Comparing laboratory variables at different time intervals between the two study groups showed that neutrophils at time of ACS diagnosis, lymphocytes at PICU admission, RBC 24 h before discharge, MCV at admission, MCV at ACS diagnosis, MCV 24 h before discharge, mean corpuscular hemoglobin (MCH) at admission, MCH at ACS diagnosis, and positive qualitative CRP at admission had a statistically significant difference between the two groups (Supplementary Material Table S2). This evidence concerns the gene CRP and acute chest syndrome.