The Adaptive Developmental Quotient (DQ) is a ratio of the functional age to the chronological age. It is a means to simply express a developmental delay.
developmental quotient =
= ((developmental age) / (chronological age)) * 100
where:
• If the infant was born prematurely, the chronological age should be corrected for the gestational age at birth during the first year of life.
• The adaptive developmental quotient uses a development measure such as the Gesell scales. Similar quotients may use IQ or other measures.
Interpretation:
• maximum score (usually) is 100.
Developmental Quotient
Interpretation
> = 85
normal
71-84
mild-to-moderate delay
<= 70
severe delay
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