Table. Characteristics of Kawasaki Disease Cases in Rady Children’s Hospital San Diego Data Seta.
| Characteristic | January 1, 2002, to February 28, 2020 (n = 1396) | March 1, 2020, to November 15, 2021 (n = 65) |
|---|---|---|
| Sex, No. (%) | ||
| Male | 865 (62) | 35 (54) |
| Female | 531 (38) | 30 (46) |
| Age, median (IQR), y | 2.8 (1.4 to 4.9) | 2.5 (1.0 to 5.3) |
| Race and ethnicity, No. (%) | ||
| Asian | 214 (15) | 6 (9) |
| Black | 54 (4) | 1 (2) |
| Hispanic | 482 (35) | 30 (46) |
| White | 324 (23) | 14 (22) |
| Multiracial | 282 (20) | 13 (20) |
| Otherb | 40 (3) | 1 (2) |
| CA worst z score, median (IQR)c | 1.7 (1.1 to 2.5) | 1.5 (1.1 to 2.0) |
| Laboratory data, median (IQR)d | ||
| Illness day of lab data collection | 6 (4 to 7) | 5 (3 to 7) |
| WBC, /μL | 13 200 (10 400 to 17 100) | 14 000 (10 300 to 16 200) |
| ANC, /μL | 8580 (6240 to 11660) | 9048 (5800 to 11712) |
| Hemoglobin z scoree | −1.3 (−2.2 to −0.4) | −1.3 (−2.8 to −0.5) |
| Platelets, ×103/μL | 361 (282 to 456) | 376 (258 to 506) |
| ESR, mm/h | 60 (39 to 76) | 57 (33 to 67) |
| CRP, mg/dL | 6.7 (4.0 to 15.6) | 6.0 (4.1 to 16.0) |
Abbreviations: ANC, absolute neutrophil count; CA, coronary artery; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; WBC, white blood cells.
SI conversion factors: To convert ANC and WBC to ×109 cells per liter, multiply by 0.001; CRP to milligrams per liter, multiply by 10; and platelets to ×109 cells per liter, multiply by 1.0.
P values were calculated by t test for continuous variables and χ2 or Fisher exact t test for categorical variables; for sex and race and ethnicity, these tests were conducted on percentages rather than absolute numbers. No significant differences between data sets were found.
Other included Middle Eastern, North African, and South Asian children.
The highest z score (internal diameter of the right and left anterior descending coronary arteries normalized for body surface area) during the first 6 weeks after fever onset. eTable 2 in Supplement 1 includes information on missing data.
Laboratory data were measured before treatment. Illness day 1 was defined as the first calendar day of fever.
The hemoglobin z score is the number of SD units from the mean for age-adjusted hemoglobin values.