[Hypothyroidism in adults in a basic health area]

The objective of the present study is to study the prevalence, as well as the clinical and epidemiological characteristics of hypothyroid disease in adults using the computerised clinical records.

Observational, descriptive and cross-sectional study. The target population was the patients of the health centres of Lucena I and II (Córdoba).

Patients 14 years or older, diagnosed with hypothyroidism, born and resident in Lucena. Two hundred and fourteen patients were recruited by random sampling, who then underwent a clinical interview using a questionnaire.

The mean age of the patients was 49.71 years (SD 17.03; 95% CI 47.34-51.98), with 85.5% women. A diagnosis of sub-clinical hypothyroidism was found in 74.8%, compared to 18.7% of primary hypothyroidism, and 6.5% of secondary hypothyroidism. The 53.7% (95% CI 46.81-60.59) of patients diagnosed with hypothyroidism did not have thyroid antibodies results. However, 75.2% (95% CI 68.89-80.86) were being treated with levothyroxine. The prevalence of hypothyroidism was 5.7% (95% CI 5.46-5.96).

Sub-clinical hypothyroidism is very common in Primary Care clinics. Many patients are not correctly diagnosed and many are over-medicated, suggesting a need to review the diagnosis.