Antimicrobial-associated Organ Injury among the Older Adults: A Systematic Review and Meta-Analysis

DOI: https://doi.org/10.21203/rs.3.rs-342681/v1

Abstract

Background:  Older adults (aged 65 years and above) constitute the fastest growing population cohort in the western world. There is increasing evidence that the burden of infections disproportionately affects older adults, and hence this vulnerable population is frequently exposed to antimicrobials. There is currently no systematic review summarising the evidence for organ injury risk among older adults following antimicrobial exposure. This systematic review and meta-analysis examined the relationship between antimicrobial exposure and organ injury in older adults.  

Methodology: We searched for Psych INFO, PubMed, and EMBASE databases for relevant articles using MeSH terms where applicable. After removing duplicates, articles were screened for inclusion into or exclusion from the study by two reviewers. The Newcastle-Ottawa scale was used to assess the risk of bias for cohort and case-control studies. The Cochrane collaboration's tool for risk of bias (version 2) was used to assess the risk of bias for randomised control trials. We explored the heterogeneity of the included studies using the Q test and I2 test and the publication bias using the funnel plot and Egger's test.   

Results: The overall absolute risks of acute kidney injury among older adults prescribed aminoglycosides, glycopeptides, and macrolides were 15.1%, 19.1%, and 0.3%, respectively. Only 3 studies reported antimicrobial associated drug-induced liver injury. Studies reporting on the association of organ injury and antimicrobial exposure by age or duration of treatment were too few to meta-analyse. The funnel plot and Egger's tests did not indicate evidence of publication bias.

Conclusion: Older adults have a significantly higher risk of sustaining acute kidney injury when compared to the general adult population. Older adults prescribed aminoglycosides have a similar risk of acute kidney injury to the general adult population.

Introduction

Older adults aged 65 years and above comprise the fastest and largest expanding population age group in the developed world (1). They are prone to infectious diseases such as pneumonia, skin and soft tissue infections (SSTI), urinary tract infections (UTI) and septicaemia when compared to younger people (1). It is estimated that the older adults comprise 48.7% of individuals admitted to hospital intensive care units for these infections (2), resulting in their increased length of hospital stay and exposure to antimicrobials. Giarratano et al. (3) highlighted several predisposing factors that make older adults more susceptible to antimicrobial adverse events. These include physiological changes, higher comorbidities, drug-drug interactions, drug delivery routes used, and length of time they are in contact or exposed to the antimicrobial agents. In one large prospective cohort study, antimicrobial related adverse events accounted for 19.3% of all drug-related adverse events seen at the emergency department (2). Several antimicrobial-associated adverse events become apparent years after the drug has been approved. The adverse events reported in clinical trials differ considerably from post-marketing surveillance (4). Since most clinical trials exclude older adults, the true nature and incidence of antimicrobial related adverse events in this population are unknown. In their review, Giarratano et al. (3) concluded that there is a general lack of epidemiological studies on antimicrobials used among the older adults, yet this is essential in informing healthcare providers to achieve optimal safety and effectiveness when providing antimicrobial pharmacotherapy to the older adults.

This paper describes a systematic review and meta-analysis carried out to investigate whether antimicrobial exposure is associated with kidney, liver, or tissue injury among older adults. The main outcome was quantifying the association of organ injury among older adults following exposure to antimicrobials. Secondary outcomes were to explore the length of antimicrobial exposure and age on the risk of organ injury. The study also explored the heterogeneity among studies and publication bias.

Methods

Search strategy and selection criteria

For this systematic review and meta-analysis, we searched for original research articles for observational and interventional studies describing kidney, liver or tissue injury associated with exposure to antimicrobials among older adults (65 years or above). We restricted our searches to the English language only for 30 years from1990 to 2020. Studies were excluded if they included adults below 65 years of age; the outcome of interest was not kidney, liver, or tissue injury; the exposure was not an antimicrobial; the study design was not an original observational or interventional study.

