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Receiver operating characteristic (ROC) curve depicts sensitivity and 1 minus specificity level of urine AD7c-NTP for discrimination between PiB positive and PiB negative patients with AD or MCI. The area under the curve (AUC) is 0.83 (95% CI 0.68 to 0.97), with sensitivity, specificity, PPV, and NPV of 68.8% (95% CI 41.5–87.9), 92.9% (95% CI 64.2–99.6), 91.7% (95% CI 59.8–99.6), and 72.2% (95% CI 46.4–89.3), respectively, at a cutoff of 1.46 ng/ml.
