2017, Number 1
The body mass index as a predictor of morbimortality and resource use in the patients in the intensive care unit
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ABSTRACTIntroduction: There is disagreement over if a body mass index (BMI) above 25 kg/m2 increases, decreases or does not alter the mortality in critically ill patients.
Objective: To compare the mortality, morbidity and resource use among patients with normal or low body mass index (‹ 25 kg/m2) versus patients with overweight or obesity (› 25 kg/m2).
Design: Study of a prolective cohort in an intensive care unit.
Patients: One hundred fifty-nine patients were included in the study.
Methods: Demographic and clinical data (including weight and height for the calculation of the body mass index) were collected, as well as scores of severity of illness SAPS-3, organic failure (Brussels) and therapeutic intervention NEMS (as a surrogate marker of resource use). The statistical analysis was multivariate, with a significance of p ‹ 0.05.
Results: When we compared patients with a BMI ‹ 25 kg/m2 versus those with BMI above 25 kg/m2, we did not find statistical differences in mortality and resource use. However, when we changed the cutoff point of BMI to 30 kg/m2, we found statistically significant differences in mortality and an important effect size in the resource use between both groups.
Conclusions: In México we should change the cutoff point of the body mass index to 30 kg/m2 when we compare mortality and resource use in those patients in the ICU. This study suggests the possibility of making a multicenter study to confirm these findings.
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