Are Cotinine Strips Accurate? 8 Tests Compared on Sensitivity and Cutoffs
Short answer: a rapid cotinine strip is accurate at what it is built to do, which is give a yes/no answer at a fixed threshold. It is not a measurement. A strip set at 200 ng/mL cannot tell you whether a sample held 210 or 2,100 nanograms per millilitre — only that it crossed the […]
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