Figure 2From: Clinical review: Efficacy of antimicrobial-impregnated catheters in external ventricular drainage - a systematic review and meta-analysisEffect of antimicrobial-impregnated catheters on cerebrospinal fluid infection. Pooled odds ratios were calculated using the Mantel-Haenszel (M-H) method with the random-effects model. Results of randomized controlled trials (RCTs) and nonrandomized studies were subanalyzed. CI, confidence interval; NPS, nonrandomized prospective study.Back to article page