| Outcome | Trial | Tool(s) | Duration of follow‐up | Between group difference |
| Behaviour problems | Bettison 1996 | Autism Behaviour Checklist, Developmental Behaviour Checklist | 12 months | Improved both groups Not significant |
| Edelson 1999 | Aberrant Behaviour Checklist ABC)†, Fisher's Auditory Problems Checklist (FAPC), Conners' Rating Scales ‐ Parent | 3 months | Not significant for FAPC and Conners' Rating Scales, significant improvement for ABC for AIT group |
| Mudford 2000 | Aberrant Behaviour Checklist‡, Nisonger Child Behaviour Rating Form ‐ Parent, observations from parents | 14 months | No significant improvement for combined behavioural data |
| Rimland 1995 | Aberrant Behaviour Checklist‡, Fisher's Auditory Problems Checklist | 3 months | Significant improvement for AIT group for both tools (including 4 of 5 subscales of ABC) |
| Veale 1993 | Fisher's Auditory Problems Checklist, Conners' Rating Scales ‐ Parent, Aberrant Behaviour Checklist† | 3 months | Not significant for all tools. |
| Zollweg 1997 | Aberrant Behaviour Checklist‡ | 9 months | Improved both groups (including each ABC subscale) Not significant |
| Cognitive ability | Mudford 2000 | Leiter International Performance Scale and Vineland Adaptive Behaviour Scores | 14 months | Neither group improved for all tools |
| Bettison 1996 | Leiter International Performance Scale | 12 months | Both groups improved |
| Corbett 2008 | Stanford‐Binet Intelligence Scale ‐ Fourth Edition | 9 months | Not applicable |
| Sound sensitivity | Zollweg 1997 | "Loudness discomfort levels" | 9 months | Not significant |
| Bettison 1996 | Sound sensitivity questionnaire | 12 months | Not significant. Improved both groups |
| Rimland 1995 | Hearing sensitivity questionnaire and a "Pure Tone Discomfort test" | 3 months | Neither group improved |
| Listening and comprehension | Rimland 1995 | Subgroup of Fisher's Auditory Problems Checklist | 3 months | Significant improvement for AIT group |
| Language | Corbett 2008 | Peabody Picture Vocabulary test, Expressive One Word Vocabulary Test | 9 months | Not significant for both tools |
| Bettison 1996 | Peabody Picture Vocabulary test | 12 months | Not significant |
| Adverse events | Bettison 1996 | Parental questionnaire (non‐standardised) | 12 months | Not significant |
| Rimland 1995 | Parental questionnaire | 3 months | Not significant |
