Fig. 2

Time to first colonization with any Gram-negative bacteria resistant to tobramycin, ceftazidime, ciprofloxacin, meropenem or colistin in patients who were not already colonized with that specific resistant Gram-negative bacteria at time of ICU discharge. Bacteria that are intrinsically resistant to the antibiotics are excluded. Analysis after adjustment for individual ICU. p = 0.02 by Cox regression analysis for the difference between patients treated with selective decontamination of the digestive tract (dashed line; n = 426) or selective oropharyngeal decontamination (solid line; n = 409)