Table 2.

Adjusted incidence rate ratios of a first cardiovascular event in risk periods after a respiratory tract infection

Risk Period (d)	No. of Events	IRR (95% CI)*	IRR (95% CI)†
1–91	125	1.56 (1.20–2.02)	1.25 (1.02–1.53)
1–3	82	2.73 (1.41–5.27)	2.39 (1.21–5.62)
4–7	21	2.13 (1.46–2.74)	2.01 (1.22–2.78)
8–14	9	1.93 (1.11–2.08)	1.73 (1.09–2.13)
15–28	8	1.36 (0.87–2.11)	1.16 (0.77–2.19)
29–91	5	1.19 (0.73–1.51)	1.08 (0.69–1.53)
Baseline period	706	1.00	1.00

Definition of abbreviations: CI = confidence interval; IRR = incidence rate ratio.

^*IRR adjusted for age.

^†IRR adjusted for age and season.