From: Rapid evolution of fluoroquinolone-resistant Escherichia coli in Nigeria is temporally associated with fluoroquinolone use
1984-1986
1994-1996
2004-2006
Number of prescribing physicians
7
10
9
Mean ± SD drugs per prescription
3.1 ± 1.1
3.2 ± 0.5
4.5 ± 0.5
Median (Range for different physicians) drugs per prescription
3.1 (1.6-5)
3.25 (2.5-4)
4.71 (3.5-4.9)