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Sensitivity, specificity, and positive and negative predictive values for CLIA insulin concentrations against RIA concentrations, at 3 commonly used diagnostic cutoffs
| Diagnostic cutoff | Number of Samples | Sensitivity (%) | Specificity (%) | Positive Predictive Value (%) | Negative Predictive value (%) |
|---|---|---|---|---|---|
|
Basal Insulin >20 μIU/mL |
34 | 67 | 96 | 92 | 81 |
|
Basal Insulin >32 μIU/mL |
34 | 100 | 97 | 91 | 100 |
|
CGIT 45 minutes Insulin >100 μIU/mL |
15 | 100 | 100 | 100 | 100 |
CGIT, combined glucose‐insulin tolerance test.
