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STROBE flow chart for sample derivation. Data from three cycles of NHANES, 2007–2008, 2009–2010, and 2011–2012, were concatenated into one analytic data file, NHNAES 2007–2012. The sample consisted of subjects with TSH concentration >0.4 mIU/L. Men whose intakes ≤500 kcal/day and ≥6000 kcal/day and women whose intakes ≤500 Kcal/day and ≥5000 kcal/day were considered outliers. Abbreviations: NHANES, National Health and Nutrition Examination Survey; TSH, thyroid-stimulating hormone.
