Table 2.
Etiologies of FUO, EFUO and IUO groups.
| FUO n = 35 |
IUO n = 35 |
EFUO n = 33 |
Total n = 103 |
p Value | |
|---|---|---|---|---|---|
| Variables | n (%) | ||||
| Non-diagnosis | 11 (31.4) | 15 (42.9) | 19 (57.6) | 45 (43.7) | |
| Diagnosis | 24 (68.6) | 20 (57.1) | 14 (42.4) | 58 (56.3) | |
| n (% of diagnoses) | |||||
| NIID | 15 (62.5) | 16 (80.0) | 4 (28.6) | 35 (60.3) | 0.0101 |
| Systemic vasculitis | 7 (29.2) | 8 (40.0) | 0 (0.0) | 15 (25.9) | 0.0263 |
| Rheumatic disease | 1 (4.2) | 8 (40.0) | 1 (7.1) | 10 (17.2) | 0.0008 |
| Still’s disease | 5 (20.8) | 0 (0.0) | 3 (21.4) | 8 (13.8) | 0.0779 |
| Autoimmune diseases | 2 (8.3) | 0 (0.0) | 0 (0.0) | 2 (3.4) | 0.1379 |
| Infections | 3 (12.5) | 1 (5.0) | 4 (28.6) | 8 (13.8) | 0.3530 |
| Miscellaneous diseases | 1 (4.2) | 1 (5.0) | 6 (42.8) | 8 (13.8) | 0.0014 |
| Malignancy | 5 (20.8) | 2 (10.0) | 0 (0.0) | 7 (12.1) | 0.0617 |
Miscellaneous diseases included: recurrent pericarditis, Erdheim-Chester disease, diverticular fistula, Muckle-Wells syndrome, Encephalitis causing IUO, morbid obesity, mesenteric panniculitis, Familial Mediterranean Fever.