As compared with matched not-weak patients , weak patients had a lower likelihood for live weaning from mechanical ventilation ( hazard ratio [ HR ] , 0.709 [ 0.549-0 .888 ] ; P = 0.009 ) , live ICU ( HR , 0.698 [ 0.553-0 .861 ] ; P = 0.008 ) and hospital discharge ( HR , 0.680 [ 0.514-0 .871 ] ; P = 0.007 ) .