Variable Median Range Internal consisstency of  dev. age Internal consisstency of  dev. quotient Spearman’s rank correlation coefficients with ASQ-3 (n=240) **P<0.01, *P<0.05 communication gross motor fine motor problem solving personal-social ｒ ｒ ｒ ｒ ｒ Family-rated KIDS Cronbach’s α Cronbach’s α           total dev. age, mo 16.50 1-63 0.428** 0.663** 0.417** 0.450** 0.600** dev. quotient 100.00 4.76-300 0.445** 0.318** 0.311** 0.319** 0.316** physical motor dev. age, mo 16.00 1-72 0.969 0.942 0.363** 0.667** 0.387** 0.387** 0.568** dev. quotient 91.30 1-63 0.361** 0.529** 0.373** 0.303** 0.411** manipulation dev. age, mo 18.00 1-63 0.401** 0.646** 0.416** 0.447** 0.599** dev. quotient 100.00 3.17-250 0.445** 0.388** 0.420** 0.380** 0.417** eceptive language dev. age, mo 18.00 1-82 0.403** 0.621** 0.362** 0.407** 0.538** dev. quotient 108.33 4.76-400 0.432** 0.211** 0.155** 0.254** 0.214** expressive language dev. age, mo 15.00 2-70 0.478** 0.637** 0.396** 0.467** 0.570** dev. quotient 97.84 8.7-450 0.437** 0.197** 0.185** 0.271** 0.193** language concepts dev. age, mo 16.00 15-78 0.528** 0.251** 0.056 0.349** 0.402** dev. quotient 104.76 23.81-184.62 0.290** 0.371** 0.343 0.247** 0.265** social relationships with children dev. age, mo 21.00 12-73 0.520** 0.277** 0.134 0.434** 0.408** dev. quotient 88.46 19.05-176.92 0.314** 0.409** 0.462** 0.345** 0.334** social relationships with adults dev. age, mo 17.00 2-69 0.394** 0.613** 0.374** 0.386** 0.552** dev. quotient 100.00 3.17-250.00 0.385** 0.304* 0.274** 0.237** 0.290** discipline dev. age, mo 27.00 16-74 0.401** 0.152 0.025 0.226** 0.368** dev. quotient 101.82 25.4-194.44 0.056 0.233** 0.341** 0.049 0.215** feeding dev. age, mo 13.00 1-36 0.417** 0.692** 0.448** 0.463** 0.612** dev. quotient 84.13 1.59-200 0.327** 0.304** 0.313** 0.277** 0.291**     with ABMS with WeeFIM (n=233)                 ABMS-C (n=212) ABMS-CT (n=213) motor cognitive Age, mo (n=307) Period of gestation, w (n=291) Birth weight, g (n=297) Variable      ｒ    ｒ    ｒ    ｒ    ｒ    ｒ    ｒ Family-rated KIDS total dev. age, mo 0.878** 0.863** 0.891** 0.894** 0.839** 0.126 0.116 dev. quotient 0.041 0.062 ー0.169 ** ー0.146* ー0.395** 0.353** 0.299** physical motor dev. age, mo 0.908** 0.849** 0.885** 0.845** 0.788** 0.096 0.109 dev. quotient 0.305** 0.236** 0.041 0.038 ー0.197** 0.256** 0.287** manipulation dev. age, mo 0.857** 0.857** 0.880** 0.887** 0.810** 0.123* 0.109 dev. quotient 0.138* 0.206** ー0.039 ー0.006 ー0.224** 0.315** 0.281** eceptive language dev. age, mo 0.846** 0.831** 0.861** 0.877** 0.803** 0.109 0.090 dev. quotient 0.033 0.113 ー0.119 ー0.084 ー0.311** 0.267** 0.240** expressive language dev. age, mo 0.783** 0.817** 0.803** 0.847** 0.749** 0.131* 0.119* dev. quotient ー0.048 0.045 ー0.198** ー0.128 ー0.361** 0.269** 0.239** language concepts dev. age, mo 0.507** 0.802** 0.806** 0.787** 0.643** 0.178* 0.107 dev. quotient 0.133 0.114 ー0.059 0.036 ー0.426** 0.221** 0.207** social relationships with children dev. age, mo 0.540** 0.799** 0.785** 0.803** 0.623** 0.230** 0.118 dev. quotient 0.237** 0.267** 0.088 0.199* ー0.262** 0.200* 0.161* social relationships with adults dev. age, mo 0.841** 0.836** 0.859** 0.881** 0.788** 0.093 0.082 dev. quotient 0.161* 0.160* ー0.013 0.037 ー0.250** 0.250** 0.220** discipline dev. age, mo 0.539** 0.804* 0.846** 0.799** 0.664** 0.156* 0.081 dev. quotient 0.162 0.087 ー0.027 0.001 ー0.477** 0.163* 0.178* feeding dev. age, mo 0.837** 0.819** 0.859** 0.848** 0.729** 0.129* 0.120* dev. quotient ー0.135* ー0.169* ー0.310** ー0.284** ー0.531** 0.223** 0.252** KIDS= Kinder Infant Development Scale, SAQ-3= Ages & Stages Questionnaires, Third Edition, ABMS-C=Ability for Basic Movement Scale for Children, ABMS-CT=Ability for Basic Movement Scale for Children type T, Wee FIM=Functional Independence Measure for Children

Table 2: Correlations among the KIDS scores, other scales, age, period of gestation, and birth weight.