Fig. 4From: Performance and immune characteristics of bronchoalveolar lavage by research bronchoscopy in pulmonary tuberculosis and other lung diseases in the Western Cape, South AfricaCorrelative relationships between a) macrophage frequency and age, b) neutrophil frequency and age. Significance determined at P < 0.05 using Pearson’s correlation or Spearman’s rank-order correlation tests, as appropriate following normality testingBack to article page