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Objective
We assessed the commutativity of Roche and Abbott thyroid assays in the diagnosis and management of subclinical hypothyroidism (SCH). The Roche and Abbott thyroid assays are used by approximately 75% of clinical laboratories in the UK.
Method
Consecutive samples received from primary care on patients with SCH who had a raised thyroid‐stimulating hormone (TSH) <10 mIU/L and a normal...