ค่าความดันโลหิตเฉลี่ยของหลอดเลือดแดง [ค่าล่าง] ของผู้ป่วย 13528 ในการมาโรงพยาบาลครั้งแรกโดยเฉลี่ยต่อเดือนเป็นเท่าใด? ไม่จำเป็นต้องใช้ตารางทั้งหมด
what is the monthly average of arterial bp [diastolic] for patient 13528 in the first hospital visit?It is not neccessary to use all the tables.
 admissions:  row_id [ number]  subject_id [ number]  hadm_id [ number]  admittime [ time]  dischtime [ time]  admission_type [ text]  admission_location [ text]  discharge_location [ text]  insurance [ text]  language [ text]  marital_status [ text]  ethnicity [ text]  age [ number] 
SELECT AVG(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 = 13528 AND NOT admissions.dischtime IS NULL ORDER BY admissions.admittime LIMIT 1)) AND chartevents.itemid IN (SELECT d_items.itemid FROM d_items WHERE d_items.label = 'arterial bp [diastolic]' AND d_items.linksto = 'chartevents') GROUP BY STRFTIME('%y-%m', chartevents.charttime)