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Table 1 Comparison of CD4 counts obtained by PIMA analyzer and the reference methods within different CD4 ranges

From: Utility of the point of care CD4 analyzer, PIMA, to enumerate CD4 counts in the field settings in India

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)
  1. *: The differences between the median CD4 counts obtained by the one of the reference methods and the PIMA analyzer was statistically insignificant for all CD4 ranges (P > 0.05).