Table 2.
Frequency change N100 to 250 and 4000 Hz showing detection rate, mean and standard deviation (SD) latency (ms) and amplitude (µV). Not all AN subjects were tested with a 25 and 4% condition. Significance of t-tests and Fisher’s exact test comparing AN and controls are indicated by *.
| N100 | |||||||
|---|---|---|---|---|---|---|---|
| 250 Hz | 4000 Hz | ||||||
| condition | subjects | detection | ms | µV | detection | ms | µV |
| 50% | Controls | 15/15 | 105 (8) | −4.4 (1.6) | 15/15 | 101 (8) | −3.2 (1.3) |
| AN | 7/10 | 135 (29)** | −2.8 (1.7)* | 8/10 | 115 (13)** | −3.8 (1.6) | |
| 25% | Controls | 15/15 | 115 (12) | −3.9 (1.5) | 14/15 | 108(11) | −3.5 (1.7) |
| AN | 1/5** | 120 | −5.4 | 4/5 | 132 (29)* | −3.3 (0.9) | |
| 10% | Controls | 14/15 | 134 (20) | −3.2 (1.0) | 14/15 | 109 (11) | −3.0 (1.2) |
| AN | 3/10** | 154 (11) | −1.0 (1.7)* | 5/10* | 128 (19)* | −1.7 (0.9) | |
| 4% | Controls | 9/15 | 165(18) | −2.6 (0.7) | 11/15 | 112(9) | −2.8 (1.7) |
| AN | 1/5 | 165 | −2.2 | 2/5 | 133 (16) | −1.5 (0.2) | |
*
p<0.05;
**
p<0.01;
***
p<0.001