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Adherence to Guidelines for Assessment and Empiric Antibiotics Recommendations for Community-Acquired Pneumonia at Ambo University Referral Hospital: Prospective Observational Study

Authors Eticha EM, Gemechu WD

Received 21 December 2020

Accepted for publication 16 February 2021

Published 25 February 2021 Volume 2021:15 Pages 467—473

DOI https://doi.org/10.2147/PPA.S295118

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Johnny Chen


Endalkachew Mekonnen Eticha,1 Workineh Diriba Gemechu2

1Ambo University, College of Medicine and Health Science, School of Pharmacy, Ambo, Ethiopia; 2Jigjiga University, College of Medicine and Health Science, School of Medicine, Jigjiga, Ethiopia

Correspondence: Endalkachew Mekonnen Eticha Email [email protected]

Objective: The high incidence and substantial morbidity and mortality associated with community-acquired pneumonia necessitate an accurate assessment and appropriate management of patients. This observational prospective study aimed to evaluate the physicians’ adherence to the Ethiopian Standard Treatment Guideline for assessment and an empiric antibiotic selection for Community-acquired pneumonia.
Results: The study indicated that the pneumonia severity assessment tool, CURB-65 score, was never used. Of 141 patients referred to an admitting diagnosis of severe community-acquired pneumonia, only 50 were subsequently found to satisfy the guideline criteria, over-diagnosis of 41.9%. Large proportions of the participants (130, 60%) were prescribed antibiotics in the last three months. The most commonly prescribed single antibiotic was Ceftriaxone (47, 21.7%), while ceftriaxone plus azithromycin was the most common combination, 110 (50.7%). In general, the extent of non-adherence to the national guideline for the use of antibiotics was 36.4%. In conclusion, the use of CRB65 scores was uncommon in the study setting. Poor adherence to Ethiopian Standard Treatment Guideline regarding the decision of hospital admission (41.9%) and the antimicrobial selection (36.4%) was determined.

Keywords: standard treatment, adherence, empiric antibiotics, community-acquired pneumonia

Introduction

Infectious Disease Society of America (IDSA) defined pneumonia as the presence of “new lung infiltrate plus clinical evidence that the infiltrate is of an infectious origin, which include the new onset of fever, purulent sputum, leukocytosis, and decline in oxygenation”.1 Hospital-Acquired Pneumonia (HAP) is defined as a pneumonia not incubating at the time of hospital admission and occurring 48 hours or more after admission.1 Ventilator-Associated Pneumonia (VAP) is defined as a pneumonia occurring >48 hours after endotracheal intubation.1 The most frequent causative micro-organisms reported in HAP/VAP were Enterobacteriaceae, S.aureus, p.aeruginosa and A.baumannii, and polymicrobial cases.2 Some pathogens, like Stenotrophomonas maltophilia has emerged as an important pathogen associated with significant mortality in pneumonia and bacteremia of severely immunocompromised, hospitalized patients.3

Community-acquired pneumonia (CAP) is an infection of the lung parenchyma, acquired in the community.4 In the western countries, CAP occurs in approximately 5.6–6.11 per 1000 of the adult population per year.5 The most common etiologic agents responsible for CAP include Streptococcus. Pneumonia, Mycoplasma Pneumonia, Chylamidial. Pneumonia, or respiratory viruses.5 CAP is a significant cause of morbidity and mortality4 and associated with a considerable economic burden on the health care system.6 The combination of high incidence and substantial financial costs necessitates accurate diagnosis and appropriate management of patients diagnosed with CAP.4

Accurate diagnosis and appropriate prescribing and use of antibiotics is important for mitigating antibiotics resistance crisis.4 When infections can no longer be treated by first-line antibiotics due to microbial resistance, more expensive medicines must be used. A longer duration of illness and treatment, often in hospitals, increases health care costs as well as the economic burden on families and societies. It also puts the achievements of modern medicine at risk. Organ transplantations, chemotherapy and surgeries such as caesarean sections become much more dangerous effective antibiotics for the prevention and treatment of infections.7–10

The World Health Organization (WHO) identifies vaccination and case management as the most effective guidelines for the management of patients with CAP. These have been demonstrated to reduce mortality and morbidity11–13 and shorten the length of hospital admission.14,15 Several studies indicated that implementation of treatment guidelines and maintained adherence, reduce morbidity, mortality and health care costs.14,16,17 Guidelines can direct and standardize disease management, but the effects on disease outcomes are less measurable.18,19 However, shreds of evidence suggest that national guidelines on the management of patients with CAP are often poorly adhered to in clinical practice.14,16,20,21 This article discusses the adherence to the Ethiopian Standard Treatment Guideline (ESTG)22 in the Ambo University Referral Hospital (AURH).