We searched Psych INFO, PubMed and Embase databases for relevant articles from 01 January 1990 to 31 January 2020. The full search criteria for both PubMed and Embase are in additional file 1, document 1. TC conducted the searches and carried out the title and abstract screening for preliminary inclusion of studies into the systematic review. PN and SR independently sampled 10% of the articles each for the title and abstract screening. Two reviewers independently conducted the full-text screening. TC and PN reviewed the first 50% of the articles, and TC and SR reviewed the other half. Where there were disagreements between reviewers, the opinion of the third reviewer was sought.

Studies were included in the systematic review and meta-analysis if they reported the absolute risk, relative risk, or odds ratio of antimicrobial associated kidney, liver, or tissue injury among older adults. The systematic review was conducted after the study protocol was registered with PROSPERO (CRD4202015262).

Data analysis.

Data extraction was completed by TC and PN independently, using a pre-piloted excel form. Data for the following variables were extracted: author details, country of study, study design, study setting, data source, any condition treated with antimicrobial, inclusion and exclusion criteria, outcome measurement and ascertainment, controlled confounders, sample size, exposure antibiotic, and absolute risk or odds ratio of organ injury among the participants. The full data extraction table is available as additional file 2, document 1.

The Newcastle-Ottawa scale (5) was used to assess the risk of bias for each observational study. Version 2 of the Cochrane risk-of-bias tool for randomised trials (RoB 2) (6) was used to assess the risk of bias for randomised controlled trials (see appendix 1 and 2 for the Newcastle-Ottawa scale and RoB2 templates, additional file 4, document 1).

Each study that scored 6 or more points on the Newcastle-Ottawa scale was considered to have a low risk of bias provided it scored at least 3 points on the selection domain, one or more on comparability, and at least 2 points on the outcome domain. All studies considered to be of low risk to bias were further considered for meta-analysis. Heterogeneity among the studies included for meta-analysis was assessed using the Cochrane Q statistic (7) at 5% significance level and quantified using Higgins and Thompson's I2 statistic (7). An I2 value of more than 50% was considered to reflect substantial heterogeneity, and therefore, sensitivity analysis to investigate the possible source of heterogeneity was done. For the meta-analysis results, publication bias was assessed using a funnel plot (8) and Egger's regression test (9). Regardless of the heterogeneity, the random-effects model, using the DerSimonian and Laird method (10), was used to meta-analyse the studies. The meta-analyses were performed using the OpenMetaAnalyst software (11).

Results

Study identification

Following database searching, 1236 studies were identified, of which thirty-three were duplicates. Of the remaining 1203 studies, 1003 studies were excluded following title and abstract screening. A further 176 studies were excluded after the full-text screening, leaving 24 studies in the systematic review (11-35). The full selection process is summarised in figure 1. Six of the included studies had data for two or more antimicrobials (12-17). Each of these data was treated as a separate study, resulting in 34 studies, as shown in table 1 below.

Characteristics of included studies

Out of the 24 studies included for qualitative analysis, twenty-three were cohort studies (11-32, 35), and one was classified as a randomised controlled trial because it used data from two randomised trials (18). Sixteen studies were set on single hospitals (13, 14, 16, 17, 21-24, 26-32, 35), four used primary care data (12, 13, 19, 20), two were population-based (15, 16), one multicentre hospital-based (14), and one multicentre randomised controlled study (18). Six of the studies were carried in the United Kingdom (12, 13, 19-22), four each for China (23-26) and the United States (27-30), two each for Canada (15, 16) and Japan (31, 32), and one each for Australia (33), France (14), Israel (34), Singapore (17), and South Korea (35). The randomised controlled trial (18) was multinational, including nine countries, namely Australia, Benin, Brazil, Canada, Ghana, Guinea, Indonesia, Saudi Arabia, and South Korea. Out of the thirty-four studies included for analysis, 31 reported acute kidney injury (AKI), three reported on drug-induced liver injury (DILI), and none reported on tissue injury. After considering the classes of antimicrobials used, nine, eight and four studies reported on AKI due to aminoglycosides, glycopeptides, and macrolides, respectively. Cephalosporins, penicillin, quinolone, and trimethoprim had a couple of studies, each reporting on AKI, while nitrofurantoin had a single study reporting on AKI. Three studies were on antituberculosis antimicrobials, and they reported on DILI. Table 1 below summarises the main characteristics of all the included studies.

