###HUMAN: what's the number of hours that have passed since patient 013-38992 first stayed in ward 561 during this hospital visit?, ###ASSISTANT: SELECT 24 * (STRFTIME('%j', CURRENT_TIME()) - STRFTIME('%j', patient.unitadmittime)) FROM patient WHERE patient.uniquepid = '013-38992' AND patient.wardid = 561 AND patient.hospitaldischargetime IS NULL ORDER BY patient.unitadmittime LIMIT 1