Methods

Study Area and Period

The study was conducted in AURH which is 126 km from the capital city Addis Ababa, Ethiopia. The hospital provides services for approximately greater than 20,000 populations annually with a total of 250 beds. The study was conducted from January to April 2019.

Study Design and Study Participants

An observational prospective study was conducted on consecutive adult patients (aged ≥15 years) diagnosed for CAP in the study settings. The decision for hospitalization is independent of the authors and it was a decision of attending physicians.

Patients with aspiration pneumonia, hospital-acquired pneumonia, exacerbations of chronic pulmonary diseases, patients diagnosed with pulmonary tuberculosis (TB) and immunocompromised were excluded from the study. Patients not prescribed antibiotics on the first day of admission were also excluded. Patients were diagnosed for pneumonia depend on the ESTG for General Hospitals22 and physicians clinical judgment.

Data Collection Instruments and Techniques

The diagnosis of CAP relies on the presence of selected clinical sign and symptoms and investigations. ESTG22 suggests the use of CURB-65 (C-confusion; U-uremia or blood urea nitrogen (BUN); R – respiratory rate; B – Blood pressure and age greater than 65) score to classify the severity and determines hospitalization. However, due to the lack of laboratory result for BUN from patients’ medical record, we modified CURB-65 to CRB-65 score instead. Each variable has one point and evaluated out of 4 points. A patient with CRB-65 score less than or equal to 1 point is treated as outpatients. If the score is greater than 1 point, the patient needs hospitalization. A Patient with high score of a CURB-65 has high risk of mortality.4,22

A structured questionnaire was used to record the relevant data for eligible patients. The data collection tool was provided in Supplementary file 1. The first assessment of the patients started on the first day of hospital admission. The 2nd and 3rd assessments were over 48 hours of admission and on the day of discharge, respectively. The socio-demographic data of the enrolled patients were collected at assessment 1 and includes age, sex, marital status, and occupational status. The following parameters were recorded on admission and re-assessment periods: clinical signs (body temperatures, heart rate, respiratory rate and arterial blood pressure) and symptoms, partial oxygen saturation, radiographic (chest X-ray, CXR), and antibiotic regimens. Microbiological data were also recorded from the patients’ medical records.

Antibiotics were received after diagnosed for CAP. The ESTG22 recommends an empiric therapy of macrolides or doxycycline antibiotics for mild CAP (ambulatory patients) with no history of antibiotic use within the last 3 months. If prior antibiotics use within the last 3 months, combinations of macrolides plus amoxicillin or amoxicillin-clavulanate were recommended. For severe CAP, empiric antimicrobial therapy of advanced cephalosporin’s (3rd or 4th generations) or benzylpenicillin in combination with macrolides was initiated. All empiric regimens are subject to modification on the arrival of microbiological results and other evidence. De-escalation to narrow-spectrum antibiotics and oral regimens are always encouraged in the appropriate circumstances.

The antibiotic prescribed during the first 24 hours of hospitalization was considered to be the initial treatment. Prior antimicrobial regimen received for the current diagnosis in the outpatient setting was also recorded. All initial empirical antimicrobial therapy, whether or not adhering to the guideline, was recorded. Antimicrobial regimen was defined as ESTG adherent when the antibiotics chosen by the physician followed the recommendations included in the 2014 ESTG22 regardless of any additional antibiotics received. The physicians were also called adherent to the guideline if they decided patients hospitalization and discharge using CURB-65 criteria.

Data Processing and Analysis

The collected data were cleaned, edited, categorized, entered and analyzed into software for Statistical Package for Social Science (SPSS) version 20. Proportions’ were calculated using descriptive analysis. The results were displayed by using tables for simple interpretation and understandings.

