PMC

Included and excluded subjects in study cohort (ALI, acute lung injury; ARDS, adult respiratory distress syndrome; BMI, body mass index).

Risk-adjusted odds ratio for continuous body mass index (BMI) model and hospital mortality. The solid line indicates the point estimates for the adjusted odds ratios for the BMI shown on the x-axis. The gray area represents the 95% confidence interval for the adjusted odds ratio at each BMI. The referent BMI is the rounded midpoint (BMI = 22 kg/m²) of the normal BMI category. Above the horizontal line indicates increased hospital mortality relative to those individuals with a BMI of 22 kg/m² and below the line indicates decreased hospital mortality. The risk-adjusting model includes age, gender, race, Simplified Acute Physiology Score II probability of survival, diagnosis of renal or genitourinary disease, and an intensive care unit–acquired renal or genitourinary complication. Hosmer-Lemeshow goodness of fit test, p = .227.