STUDY, LONGITUDINAL


Meaning of STUDY, LONGITUDINAL in English

A study done over the passage of time. For example, a longitudinal study of children with Down syndrome (trisomy 21) might involve the study of 100 children with this condition from birth to 10 years of age. Also called a diachronic study. The opposite of a cross-sectional (synchronic) study.

English dictionary of medicine.      Английский словарь медицины.