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Medicina crítica (Colegio Mexicano de Medicina Crítica)

versión impresa ISSN 2448-8909


REYES HUIDOBRO, Magdalena Judith et al. The body mass index as a predictor of morbimortality and resource use in the patients in the intensive care unit. Med. crít. (Col. Mex. Med. Crít.) [online]. 2017, vol.31, n.1, pp.25-30. ISSN 2448-8909.


There is disagreement over if a body mass index (BMI) above 25 kg/m(2) increases, decreases or does not alter the mortality in critically ill patients.


To compare the mortality, morbidity and resource use among patients with normal or low body mass index (< 25 kg/m(2)) versus patients with overweight or obesity (> 25 kg/m(2)).


Study of a prolective cohort in an intensive care unit.


One hundred fifty-nine patients were included in the study.


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.


When we compared patients with a BMI < 25 kg/m(2) versus those with BMI above 25 kg/m(2), we did not find statistical differences in mortality and resource use. However, when we changed the cutoff point of BMI to 30 kg/m(2), we found statistically significant differences in mortality and an important effect size in the resource use between both groups.


In México we should change the cutoff point of the body mass index to 30 kg/m(2) 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.

Palabras llave : Body mass index; intensive care unit; mortality; resource use.

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