ค่าเฉลี่ยความดันโลหิตของผู้ป่วย 16169 มีการเปลี่ยนแปลงครั้งที่สองที่วัดในการนัดตรวจผู้ป่วยหนักครั้งแรก เทียบกับค่าที่วัดครั้งแรกในการนัดตรวจผู้ป่วยหนักครั้งแรก ไม่จำเป็นต้องใช้ตารางทั้งหมด
how much was patient 16169's arterial bp mean change second measured on the first intensive care unit visit compared to the value first measured on the first intensive care unit visit.It is not neccessary to use all the tables.
 d_icd_diagnoses:  row_id [ number]  icd9_code [ text]  short_title [ text]  long_title [ text] 
SELECT (SELECT chartevents.valuenum FROM chartevents WHERE chartevents.icustay_id IN (SELECT icustays.icustay_id FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 16169) AND NOT icustays.outtime IS NULL ORDER BY icustays.intime LIMIT 1) AND chartevents.itemid IN (SELECT d_items.itemid FROM d_items WHERE d_items.label = 'arterial bp mean' AND d_items.linksto = 'chartevents') ORDER BY chartevents.charttime LIMIT 1 OFFSET 1) - (SELECT chartevents.valuenum FROM chartevents WHERE chartevents.icustay_id IN (SELECT icustays.icustay_id FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 16169) AND NOT icustays.outtime IS NULL ORDER BY icustays.intime LIMIT 1) AND chartevents.itemid IN (SELECT d_items.itemid FROM d_items WHERE d_items.label = 'arterial bp mean' AND d_items.linksto = 'chartevents') ORDER BY chartevents.charttime LIMIT 1)