Khat (Catha Edulis) as a Risk Factor for Cardiovascular Disorders: Systematic Review and Meta-Analysis

Risk of acute coronary syndrome and relationship with the use of khat and tobacco products in the Jazan region, Saudi Arabia: A prospective case-control study

INTRODUCTION

Previous studies have identified several risk factors for acute coronary syndrome (ACS). This study was intended to examine the potential risk of ACS associated with khat and tobacco use.

METHODS

A case-control study of 344 people (172 cases and 172 controls) was conducted at Prince Mohammed Bin Nasser Hospital in Jazan, Saudi Arabia, from April to September 2019. The cases and controls were matched for age (±5 years) and gender. Data were analyzed using descriptive, inferential, and modeling analyses. We utilized the adjusted odds ratio (AOR) to express the results.

RESULTS

The prevalence of ever khat chewing among all study participants was 29.1%, significantly higher for the cases with ACS than for the control group (43.6% vs 14.5%, p<0.001). Cigarette smokers accounted for 33.4% of the study participants, and 22.1% were ACS cases, which is a significantly higher percentage than the control group. The prevalence of smokeless tobacco was 20.3% among ACS cases and 14.5% among controls, with no statistically significant differences (p>0.05). In the final model, tobacco use was more likely to be reported among cases with myocardial infarction (MI) (AOR=4.58; 95% CI: 1.01-4.73, p<0.05) as was khat chewing (AOR=3.4; 95% CI: 1.55-7.46, p<0.05), after controlling for other traditional risk factors.

CONCLUSIONS

Khat chewing was reported more by those who reported ACS. ACS cases were more likely to be frequent khat users with chewing sessions of five or more days per week. Regular tobacco use was also reported in those who reported ACS, and this increases with the amount of tobacco used. Implementing early intervention strategies can help mitigate the impact of khat chewing and smoking on the development of ACS.

Exploring the perception of key stakeholders toward khat policy approaches in Ethiopia: a qualitative study

BACKGROUND

Khat is an amphetamine-like plant, produced and commonly chewed in Ethiopia by a large group of the population. Although significant multidimensional harms of khat use have been reported, currently, there are no policies or organized activities against khat use in Ethiopia. Therefore, the current study aimed to explore the perception of key stakeholders toward khat policy approaches for Ethiopia.

METHODS

A qualitative study was conducted using focus group discussion (FGD) and in-depth interview (IDI). Ten stakeholders participated in the IDIs, and another 15 individuals participated in the FGDs. Key stakeholders were appropriately mapped and purposively selected based on their experience related to khat use and khat harm reduction. Interviews and FGDs were led by the study authors and were audio-recorded. The audio-recorded data were transcribed verbatim and then translated into English language. The data were analyzed using thematic analysis approach.

RESULTS

Participants preferred prevention and law regulation measures for khat policy approaches for Ethiopia. Proposed prevention and law regulation measures included regulating the transportation of khat, limiting the minimum age to buy and sell khat, prohibiting khat use at some public places, banning khat advertising and promotion, and imposing excise tax. Individual level khat harm reduction strategies were also proposed to be useful. However, the participants asserted that total khat ban in Ethiopia is not likely to be feasible and acceptable.

CONCLUSION

Prevention, treatment or care for individuals with problematic khat use, law regulation, and harm reduction were preferred approaches by stakeholders for khat policy in Ethiopia instead of total banning.

Stroke in Djibouti

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Sub-Saharan Africa is experiencing an increasing burden of stroke, with current prevalence as high as 1.46 per 1000 population.

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Limited cohort studies exist to profile the epidemiological, clinical and paraclinical characteristics of stroke in this setting.

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Identifying the most at-risk population for ischemic and haemorrhagic stroke can improve approaches for prevention in this setting.

Background

Stroke is a neurological emergency affecting both developed and developing countries. In Djibouti, stroke is the fourth leading cause of death. Our objective was to describe the demographic, clinical, paraclinical profile of stroke in Djibouti and identify the possible underlying risk factors.