Results

Socio-Demographic Characteristics

An observational prospective study of 217 CAP patients consecutively admitted to AURH was conducted from January to April 2019. Of the total patients, 55.3% were females and 74.7% were less than 65 years of age. The median duration of hospital stay was 4 days. Of the total study patients, 8.3% and 43.3% of them had an altered mental status and RR ≥ 30 at presentation, respectively, as shown in Table 1. All of the patients had no documented blood urea nitrogen (BUN) result.

Table 1 Socio-Demographic and Clinical Characteristics of CAP Patients Admitted to AURH from January to April 2019

Of all, 141 (65%), 84 (38.7%) and 15 (6.9%) patients were tested for baseline O2 saturation, sputum gram stain and sputum bacterial culture, respectively. Large number of patients (141, 65%) were diagnosed with severe pneumonia and hospitalized. A total of 130 (60%) patients had a previous history of antibiotic use within the last three months. Microbiology and drug susceptibility test data were not available in medical records. This is not unexpected for resource-limited settings in which empiric therapy is the most common practice.

None of the patients were assessed using a CRB-65 score, which is indicated in ESTG20 to determine pneumonia severity and subsequent management. According to the severity score, 167 (77%) patients had mild CAP and should be treated as an outpatient. In contrast, 141 (65%) patients were hospitalized for severe CAP and 76 (35.0%) were treated as outpatient management according to the physician’s diagnosis. Of 141 patients diagnosed for severe CAP, only 50 were subsequently found to satisfy the criteria of the guideline, an over-diagnosis of 41.9%.

Empiric Antibiotics Prescribed to Patients with Community-Acquired Pneumonia

Based on our assessment, many of the antimicrobial regimens used in our hospitals are not consistent with ESTG and are excessively broad spectrum. Six different antibiotic regimens were prescribed for CAP patients as indicated in Table 2. Ceftriaxone was the most commonly prescribed single antibiotics, 47 (21.7%), while ceftriaxone plus azithromycin was the most common combination, 110 (50.7%).

Table 2 Empiric Antibiotic Prescribed for Patients Admitted to AURH for CAP from January to April 2019

Regarding antibiotic selection, 79 (36.4%) prescriptions were inappropriate. Of these, 42 (19.4%) prescription of ceftriaxone alone or in combination with azithromycin unnecessarily over-prescribed. Similarly, 6 of co-amoxiclav plus clarithromycin and 2 of amoxicillin plus azithromycin combination were over-prescribed. Under-treatment was associated with poor treatment outcome, but such a trend was not apparent in the current study.

Discussion

To our knowledge, this is the initial study in Ethiopia that investigates the adherence of physicians to national standard treatment guidelines for diagnosis and treatment of pneumonia. CAP is a common diagnosis and results in significant health care costs, mostly for patients who require hospitalization17,23 and it is one of the most common infections antibiotics are prescribed.

The study indicated that adherence to CAP guidelines and the use of severity scores for the decision of hospital admission was poor. Although the ESTG22 and other CAP management guidelines, such as the Infectious Disease Society of America4 have available to physicians, this study shows no recordings of the CAP severity score using the CRB-65. Studies reveal that the documented use of a pneumonia severity score is extraordinarily low (5%).24,25 Besides, several studies showed a very poor recording of the CAP severity score.18,20,26 Assessing the CURB-65 score helps physicians to classify patients and select appropriate antimicrobial therapy concerning the patient site of care. Pneumonia severity scores have been demonstrated to improve care for patients with CAP by providing independent predictors of disease severity.27 Implementation strategies28 are needed to achieve higher adherence rates for the benefit of patient safety and health economy.

The current study shows, 41.9% of patients were over-diagnosed and hospitalized for severe pneumonia according to ESTG. One study has shown that between 50% and 78% of patients with CAP may be hospitalized unnecessarily when the CURB-65 score is not being used.29 The cost of inpatient care for CAP is approximately greater compared to the outpatient setting. Therefore, high levels of non-compliance to ESTG by our physicians may have an important financial impact on the national healthcare system. Apart from the cost, hospitalization also increases the risk of thromboembolic events and super-infection by more drug-resistant hospital pathogen.30

