Bland-Altman analyses to evaluate repeatability in HIV-1 viral load quantification in 40 detectable a) DBS b) DPS collected from patients visiting Nyanza patient support centers and tested with Abbott.

<p>The difference between the references Run 1 and the comparisons Run 2 were plotted against the average of the reference group.</p

Comparisons between CAP/CTM dried blood spot and Abbott dried blood spot tests at different cut-offs using CAP/CTM plasma as the gold standard.

<p>Comparisons between CAP/CTM dried blood spot and Abbott dried blood spot tests at different cut-offs using CAP/CTM plasma as the gold standard.</p

HIV-1 RNA detection rates of dried blood spot (DBS) specimens paired with plasma specimens prepared from patient support centers in Nyanza, Kenya.

<p>(November 2012 to February 2013).</p

Concordance correlation analyses of HIV-1 viral load (VL) quantification among plasma and dried plasma spot specimens collected from patients visiting Nyanza patient support centers and tested with CAP/CTM and Abbott.

<p><b>a)</b> CAP/CTM plasma vs. DPS VL; <b>b</b>) Abbott plasma vs. DPS VL.</p

Concordance correlation analyses of HIV-1 (VL) quantification among plasma and DBS specimens collected from patients visiting Nyanza patient support centers and tested with CAP/CTM and Abbott.

<p><b>a)</b> CAP/CTM plasma vs. DBS VL; <b>b</b>) Abbott plasma vs. DBS VL.</p

Probit analysis for Abbott dried blood spot viral load limit of detection.

<p>Limit of detection 1,222copies/mL, 95% CI (978.12, 1873.7).</p

HIV-1 RNA detection rates of dried plasma spot (DPS) specimens paired with plasma specimens prepared from patient support centers in Nyanza, Kenya.

<p>(November 2012 to February 2013).</p

Bland-Altman analyses to evaluate agreement in HIV-1 viral load (VL) quantification among plasma and dried plasma spot specimens collected from patients visiting Nyanza patient support centers and tested with CAP/CTM and Abbott.

<p>The difference between the reference and the comparison specimen type were plotted against the average of the reference group and the comparison specimen type <b>a</b>) CAP/CTM DPS VL; <b>b</b>) Abbott DPS VL.</p

Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) (95% confidence intervals) of dried blood spot (DBS) and dried plasma spot (DPS) compared with paired plasma specimen VL, patient support centers, Nyanza, Kenya.

<p>(November 2012 to February 2013).</p