Table 3. Univariate and multivariate analyses of current hospitalisation-related factors associated with a CTX-M-producing ST131 or non-ST131 E. coli clinical isolate.

	Univariate analysis				Multivariate analysis
Characteristic	ST131 (n = 55)	Non-ST131 (n = 97)	Odds ratio	P value	Odds ratio	P value
	No. (%)	No. (%)	(95% CI)		(95% CI)
Transferred from another hospital	32 (25.5)	18 (18.6)	1.5 (0.7–3.3)	0.3
Mc Cabe score 2	11 (21.6)	23 (27.1)	0.7 (0.3–1.7)	0.5
Immunocompromised	15 (27.3)	36 (37.1)	0.6 (0.3–1.3)	0.2
Between admission and inclusion
- Ward
• ICU	4 (7.3)	27 (27.8)	0.3 (0.1–0.9)		0.2 (0.05–0.8)	0.02
• LTCF	21 (38.2)	14 (14.4)	2.8 (1.2–6.3)	0.0009*	4.4 (1.3–14.7)	0.02
• Others	30 (54.5)	56 (57.8)	1		1
- Invasive device during the last week	33 (60.0)	84 (86.6)	0.2 (0.1–0.5)	0.0003
• urine drainage	11 (20.0)	45 (46.4)	0.3 (0.1–0.6)	0.002
• mechanical ventilation	5 (10.6)	19 (20.0)	0.5 (0.2–1.4)	0.2
• intravascular devices	31 (56.4)	81 (84.4)	0.2 (0.1–0.5)	0.0003
- Antibiotic receipt	24 (43.6)	57 (58.8)	0.5 (0.3–1.1)	0.07
• cotrimoxazole	3 (5.5)	6 (6.2)	0.9 (0.2–3.6)	0.9
• fluoroquinolones	7 (12.7)	10 (10.3)	1.3 (0.5–3.5)	0.7
• penicillins	10 (18.2)	26 (26.8)	0.6 (0.3–1.4)	0.2
• extended spectrum cephalosporins	6 (10.9)	12 (12.4)	0.9 (0.3–2.5)	0.8
• aminoglycosides	2 (3.6)	11 (11.3)	0.3 (0.06–1.4)	0.1
• carbapenems	1 (1.8)	8 (8.3)	0.2 (0.03–1.7)	0.14
• ≥5 days	13 (23.6)	35 (36.1)	0.5 (0.3–1.2)	0.1
Specimen and infection data
- specimen sampled after 48 h of hospitalisation	35 (63.6)	51 (52.6)	1.6 (0.8–3.1)	0.2
- specimen sampled after >10 days of hospitalisation	21 (38.2)	35 (36.1)	1.1 (0.6–2.2)	0.8
- urine sample	39 (70.9)	58 (59.8)	1.6 (0.8–3.3)	0.2
- urinary tract infection	42 (76.4)	58 (59.8)	2.2 (1.0–4.6)	0.04

ICU; intensive care unit, LCTF; long term care facility,

^*P value resulting from the analysis of the variable “ward” classified into 3 categories, ie ICU, LCTF and others.