1. Use of the GeneXpert tuberculosis system for HIV viral load testing in India 
Madlen Nash, John Ramapuram, Ramya Kaiya, Sophie Huddart, Madhukar Pai, Shrikala Baliga 
The Lancet Global Health 
Volume 5, Issue 8, Pages e754-e755 (August 2017)
DOI: /S X(17)
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license Terms and Conditions

2. Figure
Comparison of the Xpert viral load assay with the reference standard
(A) Pearson correlation plot of GeneXpert and COBAS TaqMan viral loads. Pearson's r coefficient indicates the strength of the linear relationship between two variables, where values close to 1 indicate stronger linear relationships. (B) Bland-Altman scatter plot. Bias was defined as the COBAS TaqMan log10 copies/mL of viral load minus the Xpert log10 copies/mL of viral load. The solid red line indicates the mean bias and the dashed red lines show the limits of statistically acceptable bias defined as the mean bias +/- 1·96 SD of bias.
The Lancet Global Health 2017 5, e754-e755DOI: ( /S X(17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license Terms and Conditions