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Congenital hypothyroidism in Sweden. Incidence and age at diagnosis
Insights
Congenital hypothyroidism affects 1 in 6900 Swedish newborns. Despite healthcare, diagnosis is often delayed past three months, highlighting the need for newborn screening in Sweden.
Area of Science:
- Pediatrics
- Endocrinology
- Public Health
Background:
- Congenital hypothyroidism (CH) is a condition present at birth that can lead to developmental issues if untreated.
- Early diagnosis and treatment are crucial for optimal outcomes in affected infants.
Purpose of the Study:
- To determine the incidence of congenital hypothyroidism in Sweden between 1969 and 1975.
- To assess the timeliness of diagnosis within the existing Swedish healthcare system.
- To advocate for the implementation of newborn screening for CH in Sweden.
Main Methods:
- Retrospective analysis of 112 diagnosed cases of congenital hypothyroidism in Swedish children's hospitals and pediatric wards from 1969-1975.
- Calculation of incidence based on the total number of diagnosed cases and live births during the study period.
- Evaluation of diagnostic delays by comparing diagnosis age to the study period.
Main Results:
- The incidence of congenital hypothyroidism in Sweden was found to be approximately 1:6900 live births.
- A significant delay in diagnosis was observed, with 52% of cases diagnosed after three months of age.
- Despite an efficient national healthcare program, diagnostic delays persisted.
Conclusions:
- The calculated incidence of congenital hypothyroidism in Sweden underscores the importance of early detection.
- Delayed diagnoses in over half of the cases suggest limitations in the existing infant healthcare program for identifying CH.
- The findings strongly support the introduction of a mass newborn screening program for congenital hypothyroidism in Sweden to improve infant outcomes.
Abstract:
A total number of 112 children with congenital hypothyroidism were diagnosed in all Children's Hospitals and Pediatric Wards in Sweden during the 7-year period 1969-1975. Since it may be assumed that all cases of congenital hypothyroidism, which were diagnosed during that period were seen in one of these hospitals, the incidence of congenital hypothyroidism in Sweden can be calculated to be 1:6900 live births. In spite of an efficient National Health Care Program for infants the diagnosis was delayed until after an age of three months in 52% of the cases. This fact supports the view that mass screening of newborns for congenital hypothyroidism has to be introduced in Sweden. However, the beneficial effects of such a program cannot be fully elucidated until it has been considered whether earlier instituted treatment would have improved the outcome of children in whom a diagnosis was made after 3 months of age.