Body composition was assessed by anthropometry and bioelectrical impedance. Anthropometry: height and weight were determined using a Filizola® balance with the patient barefoot and wearing light clothes, and body mass index (BMI) was calculated [BMI = weight (kg)/height (m)2]. Bioelectrical impedance: patients were instructed to empty their bladder, rest for thirty minutes, and remove all metal objects before measurements. Resistance was measured in the right side of the body according to Kyle et al., (2004) (BIA 101, RJL Systems, Detroit, MI, USA). Fat Free Mass (FFM) was estimated from an equation developed for patients with respiratory failure  and FFM index T [FFMI = FFM (kg)/height (m)2] was calculated. Nutritional depletion was defined when FFMI < 15 kg/m2 for women and <16 kg/m2 for men .