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. 2014 Jul 30;9(7):e103285. doi: 10.1371/journal.pone.0103285

Figure 2. Box and whisker plot of urine concentrations of lipoarabinomannan (LAM) expressed as ELISA optical densities in patients with HIV-associated tuberculosis stratified by indices of mycobacterial burden: a) sputum smear microscopy result (n = 84), b) sputum culture days to positivity (n = 84), c) urine Xpert result (n = 84), d) a composite index combining sputum smear microscopy and urine Xpert results (pos  =  positive; neg  =  negative).

Figure 2

Bars, box and whiskers indicate medians, 25th and 75th centiles and ranges, respectively. P-values are either Wilcoxon rank-sum tests or Kruskal-Wallis for comparison of medians.