Table A1.
Description of the control group.
| Author (Year) | Intervention Group (n) | Control Group (n) | Control Group |
|---|---|---|---|
| Dawson (2010) [25] | 24 | 24 | Treatment as usual, plus intervention recommendations, community referrals, and reading material |
| Rogers (2012) [26] | 49 | 49 | Treatment as usual |
| Rogers (2014) [13] | 7 | 25 | Treatment as usual |
| Vivanti (2014) [23] | 27 | 30 | Group-based “generic” intervention program for children with autism spectrum disorders (ASD) |
| Fox (2018) [21] | 5 | 5 | Waitlist |
| Zhou (2018) [22] | 23 | 20 | Treatment as usual |
| Xu (2018) [27] | 20 | 20 | Eclectic intervention services matching the amount of time the Early Start Denver Model (ESDM) group received |
| Colombi (2018) [28] | 22 | 70 | Treatment as usual |
| Vinen (2018) [24] | 31 | 28 | Group-based eclectic intervention program for children with ASD |
| Vismara (2018) [29] | 16 | 14 | Monthly check-ins and access to online material |
| Holzinger (2019) [30] | 7 | 6 | Treatment as usual |
| Rogers (2019) [31] | 55 | 63 | Treatment as usual |