Relationship Between Filter Paper and Serum Thyroid Stimulating Hormone in Screening of Neonatal Hypothyroidism

Congenital hypothyroidism is more prevalent in Iran than other countries (1.2 - 2.4 in 1000 births compared with 1/2000-1/4000) [1]. In most countries, filter paper TSH is used for screening test. The cutoff point in Iran was defined as 5 mIU/L. Few studies investigated the relationship between filter paper TSH with serum TSH. Giving that screening is being performed in Markazi Province since 2006, the present study, investigates the relationship between filter paper and serum TSH in the screened neonates