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Table 3 Associations between personal cold spells and stroke in Kaunas, Lithuania, 2000–2015, by stroke type. The effect estimates are expressed as Odds Ratios (OR) and their 95% Confidence Intervals (95%CI)

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)