Thyroid diseases are prevalent in Malaysia. A community health survey was undertaken to improve community awareness of the risks of common non-communicable diseases such as thyroid disorders and the benefits of screening for prevention and early detection of these conditions. Thyroid stimulating hormone (TSH) is the main biomarker and initial test for thyroid dysfunction. However, no formal reference interval (RI) data for TSH is available in Malaysia and South East Asia. All TSH reference inter...