Table 5.

Adjusted incidence rate ratios of a first cardiovascular event in risk periods after a respiratory tract infection excluding people with a coexisting diagnosis of COPD

Risk Period (d)	No. of Events	IRR (95% CI)*
1–3	42	2.38 (1.77–4.76)
4–7	17	2.30 (1.46–3.89)
8–14	5	1.61 (1.15–2.24)
15–28	4	1.36 (0.67–2.76)
29–91	2	0.97 (0.55–2.16)
Baseline period	352	1.00

Definition of abbreviations: CI = confidence interval; COPD = chronic obstructive pulmonary disease; IRR = incidence rate ratio.

^*IRR adjusted for age.