Maternal estimates of developmental age in preschool children

Objective: To investigate the accuracy of maternal estimates of developmental age in preschool children with suspected developmental delay. Methods: In a sample of 139 preschool children, aged 5 to 60 months, mothers were asked before evaluation to estimate the developmental age of their child. Maternal estimates were converted to a developmental quotient (DQ) and compared with results from standardized tests of cognitive functioning, adaptive abilities, expressive and receptive language, and visual-motor skills. Results: A high correlation was found (r = 0.82; p <0.0001) between maternal- estimate DQ and actual DQ (mean of test scores). Most mothers estimated within 15% of their child's actual functioning, and 84% of mothers estimated within ±5 months of actual functioning. Multiple regression found no factors that would identify mothers who were more or less accurate in estimating developmental age. Maternal-estimate DQ was sensitive (83%) and specific (83%) for mental retardation. Conclusion: Maternal estimates provide an accurate measure of developmental functioning and could be successfully incorporated into routine developmental surveillance of preschool children. (J PEDIATR 1994;125:S18-24)