Evaluation of the psychometric properties of the Spanish version of the Denver Developmental Screening Test II

Construction and validation of ShaMaq developmental screening tool

INTRODUCTION

The diagnosis of developmental delay and early intervention ameliorates long-term sequelae. There is a need for an appropriate, regionally adapted and reliable developmental screening tool to be used in low and middle-income countries with scarce resources.

AIM

The aim of this research is to construct and validate a screening tool for identifying developmental delay in Pakistani children.

METHOD

ShaMaq developmental screening tool (SDST) was developed consisting of five proformas to be administered at different age groups: 6-8 weeks (Group 1), 6-10 months (Group 2), 18-24 months (Group 3), 3-3.5 years (Group 4), and 4.5-5.5 years (Group 5). On an average, Groups 1-3 took 10-15 min, whereas Groups 4 and 5 took 20-25 min. We sampled children between the ages of 6 weeks to 5.5 years and tested them all within their designated age groups. Internal consistency was assessed by Cronbach's alpha. Interobserver testing was done for reliability and concurrent validity was undertaken by using the senior consultant developmental paediatrician's final diagnosis as the gold standard.

RESULTS

Out of 550 healthy children, 8-19% in the five groups were found to have some form of developmental delay using SDST. Approximately 50% of the families were in the low-to-moderate income bracket, and nearly 93% lived in a joint family system. Internal consistency of items in the five groups ranged from 0.784 to 0.940, whereas both interobserver reliability and concurrent validity ranged from 0.737 to 1.0. SDST showed 94.4% sensitivity and 92.9% specificity.

CONCLUSION

SDST is an effective tool for identifying delay in healthy children with good internal consistency, reliability, and validity.

[Psychometric properties of the Brazilian version of the Denver II: developmental screening test]

The scope of the Denver II Developmental Screening Test is to assess the development of children between 0 and 6 years of age. The aim of this study was to verify evidence of intra- and inter-examiner reliability, concurrent validity, sensitivity and specificity of the Brazilian version of Denver II. It involved a cross-sectional methodological study. A total of 254 children, between 0 and 72 months with risk of developmental delay, participated in the study. Two examiners verified the Denver II intra- and inter-examiner reliability. Concurrent validity, sensitivity and specificity were checked against the Brazilian version of the Ages & Stages Questionnaires as a criterion-referenced test. Statistical analysis used the Intraclass Correlation Coefficient, Spearman's Correlation Test and Contingency Table, the level of significance being α=0.05. The results identified that intra and inter examiner reliability was excellent in all age groups. Concurrent validity showed moderate to very strong rates in the 13-to-60-month age group. The sensitivity and specificity indices ranged from 73-99% and 58-92%, respectively. The Brazilian version of Denver II has good rates of psychometric properties and is a reliable and valid instrument to be applied to Brazilian children at risk of developmental delay.

Initial psychometric properties of the Denver II in a sample from Northeast Brazil

This paper assesses the initial psychometric properties of the Denver Developmental Screening Test (Denver II), a widely used child development measure in its first population-level administration in Brazil. The Portuguese version was administered to 2755 children under three years of age who were eligible for a home visiting program in Fortaleza, Northeast Brazil. We examine the measure's internal consistency and verify construct validity by testing the dimensionality through confirmatory factor analysis (CFA) and estimating associations with household socioeconomic variables (e.g., poverty, maternal education, stunting, and parenting practices). The test was found to be psychometrically robust and culturally relevant. Although we found a good fit with the structure proposed by the instrument's author, a structure of two latent variables (motor and cognitive) provided a better fit. This validity exercise provides useful information for policymakers and researchers interested in using this instrument in the Brazilian context or a similar one in the region.