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. 2014 Mar 21;122(7):651–660. doi: 10.1289/ehp.1306912

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Random-effects meta-analysis of GII and tap water versus tap water re‑treated at point of use (POU) among studies in malfunctioning systems. Weights are from random-effects analysis. RR, relative risk. The pooled RR (95% CI) for these studies is 1.34 (1.00, 1.79). The measured exposure was consumption of centrally distributed tap water; participants received their tap water from centralized water treatment systems, and there was a documented malfunction in the distribution system.