Spread of TEM, VIM, SHV, and CTX-M β-Lactamases in Imipenem-Resistant Gram-Negative Bacilli Isolated from Egyptian Hospitals

Table 4

Risk factors associated with isolation of Gram-negative bacilli isolates.

Risk factor	Gram-negative bacilli isolates	Total number of samples	Relative risk (95% CI)	value significance
Age
<40	26	45	1.07 (0.78–1.47)	0.66
>40	39	63
Sex
Male	29	49	1.09 (0.8–1.47)	0.59
Female	36	59
Trauma
Yes	48	59	2.34 (1.57–3.51)	<0.001
No	17	49
Hospitalization length other than ICU
<7 days	15	51	2.98 (1.33–4.61)	<0.001
>7 days	50	57
ICU admission
Yes	28	46	1.02 (0.45–2.47)	<0.001
No	37	62
Urinary catheter
Yes	18	32	0.91 (0.64–1.29)	0.58
No	47	76
Ventilator support
Yes	10	18	0.83 (0.51–1.35)	0.44
No	20	30
Central venous catheter
Yes	4	9	0.67 (0.31–1.43)	0.26
No	26	39

= 95% confidence interval.