FIG. 4.

HIV-1 viral loads (log₁₀ copies/ml) in DPS and DBS after RNA extraction with the Abbott sample preparation system or a Nuclisens manual extraction kit from bioMérieux for patient samples stratified according to plasma viral load. (A) Viral loads in plasma of <3.70 log₁₀ copies/ml. (B) Viral loads in plasma of >3.70 log₁₀ copies/ml. P values are calculated by the Wilcoxon test by comparing liquid plasma and spots. The gray squares represent medians, the boxes represent interquartile ranges, the whiskers represent lower and upper adjacent values, and the black dots represent outside values.