Table 2.
Summary by Disease Category.
| Etiology | No. of Patients | Prevalence Rate (% of Total) | 95% Confidence Interval |
|
|---|---|---|---|---|
| Lower (%) | Upper (%) | |||
| Nonspecific diagnosis | 1822 | 67.8 | 66 | 69.6 |
| Epstein-Barr virus | 238 | 8.86 | 7.81 | 9.96 |
| Malignant | 126 | 4.69 | 3.92 | 5.52 |
| Granulomatous | 109 | 4.06 | 3.34 | 4.83 |
| Cytomegalovirus | 108 | 4.02 | 3.31 | 4.79 |
| Group A/β Hemolytic Streptococcus | 78 | 2.9 | 2.3 | 3.57 |
| Rubella | 46 | 1.71 | 1.26 | 2.23 |
| Toxoplasmosis | 32 | 1.19 | 0.816 | 1.63 |
| Abscess | 28 | 1.04 | 0.694 | 1.46 |
| Systemic lupus erythematosus | 22 | 0.819 | 0.514 | 1.19 |
| Cat scratch disease | 17 | 0.633 | 0.369 | 0.966 |
| Kawasaki disease | 14 | 0.521 | 0.285 | 0.826 |
| Sarcoidosis | 10 | 0.372 | 0.179 | 0.635 |
| Staphylococcal pharyngitis | 8 | 0.298 | 0.129 | 0.536 |
| Streptococcal tonsillitis | 7 | 0.261 | 0.105 | 0.486 |
| Phlegmons | 6 | 0.223 | 0.082 | 0.434 |
| Mycoplasma pneumonia | 3 | 0.112 | 0.023 | 0.269 |
| Parvovirus B19 | 2 | 0.0744 | 0.00902 | 0.207 |
| Familial Mediterranean fever | 2 | 0.0744 | 0.00902 | 0.207 |
| AIDS | 2 | 0.0744 | 0.00902 | 0.207 |
| Dermatomyositis | 2 | 0.0744 | 0.00902 | 0.207 |
| Streptococcal pneumoniae | 1 | 0.0372 | 0.000943 | 0.137 |
| Rosai-Dorfman disease | 1 | 0.0372 | 0.000943 | 0.137 |
| Kilkuchi-Fugimoto disease | 1 | 0.0372 | 0.000943 | 0.137 |
| PFAPA syndrome | 1 | 0.0372 | 0.000943 | 0.137 |
| Lymphomatoid papillomatosis | 1 | 0.0372 | 0.000943 | 0.137 |