Clinical Study
A Prevalence Study of Hearing Loss among Primary School Children in the South East of Iran
Table 2
Frequency distribution of types of tympanogram based on school grade.
| Tympanogram | Grade | ā | 6 | 7 | 8 | 9 | 10 | Total | Fr. | Percent | Fr. | Percent | Fr. | Percent | Fr. | Percent | Fr. | Percent | Fr. | Percent |
| A | 243 | 81% | 266 | 88.7% | 267 | 89% | 275 | 91.7% | 275 | 91.7% | 1326 | 88.4% | B | 12 | 4% | 10 | 3.3% | 6 | 2% | 6 | 2% | 6 | 2.3% | 41 | 2.7% | C | 45 | 15% | 24 | 8% | 27 | 9% | 19 | 6.3% | 18 | 6% | 133 | 8.9% |
| Total | 300 | 100% | 300 | 100% | 300 | 100% | 300 | 100% | 300 | 100% | 1500 | 100% |
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Fr.: frequency.
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