Risk factors for coronary arterial involvement in Turkish children with Kawasaki disease: a multicenter retrospective study

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BACKGROUND: Coronary arterial lesions (CALs) are the major component of Kawasaki disease (KD), associated with significant morbidity, which affect a substantial proportion of patients despite proper treatment. The aim of this study was to define the risk factors for CALs in Turkish children with KD. METHODS: Medical records of 399 KD patients from five pediatric rheumatology centers in Turkey were reviewed retrospectively. Demographic, clinical (including duration of fever before intravenous immunoglobulin [IVIG] and resistance to IVIG), laboratory and echocardiographic data were noted. RESULTS: The patients with CALs were younger, had a higher male ratio and a longer duration of fever before IVIG. They also had higher lymphocyte and lower hemoglobin values before the initial treatment. Multiple logistic regression analyses defined the following three criteria as independent risk factors for predicting CALs in Turkish children with KD: age ≤12 months, male gender and duration of fever before IVIG ≥9.5 days. High sensitivity rates of elevated risk of CALs up to 94.5% were calculated despite specificity values falling to 16.5%, depending on which of these three parameters are taken into account. CONCLUSIONS: Based on the demographic and clinical features, we established an easily applicable risk-scoring system for predicting CALs in Turkish children with KD. This may be useful for choosing appropriate treatment and follow-up for KD to prevent coronary artery involvement. Further studies will show whether these risk factors can be used in other Caucasian populations as well.