Sk. Katusic et al., Incidence of reading disability in a population-based birth cohort, 1976-1982, Rochester, Minn, MAYO CLIN P, 76(11), 2001, pp. 1081-1092
Citations number
41
Categorie Soggetti
General & Internal Medicine","Medical Research General Topics
Objective: To report the incidence of reading disability among school-aged
children.
Subjects and Methods: In this population-based, retrospective birth cohort
study, subjects included all 5718 children born between 1976 and 1982 who r
emained in Rochester, Minn, after the age of 5 years. Based on records from
all public and nonpublic schools, medical facilities, and private tutorial
services and on results of all individually administered IQ and achievemen
t tests, extensive medical, educational, and socioeconomic information were
abstracted. Reading disability was established with use of research criter
ia based on 4 formulas (2 regression-based discrepancy, 1 non-regression-ba
sed discrepancy, and 1 low achievement).
Results: Cumulative incidence rates of reading disability varied from 5.3%
to 11.8% depending on the formula used. Boys were 2 to 3 times more likely
to be affected than girls, regardless of the identification methods applied
.
Conclusions: In this population-based birth cohort, reading disability was
common among school-aged children and significantly more frequent among boy
s than girls, regardless of definition.