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Table 2 In vitro study statistics

From: Water-soluble polyphenol-rich clove extract lowers pre- and post-prandial blood glucose levels in healthy and prediabetic volunteers: an open label pilot study

IC50

Standard Error

95% Confidence Interval

R2

Glucose Production

 63.80 μg/mL

0.0632

45.22–90.01

0.7192

α-Glucosidase Activity

PCE

 60.84 mg/mL

0.0283

52.84–70.05

0.9523

Acarbose

 40.28 mg/mL

0.0276

35.00–46.21

0.9568

α-Amylase Activity

 51.63 μg/mL

13.29

45.39–58.71

0.9615

  1. For the inhibitory action that PCE has on glucose production and carbohydrate hydrolyzing enzymes, we calculated the IC50 values using the log (inhibitor) vs. response equation with variable slope in GraphPad Prism 5.0 software. Standard error, 95% confidence intervals, and goodness of curve fitting (R2) are shown