From: Risk of ischemic and hemorrhagic stroke in relation to cold spells in four seasons
Exposure | All cases, OR (95% CI) | Ischemic cases, OR (95% CI) | Hemorrhagic cases, OR (95% CI) |
---|---|---|---|
≥ 1 day | 1.08 (1.00–1.16) | 1.11 (1.02–1.21) | 0.96 (0.81–1.14) |
≥ 2 days | 1.09 (0.99–1.21) | 1.13 (1.01–1.27) | 0.95 (0.75–1.20) |
≥ 3 days | 1.16 (0.99–1.37) | 1.22 (1.02–1.46) | 0.93 (0.63–1.38) |
≥ 4 days | 1.28 (0.98–1.67) | 1.36 (1.01–1.83) | 1.00 (0.55–1.83) |
Per day | 1.03 (1.00–1.07) | 1.05 (1.01–1.09) | 0.98 (0.91–1.06) |