Skip to main content

Does SOFA and TISS scores correlate in long term ICU patients?


SOFA score is a useful tool for monitoring of organ function in ICU patients [1]. TISS score is used for measuring of workload in intensive care [2]. We studied if there is any link between SOFA and TISS scores in long term ICU patients (i.e. patients staying in the ICU >3 days).

Materials and methods

Daily SOFA and TISS scores of ICU patients admitted between July and November 1998 who stayed in the ICU >3 days were retrieved from data collection system. An experienced ICU doctor has collected SOFA scores into this system daily. Pooled scores for the whole group, for ICU survivals (S) and nonsurvivals (NS) separately and the scores on the first day of ICU stay were analysed.


Sixty-two patients (i.e. 42% out of total admissions; age 60.0 ± 14.7 years) fulfilled the inclusion criteria and stayed in the ICU for the mean of 11.9 ± 10.8 days). ICU mortality was 30.6% (19 patients). Significant correlation was found for pooled SOFA and TISS scores (r2 = 0.52, P < 0.0001) and it was more pronounced in survivals (S) than in nonsurvivals (NS) (r2=0.52, P < 0.0001 and r 2=0.19, P < 0.000l, respectively). Significant link between the two scores was already present on the first day of ICU stay (r 2=0.54, P < 0.0001).


In long term ICU patients a significant correlation is present between organ failures (scored by SOFA) and workload (measured by TISS). This link is already present on the day of admission and later on is more pronounced in survivals possibly because in NS the care is more often witheld or withdrawn.


  1. Vincent JL, et al.: Use of the SOFA score to assess the incidence of organ dysfunction/failure in the intensive care units: Results of a multicenter, prospective study. Crit Care Med 1998, 26: 1793.

    Article  CAS  PubMed  Google Scholar 

  2. Dickie H, et al.: Relationship between TISS and ICU cost. Intensive Care Med 1998, 24: 1009-1017. 10.1007/s001340050709

    Article  CAS  PubMed  Google Scholar 

Download references

Author information

Authors and Affiliations


Rights and permissions

Reprints and Permissions

About this article

Cite this article

Novak, I., Hora, P., Bilek, M. et al. Does SOFA and TISS scores correlate in long term ICU patients?. Crit Care 3 (Suppl 1), P256 (2000).

Download citation

  • Published:

  • DOI: