SSIP Components

Age in years, at admission to critical care (ICU, HDU), is scored by decade.

Age in Years	Points
<30	0
31 - 39	0
40 - 49	1
50 - 59	1
60 - 69	2
70 - 79	2
80 +	3

The English 2015 index of multiple deprivation, the official measure of relative deprivation in England, consisting of income, employment, education, health, crime, barriers to housing services and living environment domains.

The English indices of deprivation measure relative deprivation in small areas in England called lower-layer super output areas. The index of multiple deprivation is the most widely used of these indices.

Use the regional socioeconomic status as a proxy for index of multiple deprivation 2015 in England.

IMD 2015	Points
1 (least deprived)	0
2	0
3	0
4	0
5 (most deprived)	1

The pre-index hospitalization dependency status is a subjective assessment of whether the participant receives

• no (none)
• some (moderate) or
• total (all)

assistance with activities of daily living such as bathing, dressing, going to the toilet, moving in/out of bed/chair, continence and eating, prior to ICU admission.

Pre-Admission Dependency	Points
None	0
Moderate	2
All	5

The number of comorbidities could be assessed using any of the commonly available scores (such as Charlson, Elixhauser, or APACHE II severe comorbidity).

Number of Comorbidities	Points
0	0
1	2
2	3
3	4
4+	5

This refers to the surgical status at the time of index sepsis admission.

Admission Type	Points
Elective Surgical	0
Emergency Surgical	1
Medical	2

Haemoglobin measured on the day of admission, with sepsis, to critical care.

g/dL	g/L	Points
> 11	> 110	0
9.1 - 11	91 - 110	0
7.1 - 9.0	71 - 90	1
≤ 7.0	≤ 70	2

Clinically defined site of infection.

Microbiological confirmation is not required for this variable.

Site of Infection	Points
Neurological	0
Respiratory	1
Cardiovascular	2
Gastrointestinal	1
Genitourinary	1
Musculoskeletal or Dermatological	0
Unknown	1