Table 3.

Cumulative odds ratios (ors) and 95% confidence intervals (cis) for ILI with risk of ischemic stroke.a

Hospitalization for ILI	Unadjusted		Adjusted for seasonal prevalence of ILI
	OR	95% CI	OR	95% CI
Within 15 days before stroke	2.90	1.97–4.28	2.88	1.86–4.47
Within 30 days before stroke	2.59	1.93–3.46	2.59	1.86–3.61
Within 60 days before stroke	2.16	1.73–2.69	2.18	1.69–2.82
Within 90 days before stroke	1.79	1.48–2.16	1.78	1.43–2.21
Within 180 days before stroke	1.56	1.35–1.81	1.51	1.27–1.78
Within 365 days before stroke	1.66	1.48–1.86	1.50	1.31–1.71

OR indicates odds ratio; CI, confidence interval.

^aAll P < 0.0001.