Thyroid function tests and their use by the general practitioner

We aimed to discover how thyroid function tests (TFTs) were used in general practice (GP) consultations. We would evaluate how many TFTs were requested, their efficiency, cost and their impact on referrals to endocrinology.This was a longitudinal, retrospective and observational study. SITE. At the Primary Care level, in the La Chana Health Centre, Granada.69 patients with possible Thyroid Disease, and who had a TFT performed by their GP, were surveyed. The test comprised parallel TSH, free T4 and free T3.2.46 TFTs per GP per year were requested. 14 showed positive (20.28%) and a definite diagnosis of Thyroid Function Disease (TFD) was made in 11 cases (15.94%). The cost per test was 1,718 pesetas; and per diagnosis, 8,467 pesetas. 78.26% of the cases were resolved by the GP without need of referral.The GPs carried out few FTFs; but those they did were very efficient. Cost was low and patients benefited from the fact that their GPs were able to use this technique. Endocrinology referrals were reasonable. All general practitioners should have use of TFTs.