Methods

We conducted a cross-sectional multicentre study carried out over a period of 6 months in the medical services of the Soudano-Djibouti military hospital, the General Peltier hospital and the emergency department of the National fund for social security health centre.

Results

A total of seventy patients were included. The mean age was 59.61 years with a male predominance (sex ratio: 2.5) and a statistically significant female-related difference beyond the age of 60 years (p <10⁻³). Cardiovascular risk factors were mainly hypertension (73%), khat chewing (64%) and tobacco use (50%). Khat chewing and tobacco use were associated with a younger age of occurrence of stroke (p=0.020 and p=0.004, respectively). Diabetes mellitus and hypercholesterolemia were found respectively in 30% and 19% of cases, and were more associated with ischemic stroke. Coronary disease (11%), heart failure (3%) and obesity (4%) (significantly associated with the female gender; p= 0,021) were less common. Motor deficits (94%) were the most common clinical manifestations, followed by sensory deficits (51%) and alteration of consciousness (37%). Stroke was ischemic in 61.5% of patients. The most affected territory in ischemic stroke was the territory of the middle cerebral artery, and capsulo-thalamic involvement in haemorrhagic stroke which was significantly associated with the alteration of consciousness(p=0,003).

Discussion

Stroke had primarily modifiable risk factors in Djiboutian patients dominated by high blood pressure, tobacco use and khat chewing especially in the male population under the age of 60 years. These findings could have implications on future preventive measures and a better approach to public health policy.

Impact of khat leaves on glycosylated haemoglobin and lipid profile in healthy individuals in Dire Dawa, Ethiopia

Objective:

The objective of this study is to determine the effect of Catha edulis leaves on glycosylated haemoglobin and lipid profiles in healthy individuals in Dire Dawa, Ethiopia.

Method:

A cross-sectional study was conducted to evaluate the effect of khat leaves on the glycated haemoglobin and lipid profile in the Dire Dawa population. For the study, 100 male subjects (aged ⩾20–⩽40 years) were recruited and divided into two groups, each consisting of 50 subjects: the first group was khat chewing people while the other group was non-khat chewing individuals. Blood samples were collected and tested to evaluate the glycated haemoglobin and lipid profiles.

Results:

The mean glycated haemoglobin value of khat chewers was 5.33% and for non-chewers, it was 5.48%, respectively. Since p value is less than the significance value, the t-test supports the reduction in glycated haemoglobin values in khat chewers. The mean values of total cholesterol, and triglycerides in khat chewers are 175.2 and 172.92, and for non-chewers they are 168.7 and 164.56, respectively.

Conclusion:

From this study, we concluded that Catha edulis leaves have a significant effect on glycosylated haemoglobin levels. Mean glycated haemoglobin values of long-term healthy khat chewers are comparatively less than healthy non-chewers. Long-term khat chewing increases total cholesterol levels and triglycerides levels but there is no significant effect on the high-density lipoprotein and low-density lipoprotein levels.

A systematic review on risk factors for khat chewing among adolescents in the African continent and Arabian Peninsula

INTRODUCTION

Khat is a flowering plant with stimulant effect on the nervous system and produce psychological dependence. Despite its harmful effects, the ingestion of khat has been part of cultural norms and the legality of khat varies by region.

OBJECTIVE

This systematic review aimed at critically evaluating the available evidence on the risk factors of khat chewing among adolescents.

METHODS

A systematic review was conducted on published research studies from five databases Scopus, PubMed, Science-direct, Ovid and google scholar using keywords khat chewing OR qat chewing AND associated factors OR risk factors OR contributing factors AND adolescents OR teenagers. Articles included were either cross-sectional, cohort, case-control or qualitative studies which were published between the year 1990 till present. Excluded articles were the non-English written articles, descriptive studies and irrelevant topics being studied.

