Rhiannon J Luyster, Karl C K Kuban, T Michael O’Shea, Nigel Paneth, Elizabeth N Allred, Alan Leviton, ELGAN Study investigators
Paediatr Perinat Epidemiol. 2011;25:366-76
M-CHAT items were failed more frequently by children with concurrently identified impairments (motor, cognitive, vision and hearing). In addition, the frequency of item failure increased with the severity of impairment. Importantly, four of the six M-CHAT ‘critical items’ were commonly affected by impairments. This suggests that impairments might give rise to false positive M-CHAT screening.