Ethnic Differences in Outcomes of Endovascular Thrombectomy in New Zealand.

Authors

Jaron Huang, Alicia Tyson, Muthu Muthappan, Annemarei Ranta

Published in

Journal of medical imaging and radiation oncology. Sep 15, 2026. Epub Sep 15, 2026.

Abstract

Stroke is a leading cause of morbidity and mortality in New Zealand, with ethnic disparities known to exist. Endovascular thrombectomy (EVT) has proven efficacy in reducing or preventing disability for stroke patients, but little is known about ethnic differences in functional outcomes following EVT in New Zealand.
A retrospective nationwide registry-based study was conducted, including all patients who underwent EVT between 1st January 2011 through to 31st December 2023 in New Zealand. Demographic, clinical and procedural data were obtained from the National Stroke Register. Primary outcomes were mortality at 7 days and dichotomised modified Rankin Scale (mRS) at 90 days. Subgroup analysis compared patients presenting directly to EVT-capable centres with those requiring transfer.
2852 EVT patients were included (68.7% European, 14.6% Māori, 7.4% Pacific, 8.4% Asian and 1.0% Other). Non-Europeans presented at younger ages and with greater vascular risk factors. Functional outcomes and 7-day mortality rates did not differ significantly by ethnicity. Odds of symptomatic intracranial haemorrhage (sICH) were greater in Māori (aOR 3.01, 1.42-6.38, p = 0.004), Pacific peoples (3.40, 1.22-9.53, p = 0.02) and Asian (aOR 3.57, 1.57-8.15, p = 0.002) patients compared to Europeans. Nearly half of patients (46.5%) initially presented to non-EVT capable centres; although EVT was delayed, functional and mortality outcomes remained similar.
This nationwide study found no significant ethnic disparities in functional outcomes or 7-day mortality following EVT, though sICH was more likely in non-Europeans. Despite treatment delays, patients initially presenting to non-EVT capable centres achieved comparable functional outcomes to those presenting directly to EVT centres.

PMID:
42742289
Bibliographic data and abstract were imported from PubMed on 15 Sep 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.