Risk of bias

The Newcastle-Ottawa Scale (NOS) (5) with slight modifications was used to assess the risk of bias for each of the included observational studies. This tool is well validated and commonly used for assessing the risk of bias for observational studies included in a systematic review (36). In this systematic review, the modified tool is shown in appendix 1. Table 2 above summarises the risk of bias for each included observational study. All included cohort studies had a low risk of bias. The only randomised controlled trial included in this review was assessed for risk of bias using the Cochrane risk of bias version 2 (RoB2) tool (37), and it was low.

Outcomes

None of the included studies determined the relative risk of organ injury among older adults using prescribed antimicrobials as exposure of interest and no antimicrobial prescribed as the control. However, 27 studies expressed the absolute risk of organ injury among exposed older adults. Nine studies (14, 17, 21, 22, 27, 33, 34) reported absolute risk of AKI due to aminoglycoside exposure, eight studies (23-26, 28-31, 38) reported absolute risk of AKI due to glycopeptide exposure. Four studies reported the absolute risk of AKI due to macrolide exposure (15, 16). One study for penicillin (32) and trimethoprim (19) also reported an absolute risk of AKI due to exposure to the respective antimicrobial. Only three studies (18, 20, 35) reported an absolute risk of DILI due to antituberculosis antimicrobials. Meta-analyses were done on absolute risks for AKI among older adults who received aminoglycoside, glycopeptide, or macrolide antimicrobials, and the respective attributable risk percentages were determined.

Amino glycopeptides 

A total of 1611 participants were exposed to aminoglycosides, and 257 of them were reported to have developed antimicrobial associated AKI across the nine studies. Figure 2 below, is the funnel plot of the included nine studies showing a high degree of homogeneity. The random-effects model was used to meta analyse the studies to establish the overall risk of AKI among older adults using aminoglycoside antimicrobials. Figure 3 below, is the forest plot of the meta-analysis. The overall absolute risk of AKI among older adults exposed to aminoglycosides was 15.1% (95% CI: 12.5% - 17.7%). This was significantly higher (p < 0.0001) than the average risk of AKI among adults of 18 years and above, following aminoglycoside antimicrobial exposure (10.5%; 95% CI: 10.1% – 10.8%) (39). Therefore, the attributable risk per cent of AKI among older adults exposed to aminoglycosides was 30.5% (95% CI: 6.6% - 54.4%). 

Glycopeptides 

A total of 23,431 participants were included in the eight studies that reported AKI due to glycopeptide exposure among older adults. Figure 4 (additional file 5, document 1) is a funnel plot showing the distribution of the studies when the standard error was plotted against the proportion of cases, and figure 5 (additional file 5, document 1) shows the forest plot before removing outliers, with an absolute risk of 21.4% (95% CI: 17.1% - 25.7%). After performing the leave-one-out meta-analysis, the overall absolute risk reduced significantly (p = 0.017) after excluding the study by Carreno et al. (28). As shown in figure 6 (additional file 5, document 1), excluding other studies did not significantly impact the overall absolute risk of AKI. Figure 7 (additional file 5, document 1) shows the funnel plot following the outlier's exclusion, and figure 8 shows the forest plot for a random-effects model for the studies after removing the outlier. In this systematic review, the overall absolute risk of AKI following the use of glycopeptides is, therefore, 19.1% (95% CI: 15.4% - 22.7%). There is no significant difference (p = 0.117) with the established risk of AKI among adults (18 years and above) on glycopeptide antimicrobial treatment (absolute risk = 18.7%; 95% CI: 15.6% - 21.7%)(40). 

