TABLE 2.

Linear regression analysis of correlation between the standard and the ultrasensitive HIV-1 MONITOR Tests

Viral load range (no. of copies/ml of plasma)	No. of specimens	Slope	Inter- cept	r	Ultrasensitive test RNA concn/standard test RNA concna
250–9,999	56	0.999	0.044	0.936	0.896
10,000–49,999	32	0.927	0.135	0.630	0.650
50,000–99,999	7	0.935	0.248	0.287	0.664
100,000–499,999	6	0.555	1.976	0.805	0.347

^aFor each specimen, the RNA concentration determined by the ultrasensitive method was divided by the RNA concentration determined by the standard method. The median of this ratio was determined for each group of specimens.