Impact of Genetic potential and prematurity on growth outcomes.

PURPOSE: To explore the relationship between genetic potential and catch-up growth in school-age children who were born prematurely. STUDY DESIGN AND METHOD: This descriptive correlational study compared three groups of children who were born prematurely, sorted by birthweight groups into low, very low, and extremely low birthweight on measures of catch-up growth and body composition at school age (n = 45). Height and weight were compared to established norms for children of normal birthweight. Growth at school age and parental heights were also correlated. RESULTS: Children in all birthweight groups achieved growth within normal ranges (two standard deviations from the mean) by school age. The growth of the extremely low birthweight group was in the lower range of normal. Maternal height was the best predictor of children's heights at 8 to 10 years of age. CLINICAL IMPLICATIONS: Parents and providers can be reassured that many children overcome the adverse effects of prematurity on childhood growth. Throughout childhood, growth should be closely monitored using appropriate grids, and correcting for prematurity.