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Table 4 Intra-assay and inter-assay coefficients of variation for hand-held meters FreeStyle Precision (FSP), GlucoMen LX Plus (GLX) and WellionVet GLUCO CALEA (WGC) within low, medium and high glucose concentrations

From: Glucose concentration in capillary blood of dairy cows obtained by a minimally invasive lancet technique and determined with three different hand-held devices

Parameter Glucose concentrationa
  FSPc GLXd WGCe
  Low Medium High Average Low Medium High Average Low Medium High Average
Intra-assay
 Mean [mg/dL] 26.80 46.60 63.50 45.64 28.90 57.40 73.30 53.20 109.50 122.20 119.60 117.10
 SD [mg/dL] 1.99 2.07 2.27 2.11 2.64 11.30 10.58 8.17 19.70 20.20 15.20 18.37
 CVb [%] 7.43 4.44 3.57 5.15 9.13 19.69 14.43 14.42 17.99 16.53 12.71 15.74
Inter-assay
 Mean [mg/dL] 26.40 48.40 66.10 46.70 40.00 58.70 74.50 57.73 93.40 113.30 114.30 107.00
 SD [mg/dL] 1.58 1.65 2.18 1.80 8.94 12.96 11.35 11.08 14.39 16.53 8.94 13.29
 CVb [%] 5.98 3.41 3.30 4.23 22.35 22.08 15.23 19.89 15.41 14.59 7.82 12.61
  1. aBased on measurements using FreeStyle Precision (low = 30 mg/dL; medium = 56 mg/dL; high = 70 mg/dL)
  2. b Coefficient of variation = SD × 100/mean
  3. cFSP = FreeStyle Precision (Abbott GmbH & Co. KG, Wiesbaden, Germany)
  4. d GLX = GlucoMen LX Plus (A. Menarini GmbH, Vienna, Austria)
  5. e WGC = WellionVet GLUCO CALEA (MED TRUST Handelsges.m.b.H, Marz, Austria)