsurgical clip ligation. Diversification of treatment methods has led to a decrease in mortality and improved prognosis.Conflict of Interest No",
  "authors": [
    {
      "affiliations": [
        "Uijeongbu Eulji Medical Center, Uijeongbu, South Korea"
      ],
      "name": "Yung Ki Park"
    },
    {
      "affiliations": [
        "Uijeongbu Eulji Medical Center, Uijeongbu, South Korea"
      ],
      "name": "Byul-Hee Yoon"
    },
    {
      "affiliations": [
        "Uijeongbu Eulji Medical Center, Uijeongbu, South Korea"
      ],
      "name": "Eui-Hyun Hwang"
    },
    {
      "affiliations": [
        "Nowon Eulji Medical Center, Seoul, South Korea"
      ],
      "name": "Jae Hoon Kim"
    },
    {
      "affiliations": [
        "Nowon Eulji Medical Center, Seoul, South Korea"
      ],
      "name": "Hee In Kang"
    },
    {
      "affiliations": [
        "Hanyang University Guri Hospital, Guri, South Korea"
      ],
      "name": "Yu Deok Won"
    },
    {
      "affiliations": [
        "Hanyang University Guri Hospital, Guri, South Korea"
      ],
      "name": "Jin Whan Cheong"
    }
  ],
  "title": "A146 National trends in surgical treatment and clinical outcomes among patients with aneurysmal subarachnoid hemorrhage in the Republic of Korea",
  "uid": "8022ccb5-210b-5e8d-a355-2ff7b18b0a9c"
}