The corresponding pre - and post-intervention point prevalence of systemic antibiotic prescribing for treatment of infection was @ % and @ % in the IG -LSB- estimated prevalence ratio : @ ( @ % CI : @-@ @ ) , P = @ -RSB- compared with @ % and @ % , respectively , in the CG -LSB- estimated prevalence ratio : @ ( @ % CI : @-@ @ ) , P = @ -RSB- .