The Home Situations Questionnaire-Autism Spectrum Disorder declined 55 % ( from 4.0 to 1.8 ) compared with 34.2 % in parent education ( 3.8 to 2.5 ) ( treatment effect , -0.7 ; 95 % CI , -1.1 to -0.3 ; P < .001 , standardized effect size = 0.45 ) .