Table 2. Annual incidence rates of coronary arterial aneurysm in patients with refractory Kawasaki disease

Year	2009	2010	2011	2012	2013	2014	2015	2016	2017
Incidence rate of CAA (%)	7.6	6.1	5.0	5.5	6.8	5.2	5.3	5.2	4.2

CAA: coronary arterial aneurysm.