Figure 3From: Clinical review: Efficacy of antimicrobial-impregnated catheters in external ventricular drainage - a systematic review and meta-analysisEffect of different antimicrobial-impregnated catheters on cerebrospinal fluid infection. Pooled odds ratios were calculated using the Mantel-Haenszel (M-H) method with the random-effects model. The effects of three types of antimicrobial-impregnated catheters were explored respectively. CI, confidence interval.Back to article page