RESULTS

Out of 2617 records identified and screened, six were included for the analysis and interpretation of the data. All included studies were cross-sectional study design. All six studies reported having family members who chewed khat significantly predict khat chewing among adolescents, followed by five articles for friends or peers who also chewed khat and four articles for male gender. Smoking was also found to have the highest odds (OR = 18.2; 95% CI: 12.95-25.72) for khat chewing among adolescents.

CONCLUSION

The review highlights the crucial role of family members, friends or peers and male gender to predict khat chewing among adolescents. Effectiveness of health promotion programs to educate and reduce khat chewing among adolescents will require active participation of family members and friends.

Heavy khat (Catha edulis) chewing and dyslipidemia as modifiable hypertensive risk factors among patients in Southwest, Ethiopia: Unmatched case-control study

BACKGROUND

The burden of hypertension is more devastating in low-and middle-income countries, including sub-Saharan Africa than in high-income countries. Among the modifiable risk factors, dyslipidemia and khat chewing were expanding at an alarming rate in Ethiopia but were still underestimated. Thus, this study aimed to assess heavy khat (Catha edulis) chewing and dyslipidemia as modifiable hypertensive risk factors among patients in the southwest, Ethiopia.

METHODS

A facility-based case-control study was conducted among 136 cases and 270 controls from May 15 to July 30, 2017. A consecutive sampling technique was used in this study. Epi data version 3.1.1 and SPSS version 21 were used for data entry and analysis. Descriptive statistics and bivariate and multivariate logistic regression analyses were performed. Both crude and adjusted odds ratios and 95% confidence intervals were reported.

RESULTS

The majority of the cases had a total cholesterol to high-density lipoprotein ratio of >5 (72.1%). The odds of hypertension increased among participants who had attended no formal education [AOR = 2.25, 95% CI: (1.05-4.82)], history of alcohol consumption [AOR = 5.93,95% CI:(3.11-11.30)], moderate khat chewing [AOR = 3.68, 95% CI:(1.69,8.01)], heavy khat chewing [AOR = 18.18, 95% CI: (3.56-92.89)], mild intensity physical activity [AOR = 3.01, 95% CI: (1.66-5.47)], type of oil used for food preparation [AOR = 2.81, 95% CI: (1.49-5.28)], and dyslipidemia [AOR = 6.68, 95% CI: (2.93-15.23)].

CONCLUSION

The study showed that modifiable risk factors were the major factors associated with the development of hypertension. The findings of this study highlighted that health education is needed to focus on physical exercise, quitting excess alcohol consumption, quitting khat chewing by giving special emphasis to those who had no formal education. In addition, consideration should be given to a healthy diet free of cholesterol and unhealthy behavior.

Management and 30-Day Mortality of Acute Coronary Syndrome in a Resource-Limited Setting: Insight From Ethiopia. A Prospective Cohort Study

Background: Despite the fact that the burden, risk factors, and clinical characteristics of acute coronary syndrome (ACS) have been studied widely in developed countries, limited data are available from sub-Saharan Africa. Therefore, this study aimed at evaluating the clinical characteristics, treatment, and 30-day mortality of patients with ACS admitted to tertiary hospitals in Ethiopia. Methods: A total of 181 ACS patients admitted to tertiary care hospitals in Ethiopia were enrolled from March 15 to November 15, 2018. The clinical characteristics, management, and 30-day mortality were evaluated by ACS subtype. The Cox proportional hazards model was used to determine the predictors of 30-day all-cause mortality. A p-value < 0.05 was considered statistically significant. Results: The majority (61%) of ACS patients were admitted with ST-segment elevation myocardial infarction (STEMI). The mean age was 56 years, with male predominance (62.4%). More than two-thirds (67.4%) of patients presented to hospital after 12 h of symptom onset. Dyslipidemia (48%) and hypertension (44%) were the most common risk factors identified. In-hospital dual antiplatelet and statin use was high (>90%), followed by beta-blockers (81%) and angiotensin-converting enzyme inhibitors (ACEIs; 72%). Late reperfusion with percutaneous coronary intervention (PCI) was done for only 13 (7.2%), and none of the patients received early reperfusion therapy. The 30-day all-cause mortality rate was 25.4%. On multivariate Cox proportional hazards model analysis, older age [hazard ratio (HR) = 1.03, 95% CI = 1.003-1.057], systolic blood pressure (HR = 0.99, 95% CI = 0.975-1.000), serum creatinine (HR = 1.32, 95% CI = 1.056-1.643), Killip class > II (HR = 4.62, 95% CI = 2.502-8.523), ejection fraction <40% (HR = 2.75, 95% CI = 1.463-5.162), and STEMI (HR = 2.72, 95% CI = 1.006-4.261) were independent predictors of 30-day mortality. Conclusions: The 30-day all-cause mortality rate was unacceptably high, which implies an urgent need to establish a nationwide program to reduce pre-hospital delay, promoting the use of guideline-directed medications, and increasing access to reperfusion therapy.

