SAPS III: Simplified acute physiology score 3
The Simplified Acute Physiology Score III (SAPS 3) is an ICU scoring system and is used to predict the mortality risk for patients presenting at the ICU.
Research authors: Philipp G.H. Metnitz, Rui P. Moreno, Eduardo Almeida, Barbara Jordan, Peter Bauer, Ricardo Abizanda Campos, Gaetano Iapichino, David Edbrooke, Maurizia Capuzzo, Jean-Roger Le Gall, on behalf of the SAPS 3 investigators
Details Formula Study characteristics Files & References
Model author
Model ID
Revision date
MeSH terms
  • Intensive Care Unit
  • Model type
    Custom model (Conditional)
    Condition Formula

    Additional information

    A total of 22,791 admissions were recorded in the 309 participating ICUs during the study period. For patients who were admitted more than once (n=1,455), only the first admission was included, giving 21,336 admitted patients. Patients who were <16 years of age (n=628), those without ICU admission or discharge data (n=1,074), and those with records that lacked an entry in the field “ICU outcome” (n=57) were excluded. The Basic SAPS 3 Cohort thus comprises 19,577 patients from 307 ICUs.

    For the development of a predictive model for hospital mortality as outcome, patients with a missing entry in the field of “vital status at hospital discharge” (n=2,540) or an entry of “still in the hospital” at the end of the follow-up period (n=253) were further excluded. The SAPS 3 Hospital Outcome Cohort thus comprises 16,784 patients from 303 ICUs.

    Study Population

    Total population size: 19559
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    Females: {{ model.numberOfFemales }}

    Continuous characteristics

    Name LL Q1 Median Q3 UL Unit
    Age 49 63 74 years
    ICU Length of Stay 1 2 6 days
    SAPS II score 20 30 42 score
    SOFA score 6 9 11 score

    Categorical characteristics

    Name Subset / Group Nr. of patients
    Origin Home 2810
    Same hospital 13926
    Chronic care facility 74
    Public place 519
    Other hospital 2125
    Other 80
    Missing 43
    Intra-hospital location before ICU admission Operating room 7537
    Other 552
    Other ICU 698
    Recovery room 482
    Ward 3411
    Missing 916
    Emergency room 5419
    Intermediate care unit/ high dependency unit 562
    ICU admission status Planned admission 6750
    Unplanned admission 12338
    Missing 489
    Acute infection at ICU admission No infection 15254
    Clinically improbable/colonization 342
    Clinically probable/documented 2761
    Microbiologically documented 1206
    Missing 13
    Surgical status No surgical procedure 8437
    Scheduled surgery 6800
    Emergency surgery 3321
    Missing 1019
    ICU discharge - destination Home 438
    Same hospital 14946
    Other hospital 1029
    Missing 3164
    Intrahospital discharge IMCU/HDU 2222
    Other 303
    Other ICU 583
    Recovery room 306
    Ward 12250
    Missing 3855
    ICU discharge - status Planned discharge 14872
    Unplanned discharge 1595
    Missing 3110
    Outcome ICU mortality (%) 15.2
    SAPS III: Simplified acute physiology score 3
    Refer to Intended Use for instructions before use
    Evidencio B.V., Irenesingel 19, 7481 GJ, Haaksbergen, the Netherlands

    The predicted mortality risk in the ICU is:

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    Notes are only visible in the result download and will not be saved by Evidencio

    The predicted mortality risk in the ICU is: %

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    Outcome stratification

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    Conditional information

    Result interpretation

    The SAPS 3 is an externally validated tool that accurately predicts ICU mortality. The score was evaluated and compared with the APACHE II and the SAPS 2. The performance of the SAPS 3 was similar to that of the APACHE II and the SAPSII
    Discrimination of the SAPS 3 model showed c-statistics up to 0.89. The C-SAPS 3 score appeared to have the best calibration curve on visual inspection.

    Y Sakr, C. Krauss, ACKB Amaral, et al. Comparison of the performance of SAPS II, SAPS 3, APACHE II, and their customized prognostic models in a surgical intensive care unit, BJA: British Journal of Anaesthesia, Volume 101, Issue 6, 1 December 2008, Pages 798–803

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    Calculations alone should never dictate patient care, and are no substitute for professional judgement. See our full disclaimer.

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