| Starr et al.
23
, 2005 |
Individuals with DS and severe intellectual disability |
13 |
7 to 31 |
Autism Diagnostic Interview-Revised (ADI-R) and Adapted Pre-Linguistic Autism Diagnostic Observation Schedule (A-PL-ADOS) |
Parents |
DSM-IV and CID-10 |
- |
1.16:1 |
| Carter et al.
24
, 2006 |
Individuals with DS |
127 |
2 to 24 |
Autism Behavior Checklist and Aberrant Behavior Checklist |
Parents |
DSM‐IV |
- |
2.33:1 |
| Hepburn et al.
6
, 2007 |
Children with SD |
20 |
2 to 3 |
Autism Diagnostic Interview-Revised and Autism Diagnostic Observation Schedule-Generic |
Parents |
DSM-IV TR |
- |
2.45:1 |
| Dressler et al.
18
, 2011 |
Individuals with DS and/or autism living with their family |
24 |
6 to 34 |
Childhood Autism Rating Scale (CARS) |
Parents |
DSM-IV TR |
- |
0.84:1 |
| Ji et al.
25
, 2011 |
Individuals with DS |
293 |
2 to 13 |
Autism Behavior Checklist |
Not informed |
DSM-IIIR and DSM-IV |
- |
3.16:1 |
| Magyar et al.
28
, 2012 |
Individuals with DS |
71 |
4 to 14 |
Archival Social Communication Questionnaire (SCQ), Autism Diagnostic Interview-Revised (ADI-R) and Autism Diagnostic Observation Schedule |
Not informed |
DSM-IV |
- |
1.29:1 |
| Pandolfi et al.
7
, 2017 |
Individuals with DS |
71 |
3 to 15 |
Pervasive Developmental Disorder in Mental Retardation Scale (PDD- MRS), Social Communication Questionnaire - Lifetime Version (SCQ-L) and Autism Diagnostic Interview-Revised (ADI-R) |
Parents |
DSM-IV- TR |
- |
1.15:1 |
| Godfrey et al.
28
, 2019 |
Individuals with DS born between January 1, 1996, and December 21, 2003, and who had a caregiver who spoke English or Spanish fluently |
33 |
born between 1996 and 2003 |
Autism Diagnostic Observation Schedule (ADOS) and Autism Diagnostic Interview-Revised (ADI-R) |
Parents |
DSM-V |
- |
2.01:00 |
| Oxelgren et al.
29
, 2019 |
Individuals with DS |
60 |
5 to 17 |
Autism Diagnostic Interview-Revised (ADI-R) and Autism Diagnostic Observation Schedule (ADOS) |
Parents |
Not informed |
- |
1.8:1 |
| Capone et al.
29
, 2005 |
Individuals with DS |
131 |
2 to 21 |
Behavior questionnaires, semi-structured neurological development assessment and observation during play or social interactions |
Parents |
DSM-IV |
12.9% |
2.7:1 |
| DiGuiseppi et al.
8
, 2010 |
Individuals with DS born between January 1, 1996, and December 21, 2003, and who had a caregiver who spoke English or Spanish fluently |
123 |
2 to 21 |
Behavior questionnaires, semi-structured neurological development assessment and observation during play or social interactions |
Parents |
DSM-IV TR |
AUT 6.4% TEA 11.8% Total 18.2% |
1.86:1 |
| Moss et al.
30
, 2013 |
Participants were included if there was information on the date of birth and diagnosis of DS from a professional (physician, clinical geneticist, pediatrician or other), if at least 75% of the SCQ (Rutter et al., 2003) had been completed and if the participant with SD was at least 4 years of age. |
108 |
4 to 62 |
Social Communication Questionnaire (SCQ) |
Parents |
Not informed |
19% |
0.7:1 |
| Warner et al.
31
, 2014 |
Individuals with DS |
160 |
4 to 40 |
Lifetime version of the Social Communication Questionnaire (SCQ) and Strengths and Difficulties Questionnaire |
Parents |
Not informed |
AUT 16,5% TEA 37.7% |
1.2:1 |
