Surgical Site Infection Risk Index of Neumayer et al Based on Data from the Patient Safety in Surgery Study and National Surgical Quality Improvement Program

type of operation

stomach or intestines

2

aneurysm or blood vessel repair

1

thoracoabdominal aneurysm

1

skin or musculoskeletal

2

respiratory

1

oral surgery; mouth or palate

0

hernia or endocrine

1

relative value units for operation

> 17

4

10 to 17

2

< 10

0

type of wound

contaminated or infected

2

clean/contaminated

1

clean

0

ASA class

1

0

2 to 5

2

time of operation

emergency

2

other

0

diabetes

absent

0

present

1

smoker

no

0

yes

1

dyspnea

absent

0

present

1

steroid use

no

0

yes

1

serum albumin

<= 3.5 g/dL

1

> 3.5 g/dL

0

age of the patient

< 40 years of age

0

>= 40 years of age

1

total serum bilirubin

<= 1 mg/dL

0

> 1 mg/dL

1

radiotherapy within last 3 months

no

0

yes

1

number of alcoholic drinks per day

<= 2

0

> 2

1

1 or 2

< 1%

3 or 4

1.0%

5 or 6

1.5 to 2%

7 or 8

3.0 to 4%

9

4.4%

10

6.6%

11

8.8%

12 or 13

10 to 11%

14 or 15

12.5%

16

15%