Illness pattern by severity among male professional football players
| 0 days N | 1–3 days N | 4–7 days N | 8–28 days N | >28 days N | |
|---|---|---|---|---|---|
| All illnesses | 9 | 1226 | 456 | 140 | 30 |
| Respiratory tract | 3 | 680 | 308 | 76 | 5 |
| Gastrointestinal | 4 | 404 | 90 | 20 | 0 |
| Neurological* | 1 | 58 | 3 | 3 | 4 |
| Unexplained fatigue | 1 | 43 | 15 | 5 | 1 |
| Psychological | 0 | 2 | 2 | 5 | 2 |
| Cardiovascular | 0 | 2 | 2 | 3 | 7 |
| Dental | 0 | 7 | 5 | 0 | 0 |
| Renal | 0 | 1 | 2 | 3 | 1 |
| Ophthalmological | 0 | 3 | 1 | 3 | 1 |
| Other | 0 | 26 | 28 | 22 | 9 |
*Neurological including headache, migraine and nausea.