Furthermore, our analyses included index scores that contribute to an IQ score, which obviates the issue of covarying. An additional limitation to our study was the relatively large age range. While a large age range may increase variability and perhaps oversimplify important developmental changes, it allowed us to include a larger sample size, adding statistical power to our study. We addressed this limitation thoroughly, as our groups were equivalent on age, all measures had age-standardized scaled scores, and age-related variance was accounted for by including age as a covariate in the analyses. Demographic variables related to neuropsychological and executive function such as race, ethnicity and sex were evaluated as covariates in the current analysis, however socioeconomic status (SES) was not as it was not included during the implementation of the international CIFASD methodology. Further research would benefit from an investigation of home environment and SES on neurocognition in children with FASD.
