Fig. 2.

Risk network for MDRO colonization. Blue nodes represent MDRO colonization, and gray nodes represent antibiotic exposure. Each directed arrow indicates that the source node is predicative of the recipient node. Here antibiotic exposure is assumed to be risk factors for colonization, whereas bacterial colonization could either be the risk factor for subsequent colonization, or a result of antibiotic exposure and/or previous colonization. The magnitude of the hazard ratio is reflected in edge thickness and shown in numbers. All associations shown are statistically significant with P < 0.05.