Macrolides 

Only four studies reported on the risk of macrolide-associated AKI, but among them, a total of 294,350 participants were involved. The fixed-effects model was used to analyse these studies. Figure 9 is the forest plot summarising the combined outcome of these four studies. The overall risk of AKI among older adults exposed to macrolides was 0.3% (95% CI: 0.3%-0.3%). 

Drug-induced liver injury (DILI) 

Only three studies, with 404 participants, reported antimicrobial-associated DILI (18, 20, 35). In their study, Noh et al.(35) followed up 77 outpatients who were diagnosed and being treated for latent tuberculosis infection (LTBI), of which 14.3% (=11) had raised aminotransferases (the laboratory marker used to determine DILI) due to antituberculosis antimicrobials. All the participants were 65 years or above. Similarly, Bright-Thomas et al.(20) followed up 2070 adults (18 years and above) with active tuberculosis over thirty years (1981 to 2010). A subgroup of two hundred of these patients was 70 years old or more, hence included in this systematic review. Five per cent (n=10) of these patients had raised aminotransferases, an indication of antimicrobial associated DILI. On the other hand, Campbell et al. (18) performed a post hoc safety analysis using data from two parallel, open-label, randomised controlled trials in 17 healthcare facilities from countries across the globe. A subgroup (n=127) of 65 to 90-year-old adults were considered for this systematic review, of which 5.5% (n=7) had antimicrobial associated DILI. All three studies agreed that antimicrobial associated DILI increased with age.

Subgroup analysis 

No studies included in this systematic review investigated the relative risk or odds ratio of organ injury associated with broad-spectrum antimicrobials compared to narrow-spectrum antimicrobials prescribed to older adults. However, three studies in one research (12) and another separate study (19) compared the odds of AKI among older adults when empirically prescribed different antimicrobials for urinary tract infection (UTI) with empirical prescription of nitrofurantoin. In another four studies published in one research paper (13), the odds of AKI among older adults prescribed different antimicrobials following UTI were compared with the odds following amoxicillin prescription. Another five studies each had data on long term compared to short term treatment and an age group comparison of those between 65 and 79 years versus those 80 years and above.

1. Organ injury following empirical antimicrobial prescription for UTI. 

Ahmed et al. (12) and Ahmed et al. (19) carried out several studies to determine the odds ratios of AKI when older adults have prescribed either cephalexin, co-amoxiclav, ciprofloxacin or trimethoprim when compared to nitrofurantoin for UTI. All exposure antimicrobials, except trimethoprim, had similar odds of causing UTI to nitrofurantoin among older adults. Trimethoprim was 1.9 times more likely to be associated with AKI when compared to nitrofurantoin (95% CI: 1.5 – 2.5). Crellin et al. (13) also reported the odds ratios of AKI among the older adults when cefalexin, ciprofloxacin, nitrofurantoin and trimethoprim were compared to amoxicillin. The odds of AKI associated with nitrofurantoin or cefalexin was not significantly different to that of amoxicillin among the older adults (OR = 0.89; 95% CI: 0.65 – 1.24, and OR = 1.01, 95% CI: 0.74 – 1.37, respectively). Ciprofloxacin was 1.48 (95% CI: 1.03 – 2.13) times, and trimethoprim was 1.72 (95% CI: 1.31 – 2.24) times more likely to be associated with AKI among older adults when compared to amoxicillin when prescribed for UTI.

