Table 1.
Distribution of covariates of interest stratified by SRS group
| Social responsiveness score | p value | Total N (prop) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lower | Middle | Upper | ||||||||
| 2791 | (39.84) | 2417 | (34.50) | 1797 | (25.65) | 7005 | ||||
| Sex, N (%) | ||||||||||
| Female | 1471 | (44.49) | 1145 | (34.63) | 690 | (20.87) | ||||
| Male | 1320 | (35.69) | 1272 | (34.39) | 1107 | (29.92) | < 0.0001 | 7005 | (100.00) | |
| Age, mean (SD) | ||||||||||
| Years | 9.88 | (± 0.01) | 9.90 | (± 0.01) | 9.90 | (± 0.01) | 0.2090 | 7005 | (100.00) | |
| Ethnicity, N (%) | ||||||||||
| White | 1494 | (42.07) | 1196 | (33.68) | 861 | (24.25) | ||||
| Black/African American | 364 | (36.25) | 365 | (36.35) | 275 | (27.39) | ||||
| Hispanic | 585 | (37.40) | 547 | (34.97) | 432 | (27.62) | ||||
| Other | 348 | (39.28) | 309 | (34.88) | 229 | (25.85) | 0.0060 | 7005 | (100.00) | |
| Cognition, mean (SD) | ||||||||||
| Standardised score | 103.77 | (± 0.33) | 102 | (0.38) | 97.76 | (± 0.45) | < 0.0001 | < 0.0001 | 6769 | (96.63) |
| Externalising symptoms, mean (SD) | ||||||||||
| Standardised score | 42.21 | (± 0.16) | 45.69 | (0.19) | 52.22 | (± 0.26) | < 0.0001 | < 0.0001 | 7003 | (99.97) |
| Internalising symptoms, mean (SD) | ||||||||||
| Standardised score | 44.72 | (± 0.17) | 49.04 | (0.20) | 56.01 | (± 0.25) | < 0.0001 | < 0.0001 | 7003 | (99.97) |
| ICV, mean (SD) | ||||||||||
| mm3 | 1,510,210 | (± 2795.58) | 1,512,337 | (± 2986.24) | 1,506,107 | (± 3554.96) | 0.605 | 0.3600 | 7005 | (100.00) |
| SC volume, mean (SD) | ||||||||||
| mm3 | 60,301 | (± 94.51) | 60,296 | (± 99.73) | 60,101 | (± 121.24) | 0.972 | 0.1860 | 7005 | (100.00) |
| Family income, N (%) | ||||||||||
| $34,999 or less | 400 | (29.50) | 491 | (36.21) | 465 | (34.29) | ||||
| $99,999 or less | 882 | (39.10) | 789 | (34.97) | 585 | (25.93) | ||||
| $199,999 or less | 917 | (45.13) | 686 | (33.76) | 429 | (21.11) | ||||
| $200,000 + | 407 | (49.69) | 256 | (31.26) | 156 | (19.05) | < 0.0001 | 6463 | (92.26) | |
Reported p values generated by univariate regression modelling for continuous variables and chi2 testing for categorical variables
ICV Intracranial volume, SC Subcortical