Table 2.
Results of statistical analysis of agreement between the glucometer brands and the reference laboratory at ogtt time points.
| Glucometer brands | T = 0 min | T = 60 min | T = 120 min |
|---|---|---|---|
| Proportion of results within Total Allowable Error: (ISO 15197:2013 defined) between glucometers and the reference laboratory (%) | |||
| Overall (n = 592) | 92.4 | 49.8 | 61.5 |
| Contour Plus (n = 143) | 96.5 | 29.4 | 53.1 |
| Accu-Chek Active (n = 56) | 100 | 58.9 | 67.9 |
| Glucocheck Classic (n = 105) | 76.2 | 30.5 | 35.2 |
| Freestyle Optium Neo (n = 143) | 94.4 | 63.6 | 77.6 |
| One touch Select Plus Flex (n = 145) | 95.2 | 66.9 | 70.3 |
| Bland Altman (95% LoA) mmol/l average difference against the mean between glucometers and the reference laboratory | |||
| Overall (n = 592) | 0.22 (−0.69–1.12) | 0.96 (−0.65–2.56) | 0.73 (−0.73–2.19) |
| Contour Plus (n = 143) | 0.27 (−0.32–0.86) | 1.20 (−0.04–2.44) | 0.88 (−0.18–1.93) |
| Accu-Chek Active (n = 58) | 0.12 (−0.49–0.72) | 0.72(−0.67–2.11) | 0.59 (−0.54–1.71) |
| Glucocheck Classic (n = 105) | 0.57 (−0.52–1.65) | 1.51 (−0.58–3.60) | 1.16 (−0.96–3.29) |
| Freestyle Optium Neo (n = 143) | 0.00 (−0.81– 0.81) | 0.70 (−0.57–1.96) | 0.51 (−0.62–1.64) |
| One Touch Select Plus Flex (n = 145) | 0.17 (−0.74–1.07) | 0.66 (−0.69–2.00) | 0.54 (−0.74–1.82) |
OGTT = oral glucose tolerance test.
Note: Bland Altman difference against the mean: p < 0.001 for all values at all time points of the OGTT, except for the Freestyle Optium Neo which was neutral at fasting.