{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T11:36:04Z","timestamp":1780572964296,"version":"3.54.1"},"reference-count":53,"publisher":"Springer Science and Business Media LLC","issue":"6","license":[{"start":{"date-parts":[[2025,5,31]],"date-time":"2025-05-31T00:00:00Z","timestamp":1748649600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,5,31]],"date-time":"2025-05-31T00:00:00Z","timestamp":1748649600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Alma Mater Studiorum - Universit\u00e0 di Bologna"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Eur J Pediatr"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Kawasaki disease (KD) can be complicated\u2014particularly during the acute phase\u2014by coronary artery lesions (CALs). The persistence of CALs (pCALs) beyond the subacute phase increases the risk of long-term cardiovascular morbidity and life-threatening events. While several risk scores, primarily based on Asian and American populations, have been proposed to predict CALs or treatment resistance, few studies have focused on identifying risk factors for pCALs. This study aimed to identify risk factors for pCALs in Italian patients and to evaluate the validity of an existing risk score developed in a North American cohort. Data from KD patients across 11 Italian centers were collected in a centralized RedCap database. pCALs were defined as CALs persisting 8\u00a0weeks post-diagnosis. Clinical, demographic, and laboratory features of patients with and without pCALs were compared. Independent risk factors were identified using multiple logistic regression. The predictive performance of Son\u2019s risk score was assessed through ROC analysis. A total of 517 children (87.4% Caucasian) were enrolled; 52 developed pCALs. pCALs were more common in males (12.03%,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.06), patients\u2009&lt;\u20096\u00a0months (61.5%,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.05), those with Asian ethnicity (26.9%,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.026), incomplete clinical presentation (\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.03), and in those with abnormal abdominal ultrasound findings (\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.04). Affected children had higher WBC, elevated CRP (&gt;\u200913\u00a0mg\/dL), and lower hemoglobin. Compared to those with acute CALs, patients with pCALs were younger, more often IVIG non-responders (34.6% vs. 29.6%,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.001), and late-treated. Son\u2019s score showed good predictive ability for pCALs.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Conclusions<\/jats:italic>\n                    : Male sex, younger age, incomplete presentation, Asian ethnicity, and elevated CRP are independent risk factors for pCALs in Italian children with KD. Son\u2019s score may help identify high-risk patients who could benefit from closer follow-up and early adjunctive therapy, even in predominantly Caucasian populations.\n                    <jats:table-wrap>\n                      <jats:table>\n                        <jats:tbody>\n                          <jats:tr>\n                            <jats:td colspan=\"2\">\n                              <jats:bold>What is Known:<\/jats:bold>\n                              \u2022\n                              <jats:italic>Kawasaki disease can cause CALs, which increase cardiovascular risk if they persist<\/jats:italic>\n                              \u2022\n                              <jats:italic>Previous research has focused mainly on predicting CALs or treatment resistance, but little evidence is available on the risk factors for CALs persistence<\/jats:italic>\n                              <jats:bold>What is New:<\/jats:bold>\n                              \u2022\n                              <jats:italic>Our study identifies independent risk factors for pCALs in Italian children: male gender, younger age, incomplete presentation, Asian ethnicity, and high CRP levels<\/jats:italic>\n                              \u2022\n                              <jats:italic>By applying the Son Risk Score to our population, we confirmed its predictive value in a predominantly Caucasian cohort and its reliability in identifying susceptibility to CALs persistence<\/jats:italic>\n                            <\/jats:td>\n                          <\/jats:tr>\n                        <\/jats:tbody>\n                      <\/jats:table>\n                    <\/jats:table-wrap>\n                  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