Table 2.
Demographic and behavioral results (IMAGEN behavioral sample).
| Demographics | Age 14 (605) | Age 18 (1169) | Age 22 (997) | p-value |
|---|---|---|---|---|
| Age (SD) | 13.94 (0.74) | 18.02 (2.07) | 21.90(1.92) | 0 |
| Gender (Female/Male) | 331/274 | 614/555 | 525/472 | p=0.650 |
| SST Performance | ||||
| Go Accuracy (%) | 93.86(4.28) | 94.08(4.56) | 93.89(4.81) | p=0.296 |
| Stop Accuracy (%) | 48.00(1.70) | 50.13(1.48) | 50.13(1.51) | p<0.001 |
| SSRT (ms) | 215.76 (30.82) | 216.64(38.92) | 220.23(37.54) | p=0.001 |
| Go RT (ms) | 416.78(54.27) | 388.96(55.58) | 393.39(61.98) | p<0.001 |
| IIRV (ms) | 96.57(22.11) | 85.58(24.81) | 83.97(26.56) | p<0.001 |
Behavioral measures included Go accuracy, Stop accuracy, Go reaction time (GoRT), ), stop-signal reaction time (SSRT), and intra-individual response variability (IIRV). Linear mixed model was used to test the main effect of development on behavioral performance and head motion; p-values are reported. Sex distribution differences across visits were tested with chi-square tests.