Table 1 Summary of previous indexes predicting risk of death following surgery

P-POSSUM[6]

General surgical patients (2500/7500)

Age, cardiac history, respiratory history, blood pressure, pulse rate, Glascow Coma Score, labs (hemoglobin, WBC, urea, Na+, K+, ECG); operative severity, mulitple procedures, total blood loss, peritoneal soiling, presence of malignancy, mode of surgery

-

SRS[5]

Patients of three general surgeons (3144/2780)

CEPOD classification; BUPA operative grade; ASA score

0.95 (0.93, 0.97)[5]

Cr-POSSUM[1]

Patients having emergency or elective colorectal surgery (4079/2691)

Age; cardiac failure; SBP; pulse; urea; haemoglobin; operative severity; peritoneal soiling; operative urgency; cancer staging

0.90 (0.88, 0.92)[1]

Nottingham[3]

65+ years, acute or elective surgical and acute urological patients undergoing operative or conservative treatment (2923/1362)

Age; white cell count; urea; pulse rate; mean systolic and diastolic blood pressure; emergency admission; emergency operation; major operation; vascular disease; malignant disease; conservative treatment

0.86 (0.82, 0.89)[3]

AFC[25, 26]

Undergoing open or laparoscopic surgery for colorectal cancers or diverticular disease (1421/395)

Emergency surgery (surgery withing 24 hours of admission); weight loss > 10% within past 6 months; neurological disease history; age > 70 years

0.89[4]

E-POSSUM[2]

65+ years; undergoing first colorectal operation or early colorectal reoperation (791/395)

Age group (WHO classification); physiological score (cardiac history, respiratory history, blood pressure, pulse rate, Glascow Coma Score, haemoglobin level, white cell count, urea concentration, Na+ level, K+ level, electrocardiography); operative severity score (operative severity, mulitple procedures, total blood loss, peritoneal soiling, presence of malignancy, mode of surgery)

0.86 (0.81, 0.92)[2]