Subclinical thyroid deficiency linked to poorer outcomes in children

Newborn screening for thyroid deficiency may be missing babies who would benefit from treatment, Australian research shows.

The study of more than half a million NSW children looked at the developmental and educational outcomes of babies whose thyroid stimulating hormone (TSH) levels were higher than normal on screening, but below the screening cut-off point at which they would be treated with thyroxine for congenital hypothyroidism.

Linking screening data with NAPLAN results from age seven through to 15, the researchers found poorer numeracy and literacy skills in children whose TSH levels