Table 1 Demographics for autistic and general population samples
|  | SPARK (n = 743) | HPP (n = 721) |
|---|---|---|
Age (years) | 30.91 (7.02) | 30.92 (13.01) |
Sex | ||
 Male | 271 (36.5%) | 253 (35.1%) |
 Female | 472 (63.5%) | 468 (64.9%) |
Gender identity | ||
 Cisgender man | 245 (33.0%) | – |
 Cisgender woman | 400 (53.8%) | – |
 Transgender man | 15 (2.0%) | – |
 Transgender woman | 6 (0.8%) | – |
 Non-binary | 76 (10.2%) | – |
Non-hispanic white | 590 (79.4%) | – |
Education | ||
 No high school diploma | 25 (3.4%) | – |
 High school diploma/GED | 140 (18.8%) | – |
 Vocational certificate | 36 (4.8%) | – |
 Some college | 197 (26.5%) | – |
 Associate degree | 74 (10.0%) | – |
 Bachelor’s degree | 171 (23.0%) | – |
 Graduate/professional degree | 100 (13.5%) | – |
Age of autism diagnosis (years) | 19.67 (11.17) | – |
Current depression | 440 (59.2%) | – |
Current anxiety | 533 (71.7%) | – |
Current suicidality | 292 (39.3%) | – |
Lifetime ADHD | 342 (46.0%) | – |
TAS-20 total score | 60.55 (13.11) | 50.21 (11.21) a |
TAS-16 total score (Prorated)b | 61.26 (14.17) | 51.38 (10.92) |
TAS-8 latent trait score | 1.01 (1.17) | 0.01 (0.93) |
"High alexithymia" (TAS-20 ≥ 61) | 405 (54.5%) | 123 (17.1%)a |