Delayed CC improved the adjusted mean differences ( AMDs ) in the ASQ personal-social ( AMD , 2.8 ; 95 % CI , 0.8-4 .7 ) and fine-motor ( AMD , 2.1 ; 95 % CI , 0.2-4 .0 ) domains and the Strengths and Difficulties Questionnaire prosocial subscale ( AMD , 0.5 ; 95 % CI , > 0.0-0 .9 ) .