An updated review on synthetic cathinones

Cathinone, the main psychoactive compound found in the plant Catha edulis Forsk. (khat), is a β-keto analogue of amphetamine, sharing not only the phenethylamine structure, but also the amphetamine-like stimulant effects. Synthetic cathinones are derivatives of the naturally occurring cathinone that largely entered the recreational drug market at the end of 2000s. The former "legal status", impressive marketing strategies and their commercial availability, either in the so-called "smartshops" or via the Internet, prompted their large spread, contributing to their increasing popularity in the following years. As their popularity increased, the risks posed for public health became clear, with several reports of intoxications and deaths involving these substances appearing both in the social media and scientific literature. The regulatory measures introduced thereafter to halt these trending drugs of abuse have proved to be of low impact, as a continuous emergence of new non-controlled derivatives keep appearing to replace those prohibited. Users resort to synthetic cathinones due to their psychostimulant properties but are often unaware of the dangers they may incur when using these substances. Therefore, studies aimed at unveiling the pharmacological and toxicological properties of these substances are imperative, as they will provide increased expertise to the clinicians that face this problem on a daily basis. The present work provides a comprehensive review on history and legal status, chemistry, pharmacokinetics, pharmacodynamics, adverse effects and lethality in humans, as well as on the current knowledge of the neurotoxic mechanisms of synthetic cathinones.

The Impact of Khat (Catha edulis) on Hemodynamics of the Common Carotid Arteries in Regular Khat Chewers: A Case-control Study Using Doppler Ultrasound

Background:

To evaluate the effect of chewing khat on the hemodynamics of the common carotid arteries (CCAs) using Doppler ultrasound imaging.

Methods:

This is a cross-sectional case–control study. Fifty volunteers who were chronic regular khat chewers were selected and compared with healthy nonkhat chewers. They were examined using Doppler imaging with a 7–10 MHz linear transducer. The resistivity index (RI), pulsatility index (PI), peak systolic velocity (PSV), and end-diastolic velocity of the CCAs were determined according to the standard protocol of carotid Doppler ultrasound.

Results:

The RI and PI of the right and left CCAs were significantly higher in khat chewers compared to controls (P < 0.001). The PSV of the right and left CCAs was considerably higher in khat chewers compared to controls (P < 0.001 and 0.04, respectively).

Conclusion:

The Doppler values of blood flow velocity, resistivity, and pulsatility were significantly higher in chronic regular khat chewers compared to nonkhat chewers. Khat is a significant contributory factor for increasing the hemodynamics of the CCAs.

Prevalence of hypertension and its determinants in Ethiopia: A systematic review and meta-analysis

INTRODUCTION

Hypertension is a major public health problem globally and it is a leading cause of death and disability in developing countries. This review aims to estimate the pooled prevalence of hypertension and its determinants in Ethiopia.

