Table 1.
Study Flow Chart.
| Time points | Age (months) | Location | Groups and tools | |||
|---|---|---|---|---|---|---|
| 1 | 18–24 | Autism surveillance pathway | Surveillance as usual | |||
| Service data | Service data | |||||
| Waiting Room | Consent Demographics LTSAE; PEDS Q-CHAT-10 |
Consent Demographics |
||||
| Doctor's Office | SACS Online (GP completes) | Brief online form to inform research team of high ASD risk, type of concern, screening method used, and referrals and recommendation provided | ||||
| Developmental concerns (any) | No concerns | |||||
| Waiting Room | ASQ:SE (option to complete at home) | – | – | |||
| High ASD risk | Low ASD risk 10% complete | High ASD risk | Low ASD risk 10% complete | |||
| 2 | 24 | Research Site | Demographics | Demographics | Demographics | Demographics |
| ADOS-2 | ADOS-2 | ADOS-2 | ADOS-2 | |||
| ADI-R | ADI-R | ADI-R | ADI-R | |||
| MSEL | MSEL | MSEL | MSEL | |||
| SEQ | SEQ | SEQ | SEQ | |||
| ITSP | ITSP | ITSP | ITSP | |||
| VABS-3 | VABS-3 | VABS-3 | VABS-3 | |||
| 3 | 30 | Online | SRS-2 | SRS-2 | SRS-2 | SRS-2 |
| Semi-structured questionnaire | Semi-structured questionnaire | |||||
ADOS-2, Autism Diagnostic Observation Schedule Second Edition; ASD, Autism Spectrum Disorder; ADI-R, Autism Diagnostic Interview – Revised; ASQ:SE, Ages and Stages Questionnaire; ITSP, Infant Toddler Sensory Profile; LTSAE, Learn the Signs Act Early; MSEL, Mullen Scales of Early Learning; PEDS, Parents' Evaluation of Developmental Status; Q-CHAT, Quantitative Checklist for Autism in Toddlers; SACS-Online, Social Attention and Communication Surveillance – online; SEQ, Sensory Experiences Questionnaire - short form; SRS-2, Social Responsiveness Scale; VABS-3, Vineland Adaptive Behavior Scale 3rd Edition.