TABLE 3.
Mean DPOAE level (dB SPL) and SD for preterm and postnatal longitudinal databases
| Preterm database |
Postnatal database |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| F2(Hz) | 33 wks PCA | 34 wks PCA | 35 wks PCA | 36 wks PCA | 37 wks PCA | Term* (38–40 wks) | 3 mo | 4 mo | 5 mo | 6 mo |
| 1500 | ||||||||||
| Mean | 18.1 | 12.7 | 17.2 | 18.5 | 13.9 | 13.8 | 11.4 | 13.3 | 11.8 | 11.5 |
| SD | 7.5 | 0.9 | 4.9 | 4.7 | 2.2 | 5.7 | 9.3 | 5.2 | 6.3 | 6.9 |
| 2000 | ||||||||||
| Mean | 11.8 | 10.5 | 13.2 | 14.5 | 15.1 | 11.5 | 11.9 | 11.8 | 10.5 | 11.4 |
| SD | 6.1 | 3.5 | 4.1 | 2.1 | 5.8 | 5.3 | 7.2 | 5.5 | 5.9 | 6.7 |
| 3000 | ||||||||||
| Mean | 7.1 | 10.0 | 11.3 | 11.2 | 12.1 | 9.2 | 10.3 | 8.5 | 11.1 | 10.1 |
| SD | 4.9 | 6.1 | 6.1 | 5.0 | 4.8 | 4.0 | 5.6 | 6.3 | 4.3 | 4.3 |
| 4500 | ||||||||||
| Mean | 9.1 | 10.6 | 12.9 | 11.6 | 12.4 | 10.1 | 13.9 | 10.4 | 13.6 | 10.8 |
| SD | 5.0 | 5.7 | 7.1 | 5.2 | 3.7 | 4.9 | 5.1 | 8.4 | 3.7 | 7.7 |
| 6000 | ||||||||||
| Mean | 10.4 | 10.9 | 10.0 | 10.7 | 12.6 | 12.8 | 10.4 | 10.2 | 12.0 | 9.9 |
| SD | 5.8 | 5.6 | 6.9 | 6.4 | 5.5 | 5.1 | 7.4 | 6.9 | 4.3 | 7.6 |
| 8000 | ||||||||||
| Mean | — | — | — | — | — | 8.2 | 9.8 | 10.0 | 11.2 | 9.4 |
| SD | — | — | — | — | — | 4.4 | 9.6 | 4.5 | 5.3 | 6.7 |
| 9000 | ||||||||||
| Mean | 5.9 | 7.4 | 8.1 | 10.4 | 6.8 | 10.1 | — | — | — | — |
| SD | 5.5 | 6.1 | 5.5 | 5.0 | 5.6 | 8.1 | — | — | — | — |
*
Combined data from both databases and includes between 12 and 33 observations at each F2.