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FUO categories and economic status
| Diagnoses | High-income countries (n = 74) | Upper-middle income countries (n = 416) | Low-middle income countries (n = 297) | Low income countries (n = 1) |
|---|---|---|---|---|
| Infections (n = 407) | 36 | 209 | 162 | 0 |
| Neoplasms (n = 90) | 5 | 53 | 32 | 0 |
| CVD (n = 73) | 7 | 49 | 17 | 0 |
| Undiagnosed (n = 158) | 14 | 79 | 64 | 1 |
| Other (n = 60) | 12 | 26 | 22 | 0 |
CVD collagen vascular disorders
