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Table 3 Proportion of patients with prolonged PT-INR at peak daptomycin concentration and the relative change of PT-INR between trough and peak

From: Dose-dependent artificial prolongation of prothrombin time by interaction between daptomycin and test reagents in patients receiving warfarin: a prospective in vivo clinical study

Reagent

PT-INRpeak > PT-INRtrough (%)

p valuea

PT-INRpeak/PT-INRtrough (95% CI)

p valueb

1

26/35 (74%)

0.006

1.05 (1.02–1.07)

1.00

2

27/35 (77%)

0.002

1.04 (1.01–1.07)

1.00

3

31/35 (89%)

<0.001

1.07 (1.03–1.11)

0.94

4

20/35 (57%)

0.50

1.00 (0.98–1.02)

1.00

5

20/35 (57%)

0.50

1.01 (0.98–1.03)

1.00

6

20/35 (57%)

0.50

1.02 (0.97–1.07)

1.00

7

25/35 (71%)

0.02

1.04 (1.01–1.08)

1.00

8

25/35 (71%)

0.02

1.05 (1.01–1.09)

0.99

9

19/35 (54%)

0.74

1.00 (0.98–1.02)

1.00

  1. PT-INR prothrombin time-international normalised ratio, CI confidence interval
  2. ap values by binomial test compared to 0.50
  3. bOne-sided p value by t test to test whether the ratio is more than 1.10