Table 2

Multiple regression analysis of mean weekly warfarin dose (mg) related to genotypes, treatment group and age. Coefficients and significance levels are listed for each predictor. R2 values indicate the cumulative contribution of each predictor as they are entered into the model. P-value for the model was <0.0001.

Predictor
Warfarin dose (mg)
Significance
Adjusted R2 (cumulative)

Constant
72.297
P < 0.001

VKORC1 1173 T/T
-18.946
P < 0.001
0.101
VKORC1 1173 C/T
-11.930
P < 0.001
0.245
Treatment group
-8.540
P < 0.001
0.358
CYP2C9 *1/*2,*3
-7.275
P = 0.001
0.398
CYP2C9 *2/*2,*3
-15.459
P = 0.001
0.430
Age
-0.321
P = 0.004
0.472

Dose [mg/week] = 72.297 - 18.946 · (T/T) -11.930· (C/T) - 8.540 · (group) -7.275 · (*1/*2,*3) - 15.459 · (*2/*2,*3) - 0.321· (age)

Haug et al. Thrombosis Journal 2008 6:7   doi:10.1186/1477-9560-6-7