There was an increased risk of resistant infection among isolates usually sensitive to quinolones in the levofloxacin group vs placebo ( @/@ -LSB- @ % -RSB- vs @/@ -LSB- @ % -RSB- , respectively ; risk ratio , @ ; @ % CI , @-@ @ ) as well as a nonsignificant increased risk of suspected tendinitis ( @/@ -LSB- @ % -RSB- vs @/@ -LSB- @ % -RSB- ; risk ratio , @ ; @ % CI , @-@ @ ) .