Developmental delay and its associated factors among children of 9 months and of 18 months attending primary health facilities in an urban resettlement area of East Delhi.

It has been reported that prevalence of developmental delay increases from infancy (5.7%) to 12-23 months of age, peaks at 12-23 months age (20.3%), thereafter showing a decreasing trend to 15.3% as the age increased to more than 2 years.[ 6 ] Other population-based studies in India showed that the prevalence of any developmental delay ranges from 3.5% to 10%.[ 7 8 ] These wide variations in the prevalence of developmental delay could be due to usage of different scales in different population.

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