The cause of illness (number and percentage of illnesses per system or specific diagnosis; n=464; missing data in two)
| System | Illness | Pre-existing | Infection | Exercise related | Environment | Other |
|---|---|---|---|---|---|---|
| All systems | All illness (n=464) | 20 (4.3) | 273 (58.8) | 19 (4.1) | 82 (17.7) | 70 (15.1) |
| Respiratory | All respiratory system illness (n=144) | 7 (4.9) | 105 (72.9) | 6 (4.2) | 24 (16.7) | 2 (1.4) |
| Acute upper respiratory tract infection (n=74) | 2 (2.7) | 68 (91.9) | 2 (2.7) | – | 2 (2.7) | |
| Allergic rhinitis (n=21) | 1 (4.8) | 1 (4.8) | – | 19 (90.5) | – | |
| Digestive | All digestive system illness (n=128) | 2 (1.6) | 73 (57.0) | 2 (1.6) | 18 (14.1) | 31 (24.2) |
| Infective gastro-enteritis (n=60) | – | 59 (98.3) | – | – | 1 (1.7) | |
| Non-infective gastro-enteritis (n=31) | – | 2 (6.5) | 2 (6.5) | 13 (41.9) | 14 (45.2) | |
| Skin and subcutaneous | All skin and subcutaneous illness (n=105) | 6 (5.7) | 75 (71.4) | 1 (0.9) | 14 (13.3) | 9 (8.6) |
| Bacterial skin infection (n=44) | – | 44 (100) | – | – | – | |
| Fungal skin infection (n=18) | – | 14 (77.8) | 1 (5.6) | 3 (16.7) | – | |
| Viral skin infection (n=14) | – | 14 (100) | – | – | – | |
| Allergic dermatitis (n=12) | 5 (41.7) | – | – | 6 (50.0) | 1 (8.3) | |
| Nervous | All nervous system illness (n=21) | – | – | 2 (9.5) | 9 (42.9) | 10 (47.6) |
| Headache (n=19) | – | – | 2 (10.5) | 9 (47.4) | 8 (42.1) | |
| Mental or behavioural | All mental or behavioural illness (n=20) | – | 1 (5.0) | 1 (5.0) | 10 (50.0) | 8 (40.0) |
| Sleep disorder (n=18) | – | 1 (5.6) | 1 (5.6) | 10 (55.6) | 6 (33.3) | |
| Ears and mastoid | All ear and mastoid illness (n=16) | 1 (6.3) | 9 (56.3) | – | 3 (18.8) | 3 (18.8) |
| Otitis externa or media (n=5) | – | 3 (60.0) | – | 2 (40.0) | – |