Table 2. Cox proportional hazard analysis of ESBL-PE acquisition.

Variable		Univariate analysis		Multivariate analysis
	Person-days	Crude HRa [95% CIb]	Pc	Adjusted HR [95% CI]	p
Low birth weight			0.01		0.01
No (> = 2500gr)	5300	Ref.d		Ref.
Yes (<2500gr)	324	2.6 [1.2; 5.5]		2.7 [1.2 ; 5.9]
Maternal job			0.21
No Job	3900	Ref.
Manual job	1500	1.0 [0.6; 1.9]
Office job	199	2.5 [1.0; 6.5]
Latrine type			0.41
Outside without flush	5100	Ref.
Outside with flush	137	0.7 [0.1; 5.4]
Inside without flush	176	0.5 [0.1; 3.8]
Inside with flush	232	2.1 [0.9; 5.3]
Habitat type			0.46
Room shared with other household	4389	Ref.
House shared with other household	500	0.8 [0.4; 1.4]
Individual house	410	1.3 [0.2; 2.5]
Number of rooms			0.63
1 room		Ref.
2 rooms and more		1.1 [0.6; 1.9]
Number of household members			0.16
Less than 5 members	4500	Ref.
5 members and more	1097	1.01 [0.5; 1.7]
Animal ownership			0.32
No	5370	Ref.
Yes	214	1.7 |0.2; 10.6]
Site			0.19		0.96
Semi-rural site	4100	Ref.		Ref.
Urban site	1500	1.4 [0.8; 2.5]		1.0 [0.5; 1.8]
Mode of delivery			<0.001		0.001
Vaginal delivery	5300	Ref.		Ref.
Cesarean	320	3.5 [1.8; 6.8]		3.4 [1.7 ; 7.1]
Supervising person at delivery			0.14
Non medical staff	1700	Ref.
Medical staff	3800	1.6 [0.8 ; 2.9]
Maternal ESBL-carriage			0.06		0.09
No	4000	Ref.		Ref.
Yes	1100	1.7 [1.0 ; 3.0]		1.6 [0.9 ; 2.9]
Antibiotic during delivery			0.04		0.04
No	5200	Ref.		Ref.
Yes	423	2.1 [1.0; 4.2]		2.2 [1.1; 4.5]
Place of delivery			0.09
Home	2600	Ref.
Health-care facilities	3000	1.6 [0.9 ; 2.7]
Hospitalization during the first month of life			0.23
No	5500	Ref.
Yes	84	2.7 |0.62; 11.2]
Antibiotics intake during the first month of life			0.54
No	5500	Ref.
Yes	58	2.0 [0.27;14.7]

^aHR, Hazard Ratio

^b95% CI, 95% Confidence Interval

^cp, p-value

^dRef., reference.