Impact evaluation of efforts to eliminate iodine deficiency disorders in Nigeria.

Objective: : The objective of the present review is to assess the impact of universal salt iodisation in Nigeria during the last five years, with reference to some of the sentinel sites studied previously during a 1995 multi-centre study.

Design, Setting And Subjects: : The method of goitre classification by palpation was employed using the new internationally accepted method in which the classification is simply graded as 0, 1 or 2. The multistage random sampling method was used and states and local government areas were already selected by virtue of their known status for iodine deficiency disorders (IDD).