Table 2.
Comparison of results among term and preterm subjects relative to the minimum tone burst ABR and ASSR responses (in dBnHL and dBSPL), V wave latency in ms (tone burst ABR), absolute and relative times (tone burst ABR and ASSR), minimum ASSR (in dBHL and dBSPL), and the number of sweeps to measure the minimum ASSR.
| Mean | Median | Standard deviation | Q1 | Q3 | N | CI | p-value | ||
|---|---|---|---|---|---|---|---|---|---|
| GT | 31.6 | 30 | 3.7 | 30 | 30 | 38 | 1.2 | ||
| TB ABR (nHL) | GPT | 33.2 | 30 | 4.7 | 30 | 40 | 34 | 1.6 | 0.101 |
| TB ABR (SPL) | GT | 51.6 | 50 | 3.7 | 50 | 50 | 38 | 1.2 | 0.101 |
| GPT | 53.2 | 50 | 4.7 | 50 | 60 | 34 | 1.6 | ||
| Wave V latency | GT | 10.8 | 11 | 0.9 | 10.2 | 11.3 | 38 | 0.3 | 0.134 |
| GPT | 10.6 | 11 | 1.0 | 9.9 | 10.9 | 34 | 0.3 | ||
| GT | 20.9 | 19 | 5.4 | 17.0 | 23.5 | 19 | 2.4 | 0.644 | |
| TB Δt abs | GPT | 21.4 | 20 | 5.8 | 17 | 23 | 17 | 2.8 | |
| GT | 18.6 | 17 | 3.3 | 16 | 20 | 19 | 1.5 | 0.472 | |
| TB Δt rel | GPT | 19.4 | 19 | 3.9 | 17 | 20 | 17 | 1.8 | |
| ASSR (HL) | GT | 13.3 | 17 | 5.9 | 7 | 17 | 38 | 1.9 | 0.483 |
| GPT | 14.4 | 17 | 6.2 | 7 | 17 | 34 | 2.1 | ||
| ASSR (SPL) | GT | 26.3 | 30 | 5.9 | 20 | 30 | 38 | 1.9 | 0.919 |
| GPT | 26.6 | 30 | 6.0 | 20 | 30 | 34 | 2.0 | ||
| Sweeps | GT | 191.1 | 140 | 126.6 | 80 | 320 | 38 | 40.2 | 0.536 |
| GPT | 203.5 | 160 | 121.6 | 120 | 310 | 34 | 40.9 | ||
| Δt abs EE | GT | 18.7 | 16 | 6.6 | 14 | 22 | 19 | 3.0 | 0.028* |
| GPT | 25.7 | 22 | 13.9 | 19 | 27 | 17 | 6.6 | ||
| Δt rel EE | GT | 17.5 | 16 | 5.3 | 13.5 | 19.5 | 19 | 2.4 | 0.039* |
| GPT | 23.6 | 20 | 13.3 | 17 | 22 | 17 | 6.3 |
GT - term group; GPT - preterm group; Q1 - 1st quartile; Q3 - 3rd quartile; N - number in the series; CI - confidence interval; TB Δt abs - tone burst ABR absolute time; TB Δt rel - tone burst ABR relative time; Δt abs EE -ASSR absolute time; Δt rel EE - ASSR relative time.
*
p-value < 0.05