| clear up on own | 0.60 |
| become chronic | 0.54 |
| occur in child | 0.49 |
| occur in middle ear | 0.16 |
| anatomic abnormality | 0.16 |
| caused by bacteria | 0.64 |
| caused by virus | 0.63 |
| treated with antibiotic | 0.61 |
| diagnosed | 0.55 |
| common in child | 0.38 |
| caused by fungus | 0.36 |
| caused by yeast | 0.34 |
| left untreated | 0.32 |