Abstract
No large observational study has compared the incidence and risk factors for extubation failure within 48 hours and during intensive care unit (ICU) stay in the same cohort of unselected critically ill patients with and without obesity. Which are the incidence and risk factors of extubation failure in patients with and without obesity? In this prospective multicenter observational FREE-REA study in 26 intensive care units, the primary objective was to compare the incidence of extubation failure within 48 hours in patients with and without obesity. Secondary objectives were to describe and to identify the independent specific risk factors for extubation failure using first a logistic regression model and second a decision tree analysis. Of 1,370 extubation procedures analyzed, 288 (21%) were performed in patients with obesity and 1082 (79%) in patients without obesity. The incidence of extubation failure within 48 hours among patients with or without presence of obesity was 23/288 (8.0%) versus 118/1082 (11%) respectively; unadjusted odds ratio (OR) 0.71 95% confidence interval (CI, 0.45-1.13), P=0.15); alongside patients with obesity receiving significantly more noninvasive ventilation (87/288, 30% versus 233/1082, 22%, P=0.002) and physiotherapy (165/288, 57% versus 527/1082, 49%, P=0.02) than patients without obesity. Risk factors for extubation failure also differed according to obesity status: female gender [adjusted (a)OR 4.88 95%CI(1.61-13.9), P=0.002] and agitation before extubation [aOR 6.39 95%CI (1.91-19.8), P=0.001] in patients with obesity; absence of strong cough before extubation [aOR 2.38 95%CI (1.53-3.84), P=0.0002] and duration of invasive mechanical ventilation before extubation [aOR 1.03 per day 95%CI (1.01-1.06), P=0.01] in patients without obesity. The decision tree analysis found similar risk factors. Our findings indicate that anticipation and application of preventive measures for patients with obesity before and after extubation led to similar rate of extubation failure among patients with and without obesity. NCT XXX.
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