Salt intake and iodine status of women in Samoa.

The objective of this study was to determine iodine nutrition status and whether iodine status differs across salt intake levels among a sample of women aged 18-45 years living in Samoa. A cross-sectional survey was completed and 24-hr urine samples were collected and assessed for iodine (n=152) and salt excretion (n=119). The median urinary iodine concentration (UIC) among the women was 88 μg/L (Interquartile range (IQR)=54-121 μg/L). 62% of the women had a UIC <100 μg/L. The crude estimated mean 24-hr urinary salt excretion was 6.6 (standard deviation 3.2) g/day. More than two-thirds (66%) of the women exceeded the World Health Organization recommended maximum level of 5 g/day. No association was found between median UIC and salt excretion (81 μg/L iodine where urinary salt excretion >=5 g/day versus 76 μg/L where urinary salt excretion <5 g/day; p=0.4). Iodine nutrition appears to be insufficient in this population and may be indicative of iodine deficiency disorders in Samoan women. A collaborative approach in monitoring iodine status and salt intake will strengthen both programs and greatly inform the level of iodine fortification required to ensure optimal iodine intake as population salt reduction programs take effect.

[1]  K. Charlton,et al.  Iodine status similarly suboptimal in Australian women who have desirable salt intakes compared to those with excessive intakes. , 2014, Nutrition.

[2]  K. Charlton,et al.  A lowered salt intake does not compromise iodine status in Cape Town, South Africa, where salt iodization is mandatory. , 2013, Nutrition.

[3]  F. Cappuccio,et al.  Need for coordinated programs to improve global health by optimizing salt and iodine intake. , 2012, Revista panamericana de salud publica = Pan American journal of public health.

[4]  Martin McKee,et al.  UN High-Level Meeting on Non-Communicable Diseases: addressing four questions , 2011, The Lancet.

[5]  S. Goldman,et al.  Seasons but not ethnicity influence urinary iodine concentrations in Belgian adults , 2011, European journal of nutrition.

[6]  Robert L. Jones,et al.  Iodine status of the U.S. population, National Health and Nutrition Examination Survey, 2005–2006 and 2007–2008. , 2011, Thyroid : official journal of the American Thyroid Association.

[7]  T. Remer,et al.  Higher urine volume results in additional renal iodine loss. , 2010, Thyroid : official journal of the American Thyroid Association.

[8]  K. Charlton,et al.  Poor iodine status and knowledge related to iodine on the eve of mandatory iodine fortification in Australia. , 2010, Asia Pacific journal of clinical nutrition.

[9]  K. Byth,et al.  Iodine nutritional status of children on the island of Tanna, Republic of Vanuatu , 2009, Public Health Nutrition.

[10]  Ian J. Brown,et al.  Salt intakes around the world: implications for public health. , 2009, International journal of epidemiology.

[11]  C. Pandav,et al.  Iodine-deficiency disorders , 2008, The Lancet.

[12]  T. Jørgensen,et al.  Iodine intake before and after mandatory iodization in Denmark: results from the Danish Investigation of Iodine Intake and Thyroid Diseases (DanThyr) study , 2008, British Journal of Nutrition.

[13]  C. Hawkes.  WHO Commission on Social Determinants of Health Globalization , Food and Nutrition Transitions Globalization Knowledge Network , 2008 .

[14]  P. Laurberg,et al.  Reliability of studies of iodine intake and recommendations for number of samples in groups and in individuals , 2007, British Journal of Nutrition.

[15]  S. McGarvey,et al.  Health Change in the Asia-Pacific Region: Nutrition and health in modernizing Samoans: temporal trends and adaptive perspectives , 2007 .

[16]  M. Zimmermann.  Key Barriers to Global Iodine Deficiency Disorder Control : A Summary , 2007 .

[17]  Shoma Berkemeyer,et al.  Longitudinal examination of 24-h urinary iodine excretion in schoolchildren as a sensitive, hydration status-independent research tool for studying iodine status. , 2006, The American journal of clinical nutrition.

[18]  J. Schultz.  Globalization, urbanization and nutrition transition in a developing island country: a case study in Fiji , 2004 .

[19]  C. Als,et al.  Swiss pilot study of individual seasonal fluctuations of urinary iodine concentration over two years: is age-dependency linked to the major source of dietary iodine? , 2003, European Journal of Clinical Nutrition.

[20]  F. Fordyce,et al.  Database of the iodine content of food and diets populated with data from published literature. (CR/03/084N). , 2003 .

[21]  C. Als,et al.  Age- and gender-dependent urinary iodine concentrations in an area-covering population sample from the Bernese region in Switzerland. , 2000, European journal of endocrinology.

[22]  A. Helbling,et al.  Urinary iodine concentration follows a circadian rhythm: a study with 3023 spot urine samples in adults and children. , 2000, The Journal of clinical endocrinology and metabolism.

[23]  C. Pandav,et al.  Simple microplate method for determination of urinary iodine. , 2000, Clinical chemistry.

[24]  L. Ovesen,et al.  Day-to-day and within-day variation in urinary iodine excretion , 1999, European Journal of Clinical Nutrition.

[25]  D. Galanis,et al.  Dietary intake of modernizing Samoans: implications for risk of cardiovascular disease. , 1999, Journal of the American Dietetic Association.

[26]  L. Braverman,et al.  Ammonium persulfate: a new and safe method for measuring urinary iodine by ammonium persulfate oxidation. , 2009, Experimental and clinical endocrinology & diabetes : official journal, German Society of Endocrinology [and] German Diabetes Association.

[27]  J. Dunn.  Seven deadly sins in confronting endemic iodine deficiency, and how to avoid them. , 1996, The Journal of clinical endocrinology and metabolism.

[28]  M. Born,et al.  A metaanalysis of research on iodine and its relationship to cognitive development. , 1996 .

[29]  G. Delong,et al.  Timing of vulnerability of the brain to iodine deficiency in endemic cretinism. , 1994, The New England journal of medicine.

[30]  E. Haus,et al.  Circadian and seasonal variation in iodine excretion in children in an endemic goiter area. , 1990, Progress in clinical and biological research.

[31]  U. Kapil.  Iodine deficiency. , 1986, Indian pediatrics.

[32]  T. Findley,et al.  Studies in community nutrition: estimation of sodium output. , 1976, Preventive medicine.