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Critical Care

Open Access

Do we spend less on older critically ill patients? Relationship among intensity of care, severity of illness and mortality

  • MD Rosa1,
  • AC Pecanha Antonio1,
  • M Mattioni1,
  • L Tagliari1,
  • F Schaich1,
  • J Maccari1,
  • R Oliveira1,
  • C Teixeira1,
  • TF Tonietto1 and
  • N Brandäo da Silva1
Critical Care201418(Suppl 1):P22

Published: 17 March 2014


The Therapeutic Intervention Scoring System (TISS-28) quantifies the type and number of intensive care treatments; therefore, it indicates the workload of ICU and may be used for calculating costs [1]. A previous cohort study [2] demonstrated that seriously ill older patients receive fewer invasive procedures and less resource-intensive hospital care, showing a preferential allocation of hospital services to younger patients regardless of severity of illness. The objective of this study is also to compare resource utilization across different ages of critically ill patients in an open model, mixed ICU.


During 7 years (2007 to 2013), TISS-28 was prospectively applied to all consecutive adult critically ill patients at 24 and 72 hours of ICU admission in a private hospital in Brazil. Demographic data, diagnoses on admission, comorbidities, ICU length of stay and mortality were recorded. Patients were stratified according to their ages.


TISS-28 scores at 24 and 72 hours of ICU admission were analyzed for 4,128 patients. Mean patient age was 68.3 (SD ± 17.6), 46.8% were female and 37% were surgically ill. The mean APACHE II score was 16 (SD ± 8) and 40% were submitted to mechanical ventilation at any time of the stay. Overall mortality was 14.4%. Neither APACHE II score adjusted for age nor TISS-28 in 24 and 72 hours of admission differs among age groups. However, mortality was significantly higher in patients aged 70 years or older (P < 0.001).


Mortality remained higher in older patients despite an absence of age-related differences in resource use at ICU. Comparing our results to a previous prospective cohort study [2], we emphasize the lower overall mortality of our population (14.4% vs. 50%). Limitations of our analysis include our unicenter design and lack of data for a closed model ICU.

Authors’ Affiliations

Hospital Moinhos de Vento, Porto Alegre, Brazil


  1. Cullen DJ, et al.: Therapeutic intervention scoring system: a method for quantitative comparison of patient care. Crit Care Med 1974, 2: 57-60. 10.1097/00003246-197403000-00001View ArticlePubMedGoogle Scholar
  2. Hamel MB, et al.: Seriously ill hospitalized adults: do we spend less on older patients? Support investigators. Study to understand prognoses and preference for outcomes and risks of treatments. J Am Geriatr Soc 1996, 44: 1043-1048.View ArticlePubMedGoogle Scholar


© Rosa et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.