Abstract
OBJECTIVE: To evaluate the hypotheses that 24-hour urine output volume would be associated with (a) cognitive evaluations of unflavored water and (b) urges to drink. METHODS: Patients (N = 380, 60% female) with a history of kidney stones completed a baseline questionnaire and a 24-hour urine collection. RESULTS: Non-thirst-related urges to drink unflavored water were positively associated with daily urine volume (b = 0.15, P <.01), but non-thirst-related urges to drink flavored drinks were not associated with daily urine volume. Cognitive evaluations of unflavored water were not associated with daily urine volume. CONCLUSION: These findings highlight the importance of affective over cognitive processes for motivating non-thirst-related fluid intake. Non-thirst-related urges to drink unflavored water are a potential target for promoting urine output in patients at risk for kidney stone recurrence and may be potentially used to identify those patients at higher risk in absence of a 24-hour urine volume.