The occurrence of urinary tract infection and determinant factors among diabetic patients at Dessie Referral Hospital,South Wollo,Northeast Ethiopia

Abstract

Introduction:

Diabetic patients have a higher tendency of developing all infections, especially infections of the genitourinary tract. Urinary tract infections cause considerable disorders in diabetic patients, and if complicated, can cause renal failure. In Ethiopia, the magnitude of diabetes mellitus-associated urinary tract infections increased from 7.1% in 2005 to 33.9% in 2019. The successful management of patients suffering from urinary tract infections in diabetic patients depends upon the identification of risk factors. This study aimed to determine the magnitude and factors affecting the urinary tract infections among diabetic patients which enable professionals to prevent infections and manage them effectively.

Methods:

Hospital-based cross-sectional study was conducted with 365 diabetic patients selected by systematic sampling technique from March to April 2020. Data were collected by trained BSc nurses via face-to-face interview and patient chart review. Urine microscopy was done to diagnose urinary tract infections. Data were coded and entered using Epi data version 3.1 and exported to Statistical Package of Social Sciences version 26 for analysis. Variables with p-value < 0.25 in bivariable logistic regression were included multivariable logistic regression and variables with a p-value < 0.05 were considered statistically significant.

Results:

The magnitude of urinary tract infections was 22.3% (95% confidence interval: 18–27). The odds of being infected by urinary tract infections were significantly higher in diabetic females (adjusted odds ratio: 2.46; 95% confidence interval: 1.40–4.32), duration of diabetes mellitus diagnosis of ⩾5 years (adjusted odds ratio: 1.98; 95% confidence interval: 1.05–3.72), with comorbidity (adjusted odds ratio: 4.87; 95% confidence interval: 2.76–8.59) and khat chewer (adjusted odds ratio: 1.84; 95% confidence interval: 1.04–3.24) compared with their counter.

Conclusion and recommendation:

Urinary tract infections were high among diabetic patients. Predictors like sex, duration of diagnosis, comorbidity, and khat chewer were found to be associated with urinary tract infections. Improvement of the regular screening of patients with diabetes mellitus for urinary tract infections will provide more effective measures in prevention and management.

Keywords

Dessie Referral Hospital diabetes mellitus urinary tract infections

Introduction

Diabetes mellitus (DM) is a syndrome with disordered metabolism and hyperglycemia.¹ This resultant hyperglycemia impairs multiple immune pathways, including neutrophil activation and antibody function.^2,3 All these changes make diabetic patients prone to have more infections, such as urinary tract infection (UTI), respiratory tract, soft tissue, and skin infection.⁴ Bacterial infection is identified as the major problem in diabetics, and the hazard of acquiring an infection among patients with DM is higher than the normal individuals.⁵ The correlation between the occurrence of UTIs and diabetic patients has been attributed to various impairments in the body defense mechanism, poor metabolic control of DM, and incomplete bladder emptying due to autonomic neuropathy.⁶

Globally, 150 million people are diagnosed with UTIs yearly.⁷ Among diabetic patients, 40% of the years of life lost can be attributed to nonvascular conditions like cancers, infections, and neurodegenerative disorders.⁸ A matched cohort study conducted in Canadian primary care for 1-year follow-up on diabetic patients revealed an increased risk of genitourinary infections.⁵ A comparative study conducted in Nigeria indicated that patients with DM have highly prone to develop UTIs. Diabetic patients had 70% of the isolated organisms, while non-diabetic patients had 56% of the isolated organisms.⁹ The estimated magnitude of UTIs in Uganda was 13.3%.¹⁰ The magnitude of UTIs among patients with DM in Sudan was 19.5%.¹¹ This illustrates that prevalence is high in Africa. The most commonly observed infectious disease among Ethiopian DM patients is UTIs.¹² In Ethiopia, the prevalence of UTIs among diabetic patients is estimated between 13.9% and 33.8%.^13,14 Diabetes is also associated with prolonged hospitalization, septicemia, azotemia, and septic shock in patients with UTIs.¹⁵ UTIs caused significant morbidity in patients with DM, and if complicated, can cause severe renal injury and serious infections.¹⁶

