Table 3.
Statistical analysis of agreement in gestational diabetes diagnosis between the glucometers against the hexokinase method laboratory reference.
| All Glucometers (95% CI) | Contour Plus (Bayer) (95% CI) | Freestyle Optium Neo (Abbott) (95% CI) | Accu-Chek Active(Roche) (95% CI) | Glucocheck Classic (TaiDoc) (95% CI) | One touch Select Plus Flex (Lifescan) (95% CI) | |
|---|---|---|---|---|---|---|
| Number of participants | 592 | 143 | 143 | 56 | 105 | 145 |
| True Positive (n) | 27 | 7 | 8 | 1 | 9 | 2 |
| False Positive (n) | 48 | 5 | 6 | 1 | 26 | 10 |
| True Negative (n) | 514 | 131 | 129 | 53 | 70 | 131 |
| False Negative (n) | 3 | 0 | 0 | 1 | 0 | 2 |
| Sensitivity (%) | 90 (74; 98) | 100 (59; 100) | 100 (63; 100) | 50 (1; 99) | 100 (66; 100) | 50 (7; 93) |
| Specificity (%) | 91 (89; 94) | 96 (92; 99) | 96 (91; 99) | 98 (90; 100) | 73 (63; 81) | 93 (87; 97) |
| Positive Predictive Value (%) | 36 (25; 48) | 58 (28; 85) | 57 (29; 82) | 50 (1; 99) | 26 (12; 43) | 17 (2; 48) |
| Negative Predictive Value (%) | 99 (98; 100) | 100 (97; 100) | 100 (97; 100) | 98 (90; 100) | 100 (95; 100) | 98 (95; 100) |
| Positive Likelihood Ratio | 10.54 | 27.20 | 22.50 | 27.00 | 3.69 | 7.05 |
| Negative Likelihood ratios | 0.11 | 0.00 | 0.00 | 0.51 | 0.00 | 0.54 |
CI = confidence interval.