Adherence to empiric antibiotic guidelines for the management of patients with CAP has been demonstrated to reduce mortality and morbidity,11,12 shorten the length of hospital stay14,15 and decrease health care costs.17 Appropriate antibiotic prescription in hospitals ensures effective treatment of patients and administration of appropriate antibiotics within 4–8hrs is associated with 5–43% relative reduction of mortality.31,32 However, we found that 36.4% of the empiric antibiotic prescriptions did not adhere to our national treatment guideline. Inline with the current study; there are shreds of evidence to suggest that empiric antibiotic guidelines on the management of patients with CAP often poorly adhere to clinical practice.14,16–21

Over 72.4% of patients diagnosed with a primary CAP were prescribed ceftriaxone alone or in combination with azithromycin. Of these, 19.4% of the prescriptions were over-prescribed for mild CAP. One study shows over 92% of CAP patients were prescribed ceftriaxone in the hospital.24 A study demonstrated that the use of broad-spectrum cephalosporins in patients with mild-moderate CAP contributed to many discordant prescribing episodes.27 Similarly, other studies have produced a concern that the use of third-generation cephalosporins is discordantly high and not in keeping with national and hospital guideline.24,33 These increase the financial cost of healthcare and impact the economy of the consumer. Also, the widespread use of third-generation cephalosporin (eg ceftriaxone) results in significant ecological adverse effects, specifically, the selection of drug-resistant organisms and the development of colonization or infection with multidrug-resistant bacteria.34

Some studies revealed possible barriers and challenges for poor adherence of healthcare professionals to treatment guideline.35 Models were developed to suggest that physicians fail to adhere to guidelines in the presence of an internal barrier that a cognitive (awareness or knowledge) or affective (attitude or motivation) component, or in the presence of an external barrier (patient, guideline and environmental factors) that restricts the professionals’ ability.36–38 Implementation science indicates that factors determining healthcare professionals (HPs’) adherence to treatment guideline can be linked to both individual, team and organizational level and are related to the context where the treatment and care is performed.39 While several studies describe barriers to guideline implementation, there is only little practical advice on how they should be translated into clinical practice-changing strategies.40

In conclusion, the pneumonia severity assessment tool was not used to guide treatment and antibiotics prescribing. The study indicated that adherence to CAP guidelines regarding the decision of hospital admission and the antibiotic selection was poor. Large proportions of the patients were unnecessarily hospitalized and over-prescribed broad-spectrum antibiotics. This may creates additional burden despite the increased focus on an antimicrobial stewardship program in Ethiopia. Further work is required to assess the feasibility and barriers to the use of national guideline in Ethiopian hospitals.

Limitations

We acknowledge the limitations of the current study, including 1) the estimates were based on one point in time observation completed in the three-month duration; 2) the pharmacists and the authors were not included in the antibiotic selection and it was the responsibility of the physician; 3) the study was not multi-sectoral observational studies.

Abbreviations

IDSA, Infectious Disease Society of America; CAP, community-acquired pneumonia; HAP, hospital-acquired pneumonia; VAP, ventilator-associated pneumonia; WHO, The World Health Organization; AURH, Ambo University Referral Hospital; ESTG, Ethiopian Standard Treatment Guideline; CURB-65, C-confusion; U-uremia or blood urea nitrogen (BUN); R-respiratory rate; B-Blood pressure and age greater than 65.

Data Sharing Statement

All relevant data are within the paper. The SPSS data of individual patients are not permitted to be provided to other bodies, as indicated on ethical clearance. However, researchers who need further clarification can obtain anonymized data from the corresponding author on reasonable request.

Ethics Approval and Consent to Participate

The study was conducted as per the declaration of Helsinki. Ethical clearance to conduct this study was secured and obtained from the ethical review board of the College of Medicine and Health Sciences of Ambo University with reference number AU/CHMS/SP/3025/2019. Participants were provided with an explanation of the study objective and were included in the study after written consent was obtained. The confidentiality of the study participants was maintained by assigning unique study identifiers during data collection and analysis.

Acknowledgments

The authors acknowledge Ambo University Referral Hospital for accessing the data. We were also grateful for the data collectors and supervisors for the carefully undertaking of their tasks.

Author Contributions

All authors made a significant contribution to the work reported, whether that is in the conception, study design, execution, acquisition of data, analysis and interpretation, or in all these areas; took part in drafting, revising or critically reviewing the article; gave final approval of the version to be published; have agreed on the journal to which the article has been submitted; and agree to be accountable for all aspects of the work.

Funding

No funding was received.

Disclosure

The authors declare that they have no conflicts of interest for this work.

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