Table 4

Power (%) to detect prevalence ratios of macrolide and β-lactamase resistance in 200 Escherichia coli and 200 Streptococcus pneumoniae isolates per treatment group

Resistance prevalence (%) in placebo group
Resistance prevalence (%) in azithromycin group10203040506070
 10
 2080
 30>9964
 40>999955
 50>99>999848
 60>99>99>99>9952
 70>99>99>99>999855
 80>99>99>99>99>999964