2. Organ injury following treatment duration. 

Among the five studies that included duration of treatment as part of their analysis, three of them (17, 33, 34) compared up to 7days of treatment with aminoglycosides versus more than 7 days, while the other two studies (29, 30) compared short and long term treatments with glycopeptides. In the study by Paterson et al. (33), there was a strong association of AKI among the patients who received an aminoglycoside for more than seven days, with a risk ratio of 7.5 (95% CI: 2.7-20.5, p = 0.0001), when compared to those treated for seven or fewer days. Contrary, in both of their studies, Ong et al.(17) and Raveh et al.(34) found no association of risk of AKI among those who received an aminoglycoside for more than 7 days, when compared to 7 or fewer days of treatment, with relative risks of 0.99 (95% CI: 0.58-1.68) and 1.35 (95% CI: 0.68-2.68) respectively. Similarly, Gyamlani et al.(29) and Hall et al. (30) did not find any association between the risk of AKI among those who received long term glycopeptide treatment compared to short term treatment.

3. Organ injury according to age group 

Three of the five studies determined the association of AKI due to glycopeptide treatment among those at least 80 years when compared to those between 65 and 79 years (25, 28, 30). According to Pan et al.(25), there was a significant association of AKI among those at least 80 years old and on glycopeptide therapy when compared to those between 65 and 79 years of age, with a relative risk of 2.3 (95% CI: 1.5-3.8, p = 0.0004). However, the studies by Hall et al. (30) and Carreno et al.(28) did not show any significant association of older age with AKI due to glycopeptide therapy. Similarly, both Bright-Thomas et al.(20) and Noh et al.(35) did not find any significant association of older age with DILI due to antituberculosis antimicrobials, with respective relative risks of 1.52 (95% CI: 0.44-5.19) and 1.18 (95% CI: 0.18-7.75).

Heterogeneity and publication bias 

The included aminoglycoside studies were tested for heterogeneity and the Q-test was 11.43 (p = 0.1787), and I2 was 29.98% (95% CI: 0.00% - 67.58%). Figure 2 (above) is the funnel plot of the included nine studies showing a central and uniform distribution of both and large around the mean. The Egger’s regression test intercept was -0.3626 (p = 0.7031).

The funnel plot for studies on glycopeptide exposure (figure 4, additional file 5, document 1) was skewed to the right, with one study possibly an outlier. Figure 5 (additional file 5, document 1) is the forest plot before sensitivity analysis, with an absolute risk of 21.4% (95% CI: 17.1% - 25.7%). After performing the leave-one-out meta-analysis, the overall absolute risk reduced significantly (p = 0.017) after excluding the study by Carreno et al. (16). As shown in figure 6 (additional file 5, document 1), excluding other studies did not significantly impact the overall absolute risk of AKI. The Q – test was 39.08 (p < 0.0001) and the I2 test was 84.65% (95% CI: 70.15% - 92.10%). The funnel plot (figure 7, additional file 5, document 1) was skewed, and Egger's regression test intercept was 2.2664 (p = 0.0340).

Discussion

This is the first systematic review with meta-analysis to investigate kidney, liver, and tissue injury associated with antimicrobial exposure among older adults 65 years and above. This systematic review's primary outcome of interest was to determine the overall relative risk of organ injury among older adults who received antimicrobial therapy compared to those who did not receive any antimicrobials. However, we found out that no studies attempted to determine either the relative risk or odds ratio of AKI among older adults when exposure to antimicrobials was compared to no antimicrobial exposure at all. Most of the studies included in our systematic review expressed the risk of kidney or liver injury following exposure to certain antimicrobials.

