CD4 and pericardial effusion: Independent predictors of a small pericardial effusion were higher resting pulse rate (OR 1.051, 95% CI: 1.013–1.090, p = 0.009), low CD4 cell count (OR 0.996, 95% CI: 0.993–0.999, p = 0.004) and high WBC count (OR 1.280, 95% CI: 1.044–1.570, p = 0.018) (Table 4).