Supplemental Material for:Post-90-day survival after stroke according to 90-day functional outcome in the 2013 and 2020 cohorts: a Swedish Stroke Register study

In IS, higher survival in 2020 was observed both among functionally independent patients (mRS 0-2; aHR 0.76, 95% CI 0.68–0.86; 3-year survival 93.4% vs 91.9%) and those with dependency at 90 days (mRS 3-5; aHR 0.84, 95% CI 0.77–0.91; 76.3% vs 71.7%). In contrast, survival was not significantly different after ICH (mRS 0-2: 90.7% vs 91.1%; mRS 3-5: 78.5% vs 77.8%). Across both stroke subtypes, 90-day disability remained strongly associated with long-term mortality.</p><p dir="ltr"><b>Conclusion </b>Post-90-day survival after IS was higher in the 2020 than the 2013 cohort and was observed across the full spectrum of post-stroke disability.

Findings suggest that gains in survival are not limited to patients with favorable recovery but extend across levels of post-stroke disability, potentially reflecting improvements in post-acute stroke care and secondary prevention. In contrast, no corresponding improvement was observed across functional outcome levels after ICH.<b> </b>Further studies are needed to confirm these findings and investigate their underlying mechanisms.</p>