African Surgical Outcome Study (ASOS) Surgical Risk Calculator

Kluyts et al reported the African Surgical Outcome Study (ASOS) Surgical Risk Calculator. This was developed at multiple hospitals across Africa.

Patient selection: age >= 18 years

Parameters:

(1) age in years

(2) ASA physical status

(3) surgical timing (acuity)

(4) surgical severity

(5) indications for surgery

(6) surgery type

Parameter	Finding	Points
age in years	18-29	0
	30-69	1
	>= 70	3
ASA	1	0
	2	2
	3	5
	4 or 5	8
surgical timing	elective	0
	urgent	3
	emergent	4
surgical severity	minor	0
	intermediate	2
	major	4
surgical indication	non-communicable disease	0
	Caesarean section	-2
	trauma	1
	infection	2
surgery type	OB/GYN	-1
	plastics, breast	1
	urology	2
	ENT, GI, hepatobiliary, vascular, cardiothoracic	3
	neurosurgery	4
	other	0

total score =

= SUM(points for all 6 parameters)

Interpretation:

• minimum score: -3

• maximum score: 25

Total Score	Percent Severe Complications
<= 3	1.2%
4, 5, 6	1.4%
7, 8, 9	4%
10, 11, 12	8%
13, 14, 15	18%
16, 17, 18	35%
>= 19	83%

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