Table 4.
Mean (s.d.) speech-ABR amplitude (μV) and latency (ms) values for mTBI subgroups
| Left | Right | ||||
|---|---|---|---|---|---|
| Group A | Group B | Group A | Group B | ||
| Amplitude Click-ABR | I | 0.19 (0.33) | 0.10 (0.10) | 0.20 (0.32) | 0.14 (0.13) |
| III | 0.33 (0.33) | 0.27 (0.14) | 0.35 (0.26) | 0.32 (0.17) | |
| V | 0.55 (0.35) | 0.51 (0.21) | 0.55 (0.30) | 0.48 (0.19) | |
|
| |||||
| Amplitude Speech-ABR Quiet | V | 0.10 (0.05) | 0.09 (0.06) | 0.09 (0.06) | 0.05 (0.02) |
| A | −0.15 (0.07) | −0.14 (0.03) | −0.16 (0.07) | −0.14 (0.03) | |
| D | −0.11 (0.10) | −0.10 (0.05) | −0.08 (0.08) | −0.10 (0.06) | |
| E | −0.18 (0.08) | −0.19 (0.06) | −0.05 (0.05) | −0.09 (0.04) | |
| F | −0.14 (0.08) | −0.15 (0.07) | −0.15 (0.09) | −0.15 (0.06) | |
| O | −0.13 (0.05) | −0.15 (0.10) | −0.17 (0.08) | −0.15 (0.07) | |
| V-A amp | 0.25 (0.12) | 0.23 (0.07) | 0.26 (0.10) | 0.19 (0.06) | |
| V-A area | 0.16 (0.08) | 0.15 (0.06) | 0.15 (0.05) | 0.10 (0.04) | |
|
| |||||
| Amplitude Speech-ABR Noise | V | 0.07 (0.05) | 0.03 (0.03) | 0.07 (0.05) | 0.04 (0.05) |
| A | −0.12 (0.07) | −0.12 (0.05) | −0.12 (0.08) | −0.11 (0.06) | |
| D | −0.05 (0.05) | −0.09 (0.04) | −0.07 (0.05) | −0.09 (0.05) | |
| E | −0.15 (0.08) | −0.13 (0.04) | −0.12 (0.08) | −0.13 (0.06) | |
| F | −0.17 (0.10) | −0.13 (0.06) | −0.14 (0.10) | −0.14 (0.09) | |
| O | −0.17 (0.09) | −0.12 (0.07) | −0.14 (0.07) | −0.13 (0.07) | |
| V-A amp | 0.20 (0.08) | 0.15 (0.06) | 0.21 (0.08) | 0.17 (0.07) | |
| V-A area | 0.14 (0.08) | 0.10 (0.03) | 0.14 (0.08) | 0.13 (0.05) | |
|
| |||||
| Left | Right | ||||
| Group A | Group B | Group A | Group B | ||
|
| |||||
| Latency Click-ABR | I | 1.64 (0.22) | 1.70 (0.16) | 1.59 (0.18) | 1.68 (0.19) |
| III | 3.73 (0.22) | 3.83 (0.19) | 3.71 (0.20) | 3.87 (0.18) | |
| V | 5.82 (0.33) | 5.90 (0.21) | 5.84 (0.34) | 5.89 (0.20) | |
|
| |||||
| Latency Speech-ABR Quiet | V | 6.76 (0.54) | 6.81 (0.44) | 6.99 (0.78) | 6.93 (0.24) |
| A | 7.93 (0.52) | 7.99 (0.39) | 8.13 (0.85) | 7.97 (0.28) | |
| D | 23.55 (0.82) | 23.72 (0.99) | 23.90 (1.50) | 23.49 (1.04) | |
| E | 31.46 (0.84) | 31.60 (0.40) | 31.69 (0.98) | 32.05 (0.60) | |
| F | 39.82 (0.74) | 39.91 (0.57) | 39.85 (0.91) | 40.06 (0.59) | |
| O | 48.53 (0.65) | 48.72 (0.75) | 48.55 (0.75) | 49.10 (0.65) | |
| V-A lat | 1.17 (0.32) | 1.19 (0.29) | 1.14 (0.27) | 1.04 (0.21) | |
| V-A slope | −0.23 (0.12) | −0.19 (0.04) | −0.26 (0.12) | −0.19 (0.04) | |
|
| |||||
| Latency Speech-ABR Noise | V | 6.95 (0.67) | 6.76 (0.23) | 7.16 (0.74) | 7.06 (0.36) |
| A | 8.20 (0.59) | 7.89 (0.33) | 8.37 (0.87) | 8.37 (0.45) | |
| D | 24.42 (1.49) | 23.83 (1.42) | 23.95 (1.43) | 23.41 (0.70) | |
| E | 31.49 (0.73) | 31.45 (0.78) | 31.54 (0.99) | 31.62 (0.58) | |
| F | 39.91 (0.98) | 40.16 (0.64) | 39.97 (0.94) | 39.93 (0.57) | |
| O | 48.61 (0.68) | 48.95 (0.69) | 48.64 (0.63) | 49.12 (0.41) | |
| V-A lat | 1.25 (0.32) | 1.12 (0.26) | 1.21 (0.31) | 1.31 (0.32) | |
| V-A slope | −0.16 (0.07) | −0.14 (0.06) | −0.19 (0.09) | −0.14 (0.06) | |
Group A = normal auditory behavioral test performance, Group B = abnormal auditory behavioral test performance