Table 1 Comparison of CD4 counts obtained by PIMA analyzer and the reference methods within different CD4 ranges
CD4 Range (Cells/mm3) | N | Median CD4 Count (Range)* Cells/mm3 | Mean relative bias (±2SD) | |
|---|---|---|---|---|
Reference Method | PIMA Analyzer | |||
All | 1790 | 356 (2–1726) | 354 (6–1615) | −1% (−43, 42) |
<250 | 508 | 165 (2–250) | 168 (6–348) | −7% (−65, 51) |
<350 | 877 | 228 (2–350) | 225(6–542) | 5% (−45,55) |
251-350 | 369 | 298 (251–350) | 299 (153–542) | −2% (−40, 36) |
351-500 | 423 | 417 (351–500) | 415 (213–676) | 0% (−30, 30) |
>500 | 490 | 648 (502–1726) | 637 (179–1615) | 5.1% (−23, 33) |