| Autistic group (n = 314) | Non-autistic group (n = 312) |
---|---|---|
Average age (years) | 41.9 (SD: 13.4), range 18–72 | 21.3 (SD: 6.4), range 18–63 |
Average age at diagnosis (years) | 34.6 (14.8), range 2–67 |  |
Sex | ||
 % male|female|other | 26.8|72.9|3 | 10.3|89.7|0 |
Gender identity | Â | Â |
 % Cisgender male | 25.2 | 10.3 |
 % Cisgender female | 57.3 | 88.8 |
 % Non-binary|Transgender | 14.6|2.9 | 3|6 |
Ethnicity | ||
 % Caucasian/White | 79.9, |  |
 % Black|Mixed race | 1.6|5.4 |  |
 % Other|No response | 4.3|8.8 |  |
Educational attainment | ||
 % GCSEs or equivalent | 94.9 | 99.4 |
 % Bachelors degree (obtained or studying for) | 70.1 | 89.1 |
 % Postgraduate qualifications | 35.7 | 1.6 |
Neurodevelopmental conditions | ||
 % ADHD|ADD | 17.2 | 2.2 |
 % Dyslexia|Dyspraxia | 8.9|8.6 | 7.1|1.9 |
 % Other specific learning disabilities | 6.4 | 1.3 |
Psychiatric conditions | ||
 % Depression|Anxiety|combined depression and anxiety | 7.9|9.6|39.8| | 4.2|8.3|11.2 |
 % PTSD/complex PTSD | 10.2 |  |
  % Eating disorders | 8.6 |  |
 % OCD|Other | 8.6|9.4 |  |
 % Single psychiatric condition | 18.2 |  |
 % Two psychiatric conditions | 27.4 |  |
 % 3 + psychiatric conditions | 23.2 |  |
 % No diagnosed psychiatric conditions | 31.2 |  |
History of NSSI | ||
 % With lifetime experience of NSSI | 72.6 | 51.3 |
Recency of NSSI (within self-harming groups) | ||
 % Over two years ago | 36.3 | 30.5 |
 % Between 1 and 2 years ago | 8.8 | 16.9 |
 % Between 6 months and 1 year ago | 6.6 | 15 |
 % Between 1 and 6 months ago | 13.6 | 15 |
 % In the last 4 weeks | 34.7 | 22.6 |
Average scores in study variables | ||
 ACWRSS total | 29.9 (SD 13.2), range 0–56 | 20 (SD 13.2), range 0–53 |
  Pain tolerance | 6.6 (SD 4.9), range 0–16 | 6.1 (SD 4.8), range 0–16 |
  Reduced fear of death | 7.5 (SD 5.2), range 0–16 | 4.6 (SD 4.2), range 0–15 |
  Mental rehearsal of suicide | 15.9 (SD 7.6), range 0–2 | 9.4 (SD 8.2)., range 0–2 |
 Patient Health Questionnaire-9 | 4 13 (SD 7.2), range 0–27 | 4 9.8 (SD 6.6), range 0–27 |