Do Herbal Formulas Influence the International Normalized Ratio of Patients Taking Warfarin? A Retrospective Study
Table 2
Changes in the international normalized ratio between the herbal and nonherbal groups.
Herbal group ( = 45)
Nonherbal group ( = 41)
value
INR greater than 3 (%)
9 (20.0)
16 (39.0)
0.052
INR less than 2 (%)
27 (60.0)
17 (41.5)
0.086
INR changed by one or more units (%)
12 (26.7)
11 (28.8)
0.986
INR increased by one or more units (%)
7 (15.6)
6 (14.6)
0.905
INR decreased by one or more units (%)
5 (11.1)
6 (14.6)
0.625
Mean INR (mean ± SD)
2.3 ± 0.4
2.4 ± 0.4
0.032
INR: international normalized ratio. Data are expressed as number or mean ± standard deviation; < 0.05 was considered significant. Statistical analysis by Pearson’s Chi-square test.