A 10-Year Impact Evaluation of the Universal Salt Iodization (USI) Intervention in Sarawak, Malaysia, 2008–2018
2022
Lim Kuang Kuay | Noor Ani Ahmad | Tan Beng Chin | Chan Ying Ying | Maznieda Mahjom | S. Maria Awaluddin | Noor Syaqilah Shawaluddin | Tuan Mohd Amin Tuan Lah | Tahir Aris
A universal salt iodization (USI) was introduced in Sarawak, Malaysia in 2008 to control the iodine deficiency disorders (IDD) among its population. The purpose of this study is to evaluate the impact of the USI among school children in Sarawak after 10 years of implementation. The data were extracted from 2008 and 2018 Sarawak state-wide IDD surveys. Briefly, both surveys were cross-sectional surveys covering information on the socio-demographic, status of goitre, urinary iodine, and the amount of iodine in the salt samples. A total of 1104 and 988 between the ages of 8 and 10 were involved in the 2008 and 2018 surveys, respectively. The overall prevalence of goitre among the school children in Sarawak was significantly lower in 2018 (0.1%) compared to 2008 (2.9%). The median urinary iodine concentration (UIC) in urine samples had risen significantly from 102.1 µ:g/L in 2008 to 126.0 µ:g/L in 2018. In terms of iodine content in salt samples, the median concentration improved significantly in 2018 (35.5 µ:g/L) compared to 2008 (14.7 µ:g/L). After 10 years of USI implementation in Sarawak, the results from both surveys confirmed the effectiveness of mandatory USI in increasing the nutritional iodine status of school children in Sarawak.
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