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Morbid obesity is an independent determinant of death among surgical critically ill patients.

Abstract：

OBJECTIVE:To determine whether extreme obesity (morbid obesity; body mass index > or =40 kg/m(2)) is an independent risk factor for death among critically ill patients; this objective is most salient in the subset of patients who sustain a prolonged intensive care unit stay during which the burdens of care imposed by obesity and its consequences would become most apparent. DESIGN:Cohort analysis of data from the Project Impact database used to catalog admissions and outcomes to a surgical intensive care unit, with predetermined end point analyses of outcomes. SETTING:Surgical intensive care unit serving Tufts-New England Medical Center, a tertiary care and university medical center in Boston. PATIENTS:All critically ill surgical patients admitted to the Tufts-New England Medical Center surgical intensive care unit from January 1998 to March 2001. INTERVENTIONS:Intensive care unit and hospital mortality and lengths of stay were compared with body mass index subclassified into five groups: underweight, normal weight, overweight, obese, and extremely obese. Data were examined for all admissions during the study period and for a predetermined subgroup with a prolonged intensive care unit stay (> or =4 days). MEASUREMENTS AND MAIN RESULTS:The prevalence of obesity in the surgical intensive care unit was 26.7%; extreme obesity was observed in 6.8%. In the full cohort of patients (n = 1373), median length of stay was short (2 days) and there were no differences in mortality in patients among any of the body mass index classes. In the subgroup of prolonged stay patients (n = 406), intensive care unit and hospital mortality rates were significantly increased in extremely obese patients compared with all other patients (intensive care unit, 33.3% vs. 12.3%, p = .009; hospital, 33.3% vs. 16%, p = .045). Multivariate analysis showed that extreme obesity was an independent predictor of death in surgical critically ill patients with prolonged intensive care unit stay after controlling for age, gender, and severity of illness. The odds of death increased 7.4 times in patients with morbid obesity. CONCLUSIONS:Morbid obesity (body mass index > or =40 kg/m(2)) is an independent risk factor for death in surgical patients with catastrophic illness requiring prolonged intensive care. The prevalence of obesity is growing, both in the intensive care unit and in the general population. The increased risk of complications and death in this population mandates that we adapt customized processes of care to specifically address this unique and very challenging subset of patients.

journal_name

Crit Care Med

journal_title

Critical care medicine

authors

Nasraway SA Jr,Albert M,Donnelly AM,Ruthazer R,Shikora SA,Saltzman E

doi

10.1097/01.CCM.0000205758.18891.70

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

964-70; quiz 971

issue

eissn

0090-3493

issn

1530-0293

journal_volume

pub_type

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Morbid obesity is an independent determinant of death among surgical critically ill patients.