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Table 1 Accuracy percentage based on the measured warfarin concentrations of standard points and QC samples. The mean measurements are for day 1, day 2 and day 3

From: Critical pharmacokinetic and pharmacodynamic drug-herb interactions in rats between warfarin and pomegranate peel or guava leaves extracts

Final calculated concentration (ng/ml) Mean measured concentration (ng/ml) Standard Deviation (SD) Coefficient of Variation (%CV) Accuracy (%)
100 96.84 2.19 2.27 96.84
200 201.61 9.15 4.54 100.8
500 495.13 19.45 3.93 99.03
1000 981.22 23.39 2.38 98.12
2000 1969.12 53.24 2.71 98.46
3000 2950.57 23.15 0.78 98.35
4000 3945.3 63.52 1.61 98.63
QC low (300) 300.28 12.47 4.15 100.09
QC mid (1800) 1747.26 28.48 1.63 97.07
QC high (3500) 3493.65 239.92 6.87 99.82