Table 1.

Relative risk of colistin and tobramycin resistance

	Relative risk (95% CI)
	SDD study II	SDD study II	SOD study II	SOD study II
	vs. standard care	vs. study I	vs. standard care	vs. study I
Colistin
Rectum	0.63 (0.29-1.38)	0.62 (0.29-1.33)	0.41 (0.17-0.98)	0.94 (0.30-2.97)
Respiratory tract	1.26 (0.35-4.57)	0.52 (0.21-1.31)	0.66 (0.16-2.73)	0.34 (0.10-1.18)
Tobramycin
Rectum	0.35 (0.23-0.53)	0.64 (0.40-1.04)	0.66 (0.47-0.95)	0.56 (0.39-0.78)
Respiratory tract	0.48 (0.32-0.73)	0.78 (0.49-1.25)	0.42 (0.27-0.64)	0.48 (0.30-0.76)

CI, confidence interval; SDD, selective digestive tract decontamination; SOD, selective oropharyngeal decontamination.