CD4 and edema: Patients with MVP differed from the rest in that they had lower mean BMI (18 vs 25 kg/m2, p = 0.002) while the patients with normal echocardiographic findings had significantly higher mean CD4 counts (449 vs 266 cells/μl, p = 0.003) and were less likely to present with orthopnoea (0 vs 39%, p = 0.001) or oedema of the lower limbs (11 vs 48%, p = 0.004) (Table 2).