instruction: how much changes in the weight of patient 006-181433 last measured on the current hospital visit compared to the first value measured on the current hospital visit?
response: SELECT (SELECT patient.admissionweight FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '006-181433' AND patient.hospitaldischargetime IS NULL) AND NOT patient.admissionweight IS NULL ORDER BY patient.unitadmittime DESC LIMIT 1) - (SELECT patient.admissionweight FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '006-181433' AND patient.hospitaldischargetime IS NULL) AND NOT patient.admissionweight IS NULL ORDER BY patient.unitadmittime LIMIT 1)