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[Intellectual development of phenylketonuria children treated early--a longitudinal study. 10 years' concomitant
F M Slijper1, J Huisman, M M Hendrikx
1Abteilung Kinderpsychiatrie, Sophia Kinder Ziekenhuis, Rotterdam.
Insights
Early screening for phenylketonuria (PKU) in newborns leads to normal intellectual functioning in treated children. This study found no significant differences compared to healthy peers, supporting continued newborn screening programs.
Area of Science:
- Medical Genetics
- Developmental Pediatrics
- Public Health Screening
Context:
- Newborn screening for phenylketonuria (PKU) has been nearly universal in The Netherlands since September 1, 1974.
- This study analyzes data from 69 PKU patients treated early, focusing on intellectual development.
- Psychological assessments were conducted at multiple key developmental ages (1, 2, 4.6, and 6.6 years).
Purpose:
- To evaluate the intellectual functioning of children diagnosed and treated early for phenylketonuria (PKU).
- To assess long-term intellectual outcomes in a cohort of PKU patients.
- To determine if early intervention impacts cognitive development compared to healthy controls.
Summary:
- Psychological testing revealed no significant differences in intellectual levels between early-treated PKU patients and healthy children at any assessed age.
- No sex-based differences in intellectual development were observed at ages 1 and 2 years.
- The longitudinal intellectual development of these PKU patients remained stable during the first four and a half years of life.
Impact:
- Provides evidence supporting the efficacy of early newborn screening and treatment for phenylketonuria (PKU).
- Highlights the importance of continued psychosocial data collection alongside screening for comprehensive patient monitoring.
- Informs public health policy regarding the necessity and benefits of universal newborn screening programs for metabolic disorders.
Abstract:
Since 1st September 1974 almost all newborns in The Netherlands have been screened for phenylketonuria (PKU). Data collected between then and 1 October 1984 are presented, with respect to the intellectual functioning of 69 patients who received early treatment for PKU. Wherever possible, psychological testing was carried out at four key ages, namely 1.0 years, 2.0 years, 4.6 years, 6.6 years. The results of the tests revealed no differences in the mental levels of these patients and healthy children at any of the key ages. Also no sex differences at key ages 1 and 2 years related to this variable were found. The longitudinal course of the intellectual development in the first four and a half years was stable. The necessity for the continuation of screening and the collection of psychosocial data is discussed.