Antimicrobial exposure and risk of organ injury

In our systematic review, older adults had a 15.1% (95% CI: 12.5% - 17.7%) risk of developing AKI following exposure to aminoglycosides. Several reviews and original research studies have found a wide variation of AKI risk among patients prescribed these antimicrobials. Selby et al. (41) found a 24.4% risk of AKI among hospitalised patients associated with increased mortality. Oliveira et al. (42) found the prevalence of AKI among intensive care unit patients prescribed aminoglycosides to be as high as 58% and associated with increased mortality. On the lower end, Paquette et al. (43) found the risk of AKI from aminoglycoside exposure to be 12% after excluding children, seriously ill patients, and patients treated for less than five days. In a large study of 8270 participants, Fuhrman et al. (44) found the incidence of AKI associated with aminoglycosides to be only four per cent. Oliveira et al. (42) argued that this huge variation in prevalence is due to varying study population characteristics. However, the majority of published literature estimates the prevalence to be 10% to 20%. In their systematic review and meta-analysis, Hayward et al. (39) found a 10.5% incidence of AKI among adults of 18 years to 95 years of age, from a total of 24107 non-intensive care patients. Using this systematic review as our reference, we concluded that older adults are at significantly higher risk of AKI when prescribed aminoglycosides (p < 0.0001), with attributable risk from 6.6% to 54.4%.

In our systematic review, glycopeptides were associated with a 19.1% (95% CI: 15.4% - 22.7%) risk of AKI among older adults. Gyamlani et al. (29) noted that AKI incidence due to glycopeptide exposure varies between 5% and 43%, depending on population and baseline risk factors. In their study, Gyamlani et al. found a 10.4% incidence of AKI among patients prescribed glycopeptides. In another study, Fuhrman et al. (44) found out that 17% of adults prescribed glycopeptides developed AKI during or post-exposure. In their systematic review and meta-analysis, Sinha Ray et al. (40) found the incidence of AKI among adults 18 years and above to be 18.7% (95% CI: 15.6% - 21.7%). Using this study as our baseline, there was no significant difference with older adults' findings (p = 0.117). We, therefore, concluded that older adults of 65 years and above have a similar risk of developing AKI when prescribed glycopeptides as the general adult population of 18 years and above.

Only 0.3% of AKI was associated with macrolides to older adults in our systematic review. This is a rare outcome; therefore, there are not many studies done to explore this relationship. Similarly, we only found three studies that reported antimicrobial associated DILI among older adults. The number of studies was too small to perform a meaningful meta-analysis. However, the three studies had an average of 8.27% risk of antimicrobial associated DILI among older adults. Although fewer studies report antimicrobial-associated DILI among older adults, several studies have been reported on the general adult population. In a Swedish study, 27% of DILI was attributed to antimicrobials (45). Similar studies were also done in Spain (46), India (47) and the United States of America (48) and found 32%, 65%, and 45 % of DILI associated with antimicrobials, respectively. Several antimicrobials have been implicated, but most commonly were amoxicillin-clavulanic acid (46, 48), erythromycin (49) and nitrofurantoin (48).

Antimicrobial exposure and risk of organ injury by the duration

In our systematic review, the three studies that reported on the association of AKI with aminoglycoside treatment duration did not agree with their findings. Paterson et al. (33) found a relative risk ratio of 7.5 when patients were prescribed aminoglycosides for more than 7 days compared to those less than 7 days. However, Raveh et al. (34) reported an increased risk of AKI when aminoglycoside treatment was prolonged to 11 days and above. However, Selby et al. (41) did not find any association between AKI and treatment duration.

Antimicrobial exposure and risk or organ injury by age

We did not find any studies that assessed the association of aminoglycoside prescription with AKI by age group. However, some authors have found an increased risk of AKI with age from the general adult population (41). Only one (25) out of the three studies in our systematic review showed a significant association of age with AKI following glycopeptide prescription to older adults. In their systematic review, van Hal et al. (50) found out that AKI risk following glycopeptide prescription increases with age if patients are exposed for more than seven days.

Heterogeneity and publication bias

In our systematic review, we used the random-effects model to summarise the risk of AKI among older adults prescribed aminoglycosides and glycopeptides. Several authors, for example, Ioannidis (51) and Huedo-Medina et al. (52), decide on whether to use a fixed-effect or random-effects model based on heterogeneity results. However, we chose our model before heterogeneity testing, based on Borenstein et al. (53) 's recommendations and further supported by Spinelli and Pandis (53). Our studies were drawn from across the globe and were carried out under different conditions, so we assumed they were not identical. In this instance, heterogeneity testing helped us determine whether these studies have enough in common to be meta-analysed (53). We also used the funnel plot (8) and Egger's regression test (9) to assess our studies' publication bias. We meta-analysed nine studies on aminoglycosides and seven studies on glycopeptides.

