Concurrent validity of the parent-completed Ages and Stages Questionnaires, 2nd Ed. with the Bayley Scales of Infant Development II in a low-risk sample

Predictive and Construct Validity of the Bayley Scales of Infant Development and the Wechsler Preschool and Primary Scale of Intelligence with the Taiwan Birth Cohort Study Instrument

This study aimed to investigate the concurrent validity of the parent-report Taiwan Birth Cohort Study Developmental Instrument (TBCS–DI) with the Bayley Scales of Infant Development-Second Edition (BSID–II) and the Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R) at 6, 18, 36, and 60 months. 100 children were recruited at 6 months, 88 children followed-up at 18 months, 71 at 36 months, and 53 at 60 months. Longitudinally, the parent-report TBCS–DI, with the professional psychological assessments of the BSID–II and the WPPSI–R showed predictive validity. Looking at each time point in cross section, at 6 and 18 months the TBCS–DI had good concurrent validity with the BSID–II, and at 36 and 60 months the TBCS–DI was correlated only with the motor and performance domains of the BSID–II and WPPSI–R. With further investigation, the TBCS–DI may be used both in research and in clinical settings.

Increased nuchal translucency, normal karyotype and infant development

OBJECTIVE

To investigate whether chromosomally normal fetuses with a nuchal translucency (NT) ≥ 99th percentile(3.5 mm) in the first trimester have an increased risk of delayed development at 2 years of age.

METHODS

The study included children of women from 10 Danish hospitals who had fetal NT either ≥ 99th percentile (Group 1) or <95th percentile (Group 2) in the first trimester. The groups were matched by gender,gestational age at birth and maternal age. There were twice as many children in Group 2 as in Group 1. Follow-up was conducted at 2 years of age, infant development being assessed by the 'Ages and Stages Questionnaire'. The cutoff value for delayed development was defined as the 5th percentile from the first 100 questionnaires from Group 2.

RESULTS

In a 1-year period 202 of 33 266 fetuses (0.6%)had NT ≥ 3.5 mm. Of these, 99 (49.0%) were liveborn with normal karyotype and normal ultrasound findings during pregnancy. The response rate to the ASQ was 83.3% in Group 1 and 71.4% in Group 2. A low ASQ score was found in 1.3% (1/80) and 4.4% (6/137)in Groups 1 and 2, respectively (P = 0.265), but no difference was found in the mean ASQ score between the two groups (P = 0.160).

CONCLUSION

Fetuses with NT ≥ 99th percentile, normal karyotype and normal ultrasound findings during pregnancy had no increased risk of developmental delay at 2 years of age compared with fetuses with normal NT(<95th percentile).