Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Symptom improvement
RCT 4-armed trial	196 men	National Institutes of Health-Chronic Prostatitis Symptom Index (NIH-CPSI) scores after 6 weeks of treatment –5.2 with ciprofloxacin –3.9 with no ciprofloxacin	P = 0.15 Longitudinal regression analysis		Not significant
RCT	80 men	Mean improvement in NIH-CPSI score measured on scale from 0 to 43 6 weeks 5.4 with levofloxacin 2.9 with placebo	P = 0.2 The treatment group may have been too small for reliable conclusions to be drawn		Not significant