UTIs are affected by factors like gender, educational status, and type of DM, duration of DM, insulin therapy, blood glucose level, and cigarette smoking. Behavioral factors like smoking and alcohol drinking have a vital effect on poor glycemic control which indirectly affects the occurrence of UTIs among those diabetics.¹⁷ Females were more likely to develop UTIs than males due to anatomic and physiologic factors¹⁰; diabetic patients with high blood glucose levels, type II DM, and patients who cannot read and write have more prone to be infected.¹⁸ A study conducted in New York showed that participants with diabetes receiving insulin therapy experience an even higher risk of infection than those not receiving insulin.^19,20

Even though some research was available in Ethiopia on the magnitude of UTIs among diabetic patients, there are limited studies on factors affecting UTIs. Especially, behavioral alcohol drinking, soft drink intake, perineal hygiene, cigarette smoking, and khat chewing, and clinical factors duration of DM diagnosis, comorbidity, and type of anti-diabetic medications were not addressed adequately which would enable nurses to prevent diabetic clients from UTIs by reducing those modifiable factors. Thus, this study had investigated the magnitude and associated factors of UTIs among patients attending the diabetic unit at Dessie Referral Hospital (DRH).

Methods

Study area

A study was conducted in DRH, Northeastern Ethiopia. Dessie town administration is the capital city of South Wollo zone of Amhara National Regional State in Ethiopia. It is found 472 km from Bahir Dar, the capital city Amhara region, and is 400 km from Addis Ababa, the capital of Ethiopia. The weather condition in north latitude and east longitude is 11.8ºC and 39ºC, respectively. DRH provides health care in different units, namely, inpatient (medical, surgical, pediatrics, orthopedics, and gynecology units), outpatients, including follow-up for chronic disorders, like DM, congestive heart failure (CHF), hypertension, acquired immunodeficiency syndrome (AIDS), and cancer chemotherapy. In a diabetic clinic, a total of 1850 clients visit this unit for follow-up per month.

Study design and period

A hospital-based cross-sectional study from 9 March to 8 April 2020 was conducted.

Sample size and sampling procedure

Sample size determination

The sample size was computed based on previous studies by taking prevalence for first and adjusted odds ratio (AOR) for the second objective of the study. After computing for both the first and second objectives with the consideration of 95% confidence interval (CI), 5% margin of error, the larger sample size was selected which was 365 (history of previous UTI). By adding a 10% non-response rate, the final sample size became 365.

Sampling procedure

Patients with both types I and II DM visit a diabetic unit of DRH for follow-up per month were 1850; among these, participants were selected by systematic random sampling with a sampling interval of five, and the first participant was selected by lottery method.

Data collection procedure

The participants were diabetic patients regardless of UTIs signs and symptoms and socio-demographic characteristics, clinical data, and behavioral factors were collected by two trained BSc nurses. A face-to-face interview and patients’ chart review for clinical data were done in alignment with the study participant’s follow-up data.¹⁶

Data collection tool

Tools for socio-demographic characteristics,^4,16,21 clinical data from client charts, and behavioral factors^13,20 were adapted from different works of literature based on the objective of the study and reviewed by an expert. Initially, the tools were prepared in English, then translated into the local language (Amharic), and back to English by language experts to maintain its consistency.

Diagnosis of UTIs was confirmed by direct microscopy urine examination for pathogen and leukocytes.

Collection, handling, and transportation of urine specimen

Mid-stream urine samples were collected using aseptically transferred to conical tubes. On the urine sample bottles, the patient’s name and age were indicated. Female participants were informed to clean their hands with water and their genital area before collection of the clean catch mid-stream urine samples. A total of 10 mL of well-mixed urine was aseptically transferred to labeled conical tubes. The tubes were centrifuged at 1000 revolutions per minute. The supernatant fluid was transferred into another container. The sediment was re-mixed by tapping the bottom of the tube. One drop of the well-mixed sediment was transferred to a clean slide and covered with a coverslip. The preparation was examined microscopically using the X10 and X40 objective lenses. The urine microscopy was performed in the microbiology laboratory of DRH by the laboratory technician.

