Fig. 4

Propofol dose at LOC. a, b and c show, respectively, the correlations of propofol induction dose with TBW, FFM and TBW•phase angle of Age < 65 group. d, e and f illustrate, respectively, the correlations of propofol induction dose with TBW, FFM and TBW•phase angle of Age ≥ 65 group. Grey line in a and d represents the function equivalent to the standard adult and older propofol dose (2 mg•TBW in a and 1mg•TBW in d), respectively. BMI | Body mass index. FFM | Fat free mass. LOC | Loss of consciousness. TBW | Total body weight