Table 5.

Summary of associations between bias and the 6 factors, and between error and the 6 factors.

Factor	Bias				Error
	Model 2A: NC=WIV		Model 2B: NC=FT		Model 3A: NC=WIV		Model 3B: NC=FT
	Overall F-test	Summary	Overall F-test p-value	Summary	KW test p-value	Summary	KW test p-value	Summary
	ARV	<0.001	Highest estimated bias for DRV and RGV; many statistically significant pairwise differences.	0.253	--	<0.001	Many; highest (ranks of) errors for DRV and RGV.	<0.001	{DRV,NVP} > {RGV,RTV,ZDV}, and DRV>MVC.
Lab	<0.001	Labs 6 and 7 have higher recoveries than most other labs. Lab 2 has lowest recovery(below 100%).	<0.001	Labs 6 and 7 have higher recoveries than most other labs. Lab 2 has lowest recovery (below 100%).	<0.001	{3, 6, 7} >all others.	<0.001	{3, 6, 7} >all others, and 3>6.
WIV category, L/M/H within analyte	<0.001	Low & Medium > High	0.099	--	0.872	--	0.563	--
WIV category, “power of ten”	0.005	Despite p<0.05, no pairwise differences were statistically significant.	0.907	--	0.125	--	0.941	--
Round	0.093	--	0.413	--	<0.001	Round 23 > 24 & 25.	0.094	--

KW = Kruskal-Wallis test. ARV = antiretroviral drug, WIV = weighed-in value. L/M/H = low/medium/high. NC = nominal concentration. FT = final target.