COMPARATIVE STUDY
JOURNAL ARTICLE

Risk factors for Kawasaki disease-associated coronary abnormalities differ depending on age

DooIl Song, Yunku Yeo, KeeSoo Ha, GiYoung Jang, JungHwa Lee, KwangChul Lee, ChangSung Son, JooWon Lee
European Journal of Pediatrics 2009, 168 (11): 1315-21
19159953

INTRODUCTION: The clinical manifestations and risk factors for developing coronary artery abnormalities (CAA) in Kawasaki disease (KD) might differ depending on age.

MATERIALS AND METHODS: From January 2001 to July 2007, 161 patients with an age younger than 1 year (younger group) and 60 patients with an age older than 5 years (older group) were diagnosed with KD at the Korea University Medical Center. Their medical records were reviewed retrospectively and the two groups were compared in terms of a number of variables commonly associated with the development of CAA, including clinical manifestations and laboratory findings.

RESULTS: While the overall incidence of KD-associated CAA in our hospital was 6.7%, CAA developed in 20 (12.4%) of the younger group and ten (16.7%) of the older group, respectively. The CAA (+) cases of the younger group had a longer duration of total fever (9.1 +/- 3.3 vs 6.3 +/- 1.9 days, p = 0.002) and showed fewer diagnostic symptoms (3.0 +/- 1.2 vs 4.3 +/- 1.1, p < 0.001) than the CAA (-) cases. The CAA (+) cases of the older group had a longer duration of total fever (14.1 +/- 10.4 vs 6.5 +/- 1.9 days, p = 0.045), especially with respect to post-intravenous gamma globulin (IVGG) fever (7.9 +/- 9.6 vs 1.1 +/- 0.8 days, p = 0.052), and had higher total white blood cell counts, erythrocyte sedimentation rates, C-reactive protein levels, total bilirubin levels, and Harada scores and lower serum albumin and sodium levels than the CAA (-) cases. Multivariable logistic regression analysis revealed that the factors that were associated significantly with the development of CAA were the number of total symptoms (OR = 0.494, 95% confidence interval (CI) = 0.281-0.871, p = 0.015) in the younger group and the duration of post-IVGG fever (OR = 1.958, 95% CI = 1.098-3.492, p = 0.023) and the Harada score (OR = 3.455, 95% CI = 1.012-11.796, p = 0.048) in the older group.

CONCLUSION: Incomplete clinical manifestations in the younger group and IVGG nonresponsiveness in the older group are associated with the development of KD-associated CAA. These age-specific characteristics could aid the customization of the diagnostic and therapeutic strategies of KD, thereby helping to improve the outcome of this disease.

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