ABCD2 and Hypertension: However, hypertension history and ABCD2 ≥ 4 were independently related to recurrent ischaemic stroke risk at 90 days (HR 2.098, 95% CI 1.232–3.573, p = 0.006; HR 1.836, 95% CI 1.129–2.985, p = 0.014).