Screening for congenital hypothyroidism: a three year experience

Area of Science:

• Pediatrics
• Endocrinology
• Public Health

Background:

• Congenital hypothyroidism (CH) is a common endocrine disorder in newborns.
• Early detection and treatment are crucial to prevent cognitive impairment.

Purpose of the Study:

• To report the experience of a nationwide screening program for CH in New Zealand.
• To determine the incidence of CH and the effectiveness of early treatment initiation.

Main Methods:

• Radio-immune assays for thyroxine (T4) were performed on all newborn blood samples.
• Thyroid stimulating hormone (TSH) tests were conducted on samples with T4 levels below the 5th percentile.
• A total of 160,899 infants were screened.

Main Results:

• 33 cases of primary CH were detected, yielding an incidence of 1:4875.
• The screening program enabled treatment to commence within the first three weeks of life for detected cases.

Conclusions:

• The nationwide screening program in New Zealand is effective in identifying infants with CH.
• Early diagnosis and treatment initiation are achievable through this screening approach.