Table 2.
Notch prevalence (%) in both ears for dental and non-dental students
| Right ear | Left ear | |||
|---|---|---|---|---|
| Dental students prevalence (95% CI) | Non-dental students prevalence (95% CI) | Dental students prevalence (95% CI) | Non-dental students prevalence (95% CI) | |
| Coles et al.’s criteria | ||||
| Notch in at least one frequency | 17.65 | 7.17 | 19.61 | 8.77 |
| (10.81–26.45) | (4.31–11.10) | (12.41–28.65) | (5.58–12.97) | |
| Notch in at least two frequencies | 2.94 | 1.59 | 3.92 | 1.99 |
| (0.61–8.36) | (0.44–4.03) | (1.08–9.74) | (0.65–4.59) | |
| Notch at 3 kHz | 5.88 | 1.59 | 2.94 | 3.19 |
| (2.19–12.37) | (0.44–4.03) | (0.61–8.36) | (1.39–6.18) | |
| Notch at 4 kHz | 6.86 | 3.98 | 15.69 | 5.18 |
| (2.80–13.6) | (1.93–7.20) | (9.24–24.22) | (2.79–8.69) | |
| Notch at 6 kHz | 9.8 | 3.19 | 6.86 | 2.39 |
| (4.80–17.29) | (1.39–6.18) | (2.80–13.6) | (0.88–5.13) | |
| Niskar et al.’s criteria* | ||||
| Presence of a notch | 4.9 | 0.8 | 10.78 | 0.8 |
| (1.61–11.7) | (0.10–2.85) | (5.51–18.48) | (0.10–2.85) | |
*It is not possible to determine more than one notch in the same ear when the Niskar’s criterion is used.