Operational definition

UTI positive. The presence of ⩾ 1 bacteria or ⩾ 10 pus cells or white blood cells per high-power field (HPF) of urine for microscopic examination.²²

Cigarette smoking. The inhalation of the smoke of one or more burning tobacco encased in cigarettes.²³

Khat chewer. An act of chewing the leaves of the stimulant East African plant, Khat edulis, in any amount by the patients with DM as current practice.²⁴

Study participants

All adult patients with DM who were visiting the diabetic unit of DRH for follow-up were the source population and randomly selected patients with DM aged ⩾ 18 years who were attending a clinical follow-up visit at the diabetic unit of the hospital during the data collection period were the study population.

Inclusion and exclusion criteria

All adult diabetic patients who had to follow-up at DRH during the data collection period were included and patients who were too ill to respond to the questions, pregnant women, or patients with longer than 2 days of catheterization, or clients who took antibiotics within the last 2 weeks were excluded from the study.

Study variables

Dependent variable

UTIs

Independent variables

Socio-demographic factors. Age, sex, educational level, occupational status, and residence.

Clinical factors. Type of DM, duration of diagnosis, type of medication, history of previous UTIs, comorbidity, and serum sugar level.

Behavioral factors. Perineum hygiene habit, alcohol drinking habit, cigarette smoking, khat chewing, and soft drink intake.

Data quality assurance

A pre-test was done with 5% of the sample size at diabetic patients attending Woldia General Hospital, Ethiopia before the actual data collection, and a correction was made based on the pre-test feedback. The data collectors and supervisor were trained for 3 days on how to collect the data from the selected participants. And the progress of data collection was monitored by the supervisor every other day. Model fitness was tested by Hosmer and Lemeshow’s test, and it was 0.391.

Statistical analysis

Data were coded, entered, cleaned, and edited, using Epi data version 3.1 and exported to Statistical Package of Social Sciences (SPSS) version 26 for analysis. Before conducting the multivariable logistic regression analysis, preliminary analyses were conducted to assess multicollinearity by a variance inflation factor (VIF) and tolerance test, and became 1.02 and 0.98, respectively. The crude odds ratio (COR) used in estimating association in the bivariable logistic regression analysis and variables with a p-value < 0.25 in the bivariable logistic regression analysis were included in the multivariable logistic regression analysis. AOR with a 95% CI was used to assess the strength of the association. A p-value < 0.05 was used to declare statistical significance. Finally, findings were presented in tables, frequency, percentages, charts, and texts.

Results

Socio-demographic characteristics of participants

From 365 patients with DM were attending their follow-up at DRH, 359 participants were responded with a 98.4% response rate. The majority of the respondents were males, 199 (55.4%) and only 14.2% were single. A large proportion, 122 (34%) of the participants were found to be in the age group between 46 and 55 years. The majority 82 (22.8%) were government employees, 75 (20.9%) farmers, and 60 (16.7%) merchants. The educational level of the majority (83.3%) of the respondents was above primary school level (Table 1).

Table 1.

Socio-demographic status of diabetic patients at DRH, 2020 (N = 359).

