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Some characteristics of the cases under the study
| Variable | Frequency | Percent | |
|---|---|---|---|
| Gender | Girl | 191 | 52.6 |
| Boy | 172 | 47.4 | |
| Smoking among family members | Yes | 53 | 14.6 |
| No | 310 | 85.4 | |
| Antibiotic taking | Yes | 220 | 60.6 |
| No | 143 | 39.4 | |
| Hospitalization | Yes | 30 | 8.3 |
| No | 333 | 91.7 | |
| Otitis media | Yes | 53 | 14.6 |
| No | 310 | 85.4 | |
| Adenoidectomy | Yes | 35 | 9.6 |
| No | 328 | 90.4 |
