Urinary iodine-to-creatinine ratio (UICR), a marker of low-iodine diet compliance, is not associated with radioactive iodine ablation (RAIA) success or disease recurrence/persistence at 12 months, regardless of whether patients are prepared with thyroid hormone withdrawal (THW) or recombinant human thyroid-stimulating hormone (rhTSH), according to results of a study published in the Journal of the Endocrine Society.