instruction: how many hours has passed since patient 99883 last stayed on the current hospital visit in ward 57?
response: SELECT 24 * (STRFTIME('%j', CURRENT_TIME()) - STRFTIME('%j', transfers.intime)) FROM transfers WHERE transfers.icustay_id IN (SELECT icustays.icustay_id FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 99883 AND admissions.dischtime IS NULL)) AND transfers.wardid = 57 ORDER BY transfers.intime DESC LIMIT 1