Selection bias on intellectual ability in autism research: a cross-sectional review and meta-analysis.

ABSTRACT:

Background

Current global estimates suggest the proportion of the population with autism spectrum disorder (ASD) who have intellectual disability (ID) is approximately 50%. Our objective was to ascertain the existence of selection bias due to under-inclusion of populations with ID across all fields of autism research. A sub-goal was to evaluate inconsistencies in reporting of findings.

Methods

This review covers all original research published in 2016 in autism-specific journals with an impact factor greater than 3. Across 301 included studies, 100,245 participants had ASD. A random effects meta-analysis was used to estimate the proportion of participants without ID. Selection bias was defined as where more than 75% of participants did not have ID.

Results

Meta-analys

SUBMITTER: Russell G 

PROVIDER: S-EPMC6397505 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature