This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

Developmental quotient (DQ)

Developmental age / chronological age × 100 – ≤ 70 marked delay, > 70 to < 85 borderline, ≥ 85 age-appropriate

Child

Chronological age

Gestational age at birth (preterm infants only) (weeks)

For birth before 37 weeks of gestation, chronological age up to and including 24 months is adjusted by the weeks missing until term (40 weeks' gestation) corrected.

Test

Developmental age according to test

Domain (optional)

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

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Sources

Predictors of severity and outcome of global developmental delay without definitive etiologic yield: a prospective observational study (BMC Pediatr 14:40) Thomaidis L, Zantopoulos GZ, Fouzas S, Mantagou L, Bakoula C, Konstantopoulos A, 2014. Original paper (free, read)
Understanding basic concepts of developmental diagnosis in children (Transl Pediatr 9 Suppl 1:S9–S22) Brown NJ, Parikh C, Patel DR, 2020. Review article (free, read)
High threshold of total developmental quotient at 3 years for follow-up in extremely preterm infants (Early Hum Dev 196:106098) Maeda T, Tanahashi Y, Asada H, et al., 2024. Original paper (abstract)
Developmental Diagnosis: Normal and Abnormal Child Development Gesell A, Amatruda CS (Hoeber, New York), 1941. Original work (historical)

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Note

Calculation aid for healthcare professionals. Clinical assessment remains with the treating physician.

Review date of the German original: 2026-11-05 · Methodology

For parents (in German): Vaccination schedule (kinderarzt.net)

Frequently asked questions

Developmental quotient (DQ): What does this calculator compute?

Calculates the developmental quotient according to Gesell from the developmental age determined in a developmental test and the chronological (corrected for preterm infants) age, and classifies it according to the usual categories (≤ 70 marked delay, > 70 to < 85 borderline, ≥ 85 age-appropriate).

Developmental quotient (DQ): Which sources is this calculator based on?

Thomaidis L, Zantopoulos GZ, Fouzas S, Mantagou L, Bakoula C, Konstantopoulos A: Predictors of severity and outcome of global developmental delay without definitive etiologic yield: a prospective observational study (BMC Pediatr 14:40) (2014); Brown NJ, Parikh C, Patel DR: Understanding basic concepts of developmental diagnosis in children (Transl Pediatr 9 Suppl 1:S9–S22) (2020); Maeda T, Tanahashi Y, Asada H, et al.: High threshold of total developmental quotient at 3 years for follow-up in extremely preterm infants (Early Hum Dev 196:106098) (2024); Gesell A, Amatruda CS (Hoeber, New York): Developmental Diagnosis: Normal and Abnormal Child Development (1941)