Table 1 Sample demographics of 6- and 12-month-old participants
| Â | 6-month dataset | 12-month dataset | |||
|---|---|---|---|---|---|
HR-ASD, n = 14 | HR-noASD, n = 40 | HR-ASD, n = 27 | Matching HR-ASD, n = 14 | HR-noASD, n = 40 | |
Sex | 8 M, 6 F | 19 M, 21 F | 17 M, 10 F | 8 M, 6 F | 18 M, 22 F |
Child ethnicity (%) | |||||
 Caucasian | 92.9 | 97.5 | 77.8 | 92.9 | 95 |
 Hispanic/Latinx | 21.4 | 2.5 | 14.8 | 21.4 | 7.5 |
 Asian American | 0 | 0 | 3.7 | 0 | 0 |
 African American | 0 | 0 | 3.7 | 0 | 0 |
 Multirace | 7.1 | 2.5 | 14.8 | 7.1 | 7.1 |
Mean household income ($1000s) | 65‑75 | 65‑75 | 65‑75 | 65‑75 | 65‑75 |
Mean maternal education (%) | |||||
 < 4-year college | 28.6 | 27.5 | 37 | 28.6 | 25 |
 = 4-year college | 35.7 | 15 | 37 | 42.9 | 12.5 |
 > 4-year college | 35.7 | 57.5 | 25.9 | 28.5 | 62.5 |
EEG HAPPE metrics (mean [SD]) | |||||
 Length of raw EEG (s) | 701.3 [212.9] | 693.6 [220.7] | 763.7 [213] | 735.8 [225.2] | 764.8 [209.5] |
 Good channels (%) | 93.1 [4.1] | 94.2 [4.7] | 92 [4.8] | 91.6 [4.7] | 92.8 [5.5] |
 Rejected components (%) | 47 [13] | 44.1 [13] | 43.8 [10] | 42.6 [8.4] | 43.4 [12.2] |
 EEG variance retained (%) | 61.6 [13.3] | 64.9 [17.4] | 66.5 [12.6] | 70.1 [10.5] | 69.6 [16] |
 Mean retained artifact probability | 0.16 [0.05] | 0.17 [0.03] | 0.15 [0.05] | 0.16 [0.05] | 0.15 [0.04] |
 Median retained artifact probability | 0.13 [0.06] | 0.15 [0.06] | 0.1 [0.07] | 0.11 [0.07] | 0.1 [0.06] |