Characteristics	Category	Frequency	%
Sex	Male	199	55.4
Sex	Female	160	44.6
Marital status	Single	51	14.2
	Married	217	60.4
	Widowed	65	18.1
	Divorced	26	7.2
Age in years	⩽ 20	30	8.4
	21–35	55	15.3
	36–45	51	14.2
	46–55	122	34.0
	⩾ 56	101	28.1
Residence	Urban	207	57.7
Residence	Rural	152	42.3
Educational status	Unable read and write	60	16.7
	Primary school	139	38.7
	Secondary school	94	26.
	College/university	66	18.4
Occupation of participants	Government employee	82	22.8
	Housewife	53	14.8
	Student	38	10.6
	Farmer	75	20.9
	Merchant	60	16.7
	Daily labor	40	11.1
	Others	11	3.1
Type of DM	Type I	100	27.9
Type of DM	Type II	259	72.1
Serum sugar level	< 126 mg/dL	110	30.6
Serum sugar level	⩾ 126 mg/dL	249	69.4
Duration of diagnosis	< 5 years	140	39.0
Duration of diagnosis	⩾ 5 years	219	61.0
Previous history of UTIs	No	212	59.1
Previous history of UTIs	Yes	147	40.9
Comorbidity	No	240	66.9
Comorbidity	Yes	119	33.1
Type of anti-diabetic medication	Oral anti-diabetic agents	204	56.8
Type of anti-diabetic medication	Insulin	114	31.8

DM: diabetes mellitus; UTIs: urinary tract infections.

Clinical and behavioral characteristics of participants

The majority of respondents had type II DM 259 (72.1%), and the proportion with the last fasting blood glucose higher than 126 mg/dL was 249 (69.4%). For 219 (61%) of the respondents, the duration of DM diagnosis was ⩾ 5 years. The occurrence of UTIs among patients with a long duration of diabetes was 27.9% (Table 2).

Table 2.

Factors associated with UTIs among patients with DM attending DRH, Dessie Ethiopia, 2020 (N = 359).

Variables		Urine microscopy		COR(95% CI)	AOR(95% CI)	p-value
Variables		Positive	Negative	COR(95% CI)	AOR(95% CI)	p-value
Sex	Male	31	168	1	1
Sex	Female	49	111	2.39 (1.43–3.98)	2.46 (1.40–4.32)*	0.02
Type of DM	Type I	13	87	1	1
Type of DM	Type II	67	192	1.91 (1.22–4.45)	1.08 (0.34–3.42)	0.21
Serum sugar level	< 126 mg/dL	17	93	1	1
Serum sugar level	⩾ 126 mg/dL	63	186	1.85 (1.02–3.34	1.56 (0.74–3.29)	0.238
Duration from DM diagnosis	< 5 years	19	121	1	1
Duration from DM diagnosis	⩾ 5 years	61	158	2.46 (1.39–4.33)	1.98 (1.05–3.72)*	0.035
Previous history of UTIs	No	37	175	1	1
Previous history of UTIs	Yes	43	104	1.96 (1.18–3.23)	1.18 (0.61–2.25)	0.612
Comorbidity	No	29	210	1	1
Comorbidity	Yes	51	68	5.43 (3.20–9.28)	4.87 (2.76–8.59)*	< 0.001
Khat chewing	No	38	174	1	1
Khat chewing	Yes	42	105	1.83 (1.11–3.02)	1.84 (1.04–3.24)*	0.034

COR: crude odds ratio; CI: confidence interval; AOR: adjusted odds ratio; DM: diabetes mellitus.

Statistically significant.

Regarding behavioral characteristics of respondents, 147 (40.9%) were khat chewers, 237 (65.7%) had a habit of washing their perineum after excretion, 28 (7.8%) were smokers, 28 (7.8%) of the participants were alcohol drinkers, and 130 (36.2%) consume soft drinks.

Magnitude of UTIs

Of 359 respondents, 80 (22.3%) were positive for UTIs based on microscopic urine analysis (95% CI: 18–27; Figure 1). Of these, 49 (61.3%) were females, about two-third, 61 (76.3%), of the participants were with DM ⩾ 5 years, and 51 (63.75%) of respondents had comorbidity.

Figure 1.

Graphic representation of microscopic urine analysis result among diabetic patients in DRH, Dessie, Ethiopia, 2020 (N = 359).

Factors associated with UTIs

Using the analysis of bivariable logistic regression and “enter” method, the variables sex, marital status, age, residence, educational status, occupation, type of DM, serum sugar level, duration of DM from diagnosis, previous history of UTIs, comorbidity, type of anti-diabetic medicine, khat chewing, smoke cigarette, and taking soft drink were statistically associated with UTIs at a p-value < 0.25, and were considered as candidates for multivariate logistic regression.

