TABLE 2.
Correlation with Age | Correlation with CSS RTT, n = 34 | |||||
---|---|---|---|---|---|---|
TD, n = 20 | RTT, n = 34 | |||||
Measurement | r | P | r | P | r | P |
N1 latency | −0.23 | 0.326 | 0.32 | 0.069 | −0.26 | 0.136 |
P1 latency | 0.02 | 0.935 | 0.20 | 0.263 | −0.37 | 0.031 |
N2 latency | 0.16 | 0.513 | −0.02 | 0.933 | −0.04 | 0.845 |
P1–N2 time | 0.17 | 0.484 | −0.05 | 0.776 | −0.04 | 0.808 |
N1 amplitude | 0.22 | 0.349 | 0.36 | 0.036 | 0.19 | 0.276 |
N1–P1 amplitude | 0.16 | 0.508 | −0.32 | 0.070 | −0.18 | 0.313 |
P1–N2 amplitude | 0.20 | 0.394 | −0.31 | 0.079 | −0.07 | 0.712 |
Latency values are in milliseconds, and amplitude values are in microvolts. r indicates Spearman correlation coefficient. Significance threshold was set to p < 0.007 after correction for multiple comparisons.
CSS = Clinical Severity Score; RTT = Rett syndrome; TD = typically developing; VEP = visual evoked potential.