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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)