Table 3.

Acquired carbapenem resistance: univariate analysis, continuous variables

	No resistance (n = 62)		Resistance (n = 16)
	Median	95% CI	Median	95% CI	p
Age (year)	63.0	58.8–66	60	51.6–77.4	0.91
Weight (Kg)	79.5	74.8–86	71.5	68.2–82.4	0.11
Height (cm)	172	167–175	170	161.8–175.5	0 .53
SAPS2 score	54.5	49.4–62	43	30.6–57.4	0 .09
Duration of hospitalization before the inclusion (days)	1	0–3.2	2.5	1–10.4	0 .08
Duration of prior antibiotic therapy (days)	7.5	5.8–10	8.5	2.64–21	0.40
Duration of carbapenem antibiotic therapy (days)	7	5–9	9.5	7.3–11.4	0.04
Duration of antibiotic therapy up to the onset of resistance (days)	7.0	5.0–9.0	8.5	6–10.4	0.20
Duration of hospitalization in intensive care unit (days)	12	8.8–17	33	20.5–42.7	0.001
Total mechanical ventilation time (days)	8.5	6–15	25	5.3–35.6	0.04
Duration of mechanical ventilation before inclusion (days)	1	0–4.2	2.5	0.64–8.72	0.35
Duration of catecholamine treatment (days)	4	3–8	10.5	2. - 22.4	0.24

Data are expressed as median (confidence interval 95%) or counts (percentage). It is significant with p lower than 0.05