1. Figure 2. ROC curves for fasting values (A) and OGTT values (B) for detecting insulin resistance in PCOS women. Sensitivity is plotted against 1 − specificity (or the false positive rate) for various cut-off values. The ideal test is one that approaches or reaches the upper left corner of the graph (100% sensitivity and 100% specificity). A test that approximates a coin flip yields a diagonal from the lower left to the upper right corner of the graph. The cut-off point that has the best combination is located at the “knee” of the graph and is labeled for each parameter (A–G). The cut-off values of the test are given in Table 3.
A Fasting Glucose to Insulin Ratio Is a Useful Measure of Insulin Sensitivity in Women with Polycystic Ovary Syndrome1
J Clin Endocrinol Metab. 1998;83(8): doi: /jcem
J Clin Endocrinol Metab | Copyright © 1998 by The Endocrine Society

2. Figure 1. Regression plots of fasting glucose, fasting insulin, and fasting G:I ratio to S_I (10⁻⁴ min⁻¹/(μU/mL), as determined by FSIGT in PCOS women (n = 40).
A Fasting Glucose to Insulin Ratio Is a Useful Measure of Insulin Sensitivity in Women with Polycystic Ovary Syndrome1
J Clin Endocrinol Metab. 1998;83(8): doi: /jcem
J Clin Endocrinol Metab | Copyright © 1998 by The Endocrine Society