Role of duration of catheterization and length of hospital stay on the rate of catheter-related hospital-acquired urinary tract infections

Figures & data

Table 1 Demographic characteristics of selected patients according to diagnosis, sex, and percentage of infected patients

Patients classified into six groups according to principle diagnosis with which they were admitted	Indication of catheter	Number of patients	Number (percentage) of infected patients	Sex
				Male	Female
Group A (benign prostatic hyperplasia)	Bladder outlet obstruction	70	35 (50%)	100%	0%
Group B (prostate cancer)		45	9 (21%)	100%	0%
Group C (urinary incontinence)	Urinary incontinence	48	7 (14%)	22%	78%
Group D (bladder outlet obstruction)	Bladder outlet obstruction	20	3 (15%)	53%	47%
Group E (colon cancer)	Measurement of urine output	37	23 (62%)	33%	67%
Group F (hepatic carcinoma)		30	23 (77%)	47%	53%
Total		250, all of whom were catheterized	100 (40%)	43.6%	56.4%

Table 2 Association between age and comorbidities in rate of catheter-related hospital-acquired UTI

Classification of patients according to age	Number (percentage) of patients	Number (percentage) of infections	Comorbidities
			Diabetes		Hypertension		Operations		Antibiotics
			No UTI	UTI	No UTI	UTI	No UTI	UTI	No UTI	UTI
32–53 years	65 (26%)	15 (23%)	0	0	0	0	6	1	6	1
55–62 years	97 (39%)	40 (41.2%)	6	17	0	0	16	5	16	5
Above 62 years	88 (35%)	45 (51.8%)	7	28	5	0	31	17	31	17
Total			13	45	5	0	53	23	53	23
Total	250 (100%)	100 (40%)	58		5		76		76
RR, chi-square test, P-value			RR =1.1, r^2=0.74539, P-value =0.02		RR =1.3, r^2=0.811634, P-value =0.03		RR =1.3, r^2=0.985634, P-value =0.04

Abbreviations: RR, relative risk; UTI, urinary tract infection.

Figure 1 Percentage of organisms causing UTIs.

Abbreviation: UTIs, urinary tract infections.

Table 3 Statistically significant reduction in rate of CR UTI in relation to the duration of catheterization (median 8 days in infected patients versus 3 days in noninfected patients; P<0.05)

Patients classified into six groups according to principle diagnosis with which they were admitted	Patient had urinary catheter	Sex %	Age (mean)	Duration of catheterization in days (median)	CR UTI		Unpaired student’s t-test	Chi-square χ2	P-value
		Males	Years		Percent	N
Group A (benign prostatic hyperplasia)	44	100%	47	8	68%	30	0.000159951	0.98769558	0.01423
Group B (prostate cancer)	46	100%	36	3	15%	7		0.58547998	0.01634
Group C (urinary incontinence)	41	56%	42	6	36.5%	15		0.76564967	0.02245
Group D (bladder outlet obstruction)	48	45%	55	5	33%	16		0.98648597	0.01456
Group E (colon cancer)	31	39%	49	4	39%	12		0.57687960	0.03867
Group F (hepatic carcinoma)	40	41%	50	6	50%	20		0.89598694	0.01578
Total	250					100

Abbreviations: CR, catheter-related; UTI, urinary tract infection.

Table 4 Statistically significant reduction in rate of CR UTI in relation to the length of hospital stay for each patient with a urinary catheter (median 18 days in infected patients versus 10 days in noninfected patients; P-value <0.05)

Patients classified into six groups according to principle diagnosis with which they were admitted	Patient had urinary catheter	Sex %	Age (mean)	Length of stay in days (median)	CR UTI		Unpaired student’s t-test	Chi-square χ^2	P-value
		Males	Years		Percent	N
Group A (benign prostatic hyperplasia)	49	100%	50	18	85.7%	42	0.027741735	0.9879886987	0.01789
Group B (prostate cancer)	32	100%	49	12	53%	17		0.8987098796	0.04654
Group C (urinary incontinence)	37	60%	55	10	8%	3		0.9870989877	0.02234
Group D (bladder outlet obstruction)	45	49%	42	14	31%	14		0.98670987078	0.03953
Group E (colon cancer)	47	43%	36	13	21%	10		0.7685980090	0.05368
Group F (hepatic carcinoma)	40	45%	47	15	31%	14		0.987969860	0.05432
Total	150					78

Abbreviations: CR, catheter-related; UTI, urinary tract infection.