title: Is the Amerlex free-thyroxine assay a useful screening test in the elderly?
abstract: The results of screening 1140 acutely-ill elderly patients with the Amersham Amerlex FT4 assay are presented. Nonthyroidal illness was the commonest cause of abnormal results and we stress the importance of performing confirmatory tests in this group of patients.
mesh_terms: D000368:Aged; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D013959:Thyroid Diseases / Q000175:diagnosis*; D013960:Thyroid Function Tests; D013974:Thyroxine / Q000097:blood
chemical_list: D013974:Thyroxine