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Volume 6, Number 5—October 2000

Dispatch

Antimicrobial-Drug Use and Changes in Resistance in Streptococcus pneumoniae

Daniel J. DiekemaComments to Author , Angela B. Brueggemann, and Gary V. Doern
Author affiliations: University of Iowa College of Medicine, Iowa City, Iowa

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Table 2

Prescriptions for antibiotics at medical centers with high, intermediate, and low antimicrobial-drug usea

Class/tertile Mean Median Range SD
Beta-lactams
High 1,640 1,620 1,186-2,557 411
Intermediate 1,027 1,040 948-1,136 69
Low 859 870 777-917 51
Macrolides
High 929 865 800-1,286 166
Intermediate 738 722 687-787 35
Low 609 623 528-673 52
Quinolones
High 282 258 222-424 63
Intermediate 197 200 177-216 16
Low 143 146 91-170 27
Tetracyclines
High 77 75 61-100 15
Intermediate 56 58 50-59 3
Low 33 34 25-45 7

aAll values are expressed in units of mean number of prescriptions per 100,000 population per month during the period between the two surveillance studies (May 1994-April 1998).

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