Table 3. Prevalence of antimicrobial resistance in nosocomial and community-acquired invasive isolates of Escherichia coli*.

Antimicrobial agent	Nosocomial		Community-acquired
	N	R% (n)	N	R% (n)	p	OR (CI 95%)
Ampicillin	3,337	61 (2,036)	3,734	54.6 (2,039)	<0.0001	1.64 (1.49–1.81)
Ciprofloxacin	3,325	22.6 (751)	3,730	16.7 (623)	<0.0001	1.46 (1.29–1.64)
Cotrimoxazole	3,098	34.3 (1,063)	3,484	28.2 (982)	<0.0001	1.33 (1.20–1.48)
Gentamicin	3,328	8.8 (293)	3,721	5.2 (193)	<0.0001	1.76 (1.46–2.14)
Cefotaxime	3,315	4.4 (146)†	3,724	1.9 (71)†	<0.0001	2.37 (1.76–3.19)
Multiresistance	2,414	19.3 (466)	2,586	13.1 (339)	<0.0001	1.59 (1.36–1.85)

*R%, percent resistance; OR, odds ratio; CI, confidence interval.
†Includes isolates with intermediate susceptibility and resistance.