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Table 3 Comparison of WBC detection by Gram stain and iQ200

From: Clinical usefulness of iQ200/iChem Velocity workstation for screening of urine culture

(Gram stain) / (iQ200) > 105 CFU/mL (%) (n = 248) > 104 CFU/mL (%) (n = 342)
(+)/(+) 97 (40.9) 113 (33.0)
(+)/(−) 21 (8.9) 28 (8.2)
(−)/(+) 89 (37.6) 103 (30.1)
(−)/(−) 30 (12.7) 98 (28.7)
  1. Gram stain results were available in 1810 samples
  2. The positive WBC result in gram stain is defined as ≥1/LPF; The positive WBC result in iQ200 is defined as ≥6/HPF