Figure 4. Median (range) warfarin dose requirements in African–Americans with the CYP2C9*1/*1 genotype compared with CYP2C9*8 allele carriers and carriers of a CYP2C9*2, *3, *5, *6 or *11 allele.

Lines within boxes represent medians. Lower and upper borders of the boxes represent 25th and 75th percentiles, respectively. Whiskers below and above boxes represent 10th and 90th percentiles, respectively.

NS: Not significant.

Data taken from [21].