Strengths of our study

The study focused on older adults aged 65 and above, who are usually underrepresented in randomised controlled trials. Real-world data, which is more representative of the older adults prescribed antimicrobials, was used. The quality of each included study was thoroughly assessed on representativeness on study participants, ascertainment of exposure of interest, absence of outcome of interest at the beginning of the study, control of possible confounders including age, gender, and severity of the disease, outcome assessment, and adequacy of follow up for outcome to occur.

Most of the included studies shared some common strengths. All the studies considered a wide range of possible confounders and adjusted for them accordingly in their analyses. Well known and validated tools were used to ascertain the presence or absence of outcomes. For example, the international classification of diseases version 10 (ICD-10) was used by authors whose study settings were primary care or population-based (12, 13, 15, 16, 19). Most hospital-based studies used tools that relied on laboratory markers for organ injury, such as a two-fold rise in serum creatinine or doubling of liver transaminases. Some of the tools used include the acute kidney injury network (AKIN) (16, 21, 23, 28) and kidney disease, improving global outcome (KDIGO) (17, 25, 26). Only three studies (12, 16, 20) did not describe how they determined the absence of outcome of interest at the beginning of their studies.

Limitations of our study

Despite their strengths, the included studies in this systematic review also came with their weaknesses. All the included studies, except five (12, 13, 15, 16, 20), were hospital-based. The general major drawback of using hospitalised patients is the generalisability of the findings (54). Most of our data were obtained from subgroups embedded in larger studies. This led to our data lacking detailed information, for example, gender differences among the older adults, since we relied heavily on limited results from tables or otherwise. 

Conclusion

In conclusion, the findings from this systematic review and meta-analysis suggest that there is a significantly increased risk of AKI among older adults when compared to the general adult population following exposure to aminoglycosides. Our results indicated that the risk of AKI in older adults is 15.1%.  The risk of AKI following exposure to glycopeptides for older adults is similar to that previously found in the general adult population. We did not get enough studies to determine whether age or duration of treatment influences the risk of AKI among older adults. 

Abbreviations

ACEI- Angiotensin converting enzyme Inhibitor

AKI-Acute kidney injury

AKIN – Acute Kidney Injury Network

ARB- Angiotensin II receptor blocker

CKD-EPI – Chronic kidney Disease – Epidemiology collaborator

DILI – drug-induced liver injury

DILI-Drug induced liver injury

ICD-10: International Classification of Diseases version 10

ICU- intensive care unit; BMI- Body-Mass index

KDIGO – Kidney Disease: Improving Global Outcome

LTBI – latent tuberculosis infection

NKF – National Kidney Foundation; CVD – Cardiovarscular disease

NSAID- nonsteroidal anti-inflammatory drug

UTI – urinary tract infection

Declarations

Acknowledgements:

The authors would like to thank Linda Humphreys, the science faculty librarian at, University of Bath, for her immense help in training and supporting article search strategies from various databases.  

Authors' contributions:

TC will serve as the first author of the systematic review and meta-analysis paper. He led all the stages of the development and writing of this script. At the same time, PN and SR supervised and contributed to developing plans for searching, screening, extracting, and writing phases.   

Availability of data and materials:

All data generated or analysed during this study are included in this published article (and its supplementary information files).

Competing interests:

The authors declare that they have no competing interests.  

Consent for publication:

Not applicable 

Ethics approval and consent to participate:

Not applicable 

Funding:

No funding was received for this systematic review and meta-analysis..

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Tables

Due to technical limitations, tables only available as a download in the Supplemental Files section.