Urine specific gravity and other urinary indices: inaccurate tests for dehydration.
OBJECTIVE: Urine output, specific gravity, and ketones (urinary indices) are commonly used as an objective means to assess for dehydration and gastroenteritis severity; however, their utility has not been established. The study was designed to evaluate the accuracy of urinary indices as diagnostic tests to identify acute dehydration. METHODS: We completed a prospective cohort study [...]