Prevalence of iodine intake inadequacy in elderly Brazilian women. A cross-sectional study

Abstract

Background/Objectives: Inadequate iodine intake is still a problem in various regions of the world, and limited data exist regarding the ingestion of iodine in elderly people. We investigated the prevalence of iodine intake inadequacy in a group of elderly women living in a region of Brazil considered to be iodinesufficient. Design and setting: Cross-sectional study conducted in the public healthcare system of Bauru, São Paulo, Brazil. Methods: We evaluated 135 elderly women (average age of 68.2 years) who participated in a program of assistance to the elderly with respect to iodine intake through two 24-hour recalls using a nutritional computer program. The women were also evaluated with respect to serum levels of free thyroxin (FT4) and thyrotropin (TSH) and were classified as euthyroid, hypothyroid or hyperthyroid. Results: The average iodine intake of the group was 100.7 ± 39.2 μg. Twenty-nine patients (21.5%) presented thyroid dysfunction: 27 (20%) had hypothyroidism, and two (1.5%) had hyperthyroidism. The average iodine intake of the patients with hypothyroidism and euthyroidism was 92.7 μg and 101.7 μg, respectively. The prevalence of iodine intake inadequacy, considering the co-variables of age, race, income, body mass index, TSH, FT4 and arterial hypertension, was 51%, 48% and 66% in the general, euthyroid and hypothyroid patients, respectively. Conclusion: We concluded that high prevalence of iodine intake inadequacy was present in this group of elderly women living in a region of Brazil considered to be iodine-sufficient.

Dietary iodine exposure and brain structures and cognition in older people. Exploratory analysis in the Lothian Birth Cohort 1936

“…Nevertheless, by analysing only the subsample indicative of a stable trait on iodine consumption, this study partly overcomes the measurement error resulting from self-rated dietary information known to be sub-optimally associated with iodine sufficiency. The cohort reported rather homogeneous, high iodine intake compared to that of younger British women (6), and contemporaries in Brazil (21).…”

“…While the critical role of nutrition is becoming better understood at important developmental stages, limited data exist on iodine intake in the elderly (21), and much less is known regarding its impact throughout the lifespan. With the assumption that extreme, or very specific, consumption patterns are likely to remain relatively stable throughout life; that is, that dairy or fish avoiders in later life will have been likely to have acquired such specific dietary habits earlier in life, we identified four groups with contrasting intake of iodine-rich products in a well characterised large birth cohort of elderly adults.…”

Avaliação do estado nutricional de iodo da população de um município de pequeno porte

“…12 No Brasil, a maior parte dos estudos sobre esse tema foi conduzida em diferentes municípios e estados brasileiros e avaliou o estado nutricional de iodo de escolares [13][14][15] bem como a relação dos estados nutricionais de iodo encontrados nessa população com teor de iodo no sal consumido. [16][17][18] Ainda há poucos estudos brasileiros sobre o estado nutricional de iodo de gestantes e lactantes [19][20][21][22][23] , adultos e idosos [24][25][26][27] , bem como a relação dos estados nutricionais de iodo desses diferentes grupos populacionais com fatores socioeconômicos, localização do domicílio (zona urbana ou rural), classificação étnico-racial, estado nutricional (de acordo com índice de massa corporal), tabagismo, e consumo de alimentos bociogênicos. Visto isso, a realização de trabalhos como esse visa contribuir para melhor caracterização do estado de iodo de uma população em diferentes estágios de vida e colaborar no planejamento de ações em saúde pública que objetivem a prevenção, controle e/ou reversão dos DDI.…”