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Patient distribution in the data set.
| Patient demographics (N=2299) | |||
| Categories of cause of fever of unknown origin | Mean age (years) | Male, n (%) | Female, n (%) |
| Infections | 47.79 | 1226 (53.33) | 1073 (46.67) |
| Immune diseases | 42.90 | 803 (34.93) | 1496 (65.07) |
| Tumors | 50.91 | 1201 (52.24) | 1098 (47.76) |
| Others | 38.81 | 1268 (55.15) | 1031 (44.85) |
