Body composition and BMI. (A) Body composition in patients and controls. The patients tended to have a higher percentage of body fat, 37.5 (s.d. 11.5) %, compared to controls, 30.7 (s.d. 6.4) %, (P = 0.097), and in accordance with this a lower lean tissue mass 38.2 (s.d. 6.8) kg vs 50.5 (s.d. 11.9) kg in controls (P = 0.073). (B) There was no difference in the body mass index (BMI), between patients 22.4 (s.d. 4.5) kg/m2 and controls 24.8 (s.d. 3.6) kg/m2, (P = 0.318). Error bars are s.d.