In multivariable logistic regression using the “Forward LR” method, the odds of UTIs were 2.4 times more likely among diabetic females than males (AOR: 2.46; 95% CI: 1.40–4.32). Diabetic patients who had greater than or equal to 5-year duration of DM diagnosis had two times the odds of UTIs than those who had less than 5-year duration (AOR: 1.98; 95% CI: 1.05–3.72). The odds of developing UTIs were considerably higher among DM patients who had comorbidity than those patients without comorbidity (AOR: 4.87; 95% CI: 2.76–8.59). The odds of being infected with UTIs were 1.8 times higher among diabetic patients who were khat chewers than those who are not khat chewers (AOR: 1.84; 95% CI: 1.04–3.24; Table 2).

Discussion

The current study’s findings revealed the severity of UTIs as well as socio-demographic, clinical, and behavioral aspects in diabetic individuals. In this study, the overall prevalence of UTIs was 22.3%. A report from studies conducted in Ethiopia, Saint Paul Specialized Hospital (22.6%),²⁵ Khartoum Hospital, Sudan (19.5%),¹¹ and Diabetes Center of King Saud University, Saudi Arabia (25.3%).²⁰

In contrast, the magnitude was lower than studies reported from Arba Minch Hospital (33.9%) in south Ethiopia,¹³ Dasman Diabetes Institute (35%) in Kuwait,²⁶ Tertiary Care Center in Nepal (54.7%),²⁷ and tertiary hospital in Malaysia (40.2%).⁴ The variation in magnitude might be due to differences in the study year, the host factor, and practices, such as social habits of the community and standards of personal hygiene.

In the meantime, the finding was higher in another study cited from Ethiopia Gondar University Hospital, Gondar (17.4%), Debre Tabor General Hospital (10.1%), five hospitals in Harar (15.4%), Hawassa University Referral Hospital (13.8%), Nekemte Referral Hospital (NRH; 16.1%), Metu Karl Heinz Referral Hospital (16.7%),^{14,16,21,28–30} and in abroad, Mbarara Regional Referral Hospital in Uganda (13.3%),¹⁰ Nanjing First Hospital in China (11.2%),³¹ Tamil Nadu, India (12.2%),³² Timisoara Hospital of Romania (12%),³³ General Hospital in Pakistan (13.6%),³⁴ and a study conducted in Dodoma Regional Referral Hospital, Tanzania (15.5%).³⁵ The variation in magnitude might be due to differences in socio-demographic characteristics of the study setting.

In the current study, the magnitude of UTIs was 2.4 times higher among diabetic females than males. This was based on previous studies conducted in Harar, south Ethiopia, Debre Tabor General Hospital, Arba Minch Hospital, Metu Karl Heinz, and Hawassa University Referral Hospital,^{13,14,16,28,30} Malaysia, Pakistan, and Tanzania.^4,33–35 The higher risk of infection in females might be due to the fact women are vulnerable to UTIs due to their anatomy and reproductive physiology. Short urethra and closer to a perirectal area where pathogen colonizes easier, absence of bacteriostatic prostatic secretions and sexual intercourse may force bacteria into the female bladder.

Based on this finding, patients with DM who had ⩾ 5-year duration of DM being infected by UTIs were two times higher than that of less than 5 years, in line with the study conducted in Romania.³³ This raised risk of UTIs is probably because of concurrent neuropathy.²⁰ In contrary to my finding, a study conducted in Mettu Karl in Ethiopia and Tanzania showed that the duration of DM diagnosis was not statistically associated with UTIs.^16,35 UTIs were 4.8 times more likely in diabetics with comorbidities than in diabetics without comorbidities. This could be because the existence of comorbidities is a sign of illness progression, making patients unable to manage with infections.

