Table 5:

Correlation between Pairs of Measures of Bacillary Burden among Culture-Positives Only and Test-Positives Only

	All Culture-Positive Samples					Culture-Positive Samples with Positive Xpert/Smear
	Xpert CT/TTCP		Smear/TTCP			Xpert CT/TTCP		Smear/TTCP
	N	Spearman ρ	N	Spearman ρ	P Value	N	Spearman ρ	N	Spearman ρ	P Value
Overall	406	0.58 (0.53 to 0.63)	302	0.58 (0.53 to 0.64)	1.00	299	0.57 (0.50 to 0.64)	179	0.35 (0.21 to 0.48)	0.003
HIV−	133	0.64 (0.54 to 0.73)	119	0.62 (0.53 to 0.71)	0.795	120	0.44 (0.28 to 0.59)	90	0.15 (−0.03 to 0.32)	0.023
HIV+, CD4 ≥200	61	0.53 (0.42 to 0.64)	52	0.50 (0.40 to 0.60)	0.834	56	0.59 (0.41 to 0.76)	34	0.21 (0.12 to 0.55)	0.040
HIV+, CD4 <200	106	0.41 (0.27 to 0.55)	96	0.45 (0.33 to 0.57)	0.734	93	0.45 (0.31 to 0.59)	35	0.44 (0.15 to 0.72)	0.952

Definition of abbreviations: ρ = Spearman correlation coefficient; C_T = cycle threshold; TTCP = time to culture positivity; Xpert = Xpert MTB/RIF.