TABLE 3.

Comparison of demographic and clinical factors for patients infected with E. coli isolates with reduced susceptibility to ciprofloxacin versus those infected with fully susceptible E. coli isolates

Characteristic	Ciprofloxacin susceptibility category		Odds ratio (95% CIa)	P
	Reduced susceptibility (n = 19)	Fully susceptible (n = 57)
Median (range) age (yr)	69 (14–88)	52 (1–90)		0.35
Male (no. [%] of patients)	7 (37)	12 (21)	2.2 (0.6–7.9)	0.22
No. of days of prior hospitalization (mean [SD])	4.8 (7.7)	5.1 (10.7)		0.89
Underlying disease (no. [%] of patients)
None	4 (20)	17 (30)	0.6 (0.2–2.5)	0.67
Renal	6 (25)	12 (21)	1.9 (0.5–7.3)	0.34
Cancer	1 (5)	5 (9)	0.6 (0.02–5.9)	1.0
Chronic liver disease	2 (10)	5 (9)	1.2 (0.2–8.3)	1.0
Invasive device (no. [%] of patients)
None	4 (20)	6 (11)	2.3 (0.5–11.0)	0.25
Peripheral intravenous line	8 (42)	38 (67)	0.4 (0.1–1.2)	0.1
Urinary catheter	5 (25)	13 (23)	1.2 (0.3–4.6)	1.0
Central venous catheter	5 (26)	7 (12)	2.6 (0.6–11.1)	0.28
Receipt of any antibiotic over preceding 2 mo (no. [%] of patients)	8 (40)	16 (28)	1.9 (0.6–6.3)	0.39
Receipt of quinolone antibiotic over preceding 2 mo (no. [%] of patients)	1 (5)	0	Undefined	0.25
Receipt of nonquinolone antibiotic over preceding 2 mo (no. [%] of patients)	7 (35)	16 (28)	1.5 (0.4–5.1)	0.66

^aCI, confidence interval.