According to the current study, khat chewer diabetic patients have a greater risk to get UTIs than those not. This is because khat chewers’ glycemic control is poor due to the effect of a chemical substance found in khat, cathinone on reduction of insulin secretion from beta cells of the pancreas which would elevate the glucose level in the blood and the elevation of glucose level in the blood by activation of glycogenolysis in liver and skeletal muscle. These all are the effect of sympathomimetic actions of cathinone would be expected to rise plasma catecholamine levels.^11,36 Another reason may be because khat chewers are likely to sit for a long time and retain their urine for longer hours.

According to this finding, the prevalence of UTIs in diabetic patients was high, and females, diabetics who had been diagnosed for more than 5 years, patients with comorbidities, and diabetics who chewed khat were more likely to contract UTIs. Because DM patients are more prone to UTIs, it is critical to focus on early detection and treatment. Identifying such characteristics aids health care providers in providing better care to diabetes patients as a whole, as well as nurses in developing evidence-based nursing care that emphasizes prevention.

Limitation of the study

A causal relationship between the independent and dependent variables could not be demonstrated in this cross-sectional investigation. Because only those who visited the diabetes clinic as an outpatient throughout the study period were included in the study, it is possible that this study does not represent the overall population of the Dessie area. Self-reporting was used to collect data on substance usage, which could be skewed by social desirability bias.

Conclusion

UTIs were more recurrent and were likely to undergo a more problematical course in DM patients. According to this study, the magnitude of UTIs among diabetic patients was high. The magnitude of UTIs among DM patients was somewhat comparable with the prior studies conducted in Ethiopia and abroad. Like other similar studies, the increased occurrence of UTIs confirms that uncontrolled DM is significantly associated with more UTIs. Furthermore, this study found that sex, duration of DM diagnosis in years, comorbidity, and khat chewing habit were independent contributing factors for UTIs among diabetic patients. Describing the contributing factors can improve the quality of health care and enable diabetic patients to be mindful of the prevention of UTIs. Health care professionals who are assigned to in diabetic unit of DRH should work on risk factors identification, reduction, and emphasis should be given to diabetic individuals with comorbidity and increased duration of DM diagnosis as well. A further study that includes many hospitals with better study design is recommended to identify specific risk factors.

Supplemental Material

sj-docx-1-smo-10.1177_20503121211060614 – Supplemental material for The occurrence of urinary tract infection and determinant factors among diabetic patients at Dessie Referral Hospital, South Wollo, Northeast Ethiopia

Supplemental material, sj-docx-1-smo-10.1177_20503121211060614 for The occurrence of urinary tract infection and determinant factors among diabetic patients at Dessie Referral Hospital, South Wollo, Northeast Ethiopia by Betelhem Walelgn, Mehd Abdu and Prem Kumar in SAGE Open Medicine

Footnotes

Acknowledgements

The authors have great gratitude to their data collectors, supervisors, and study participants.

Author contributions

B.W. contributed to conceptualization, title and design selection, data analysis, interpretation, and article write-up. M.A. contributed to conceptualization, title and design selection, data collection, analysis, interpretation, and article write-up. P.K. contributed to conceptualization, data analysis, and interpretation. All authors read and approved the final article.

Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.

Declaration of conflicting interests

The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Funding

The author(s) received no financial support for the research, authorship, and/or publication of this article.

Ethical approval

Ethical clearance was obtained from the ethical review committee of the College of Medicine and Health Sciences, Wollo University, with the ethical approval number of CMHS/1291/013/12. A formal permission letter was obtained from the Dessie Referral Hospital administration.

Informed consent

Before data collection, the purpose and importance of the study were explained to each study participant. Informed verbal consent was obtained from the respondents or legally authorized representatives by the consent form approved by the Ethical Review Committee. The confidentiality and privacy of participants were secured by omitting any personal identifier and the participants had full right to withdraw from the study at any time of the study. The study had not any inhumane treatment of research participants and any physical harm, social discrimination, or psychological trauma. The laboratory findings of study participants were communicated with the responsible clinicians assigned at the diabetic clinic and treated accordingly.

ORCID iD

Mehd Abdu

Supplemental material

Supplemental material for this article is available online.

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