METHODS

A systematic literature search was conducted at the electronic databases (PubMed, Hinari, and Google Scholar) to locate potential studies. Heterogeneity between studies checked using Cochrane Q test statistics and I2 test statistics and small study effect were checked using Egger's statistical test at 5% significance level. Sensitivity analysis was checked. A random-effects model was employed to estimate the pooled prevalence of hypertension and its determinants in Ethiopia.

RESULTS

In this review, 38 studies that are conducted in Ethiopia and fulfilled the inclusion criteria with a total number of 51,427 study participants were reviewed. The overall pooled prevalence of hypertension in the country was 21.81% (95% CI: 19.20-24.42, I2 = 98.35%). The result of the review also showed that the point of prevalence was higher among males (23.21%) than females (19.62%). When we see the pervasiveness of hypertension from provincial perspective; the highest prevalence of hypertension was observed in Addis Ababa (25.35%) and the lowest was in Tigray region (15.36%). In meta-regression analysis as the mean age increases by one year, the likelihood of developing hypertension increases by a factor of 0.58 times (β = 0.58, 95% CI: 0.31-0.86, R2 = 36.67). Male sex (OR = 1.29, 95% CI: 1.03-1.61, I2 = 81.35%), age > 35 years (OR = 3.59, 95% CI: 2.57-5.02, I2 = 93.48%), overweight and/or obese (OR = 3.34, 95% CI: 2.12-5.26, I2 = 95.41%), khat chewing (OR = 1.42, 95% CI: I2 = 62%), alcohol consumption (OR = 1.50, 95% CI: 1.21-1.85, I2 = 64%), family history of hypertension (OR = 2.56, 95% CI: 1.64-3.99, I2 = 83.28%), and family history of diabetes mellitus (OR = 3.69, 95% CI: 1.85-7.59, I2 = 89.9%) are significantly associated with hypertension.

CONCLUSION

Hypertension is becoming a major public health problem in Ethiopia. Nearly two out of ten individuals who are older than 18 years living with hypertension. Sex, age, overweight and/or obese, khat chewing, alcohol consumption, and family history of hypertension and diabetes mellitus are statistically significant determinant factors for hypertension in Ethiopia. Primary attention should be given for behavioral risk factors to tackle the alarming increase of hypertension in Ethiopia.

Physical Activity Recommendations for Adults in Yemen

Background: Physical inactivity is one of the most crucial global problems in spite of the approved impact of physical activity in enhancing health and preventing NCDs, osteoporosis and many other diseases. Thus, WHO encouraged the countries to set their own physical activity guidelines based on the international physical activity recommendations, however, many countries do not have their national Physical activity recommendations such as Yemen in Eastern Mediterranean Region.Objectives: To suggest proper physical activity recommendations for adults in Yemen based on physical activity recommendations in different countries in WHO regions particularly the Eastern Mediterranean Region.Discussion: Prevalence of national physical activity guidelines and physical activity factors vary among WHO regions. The absence of physical activity recommendations and statistical data in Yemen is obvious and surveillance using validated tools should be done to assess the recent PA and related factors. However, although Yemen has its own issues such as Khat chewing habit and conflict, it shares many factors with other Eastern Mediterranean Region countries in general and Qatar in particular such as unsupportive physical activity environment and limited outdoor activities for women. Conclusion:  Qatar national physical activity guidelines can be suggested as applicable and affordable guidelines for adults in Yemen. According to Qatar guidelines, adults should do (30–60) min of moderate exercise ≥ 5 days per week or (20–60) min of vigorous exercise for ≥3 days per week and in case of promoting or maintaining weight loss, they should do (50-60) minutes daily exercise. Many studies should be done to assess recent physical activity and related barriers to draw evidence-based physical activity guidelines for adults in Yemen.Background: Physical inactivity is one of the most crucial global problems in spite of the approved impact of physical activity in enhancing health and preventing NCDs, osteoporosis and many other diseases. Thus, WHO encouraged the countries to set their own physical activity guidelines based on the international physical activity recommendations, however, many countries do not have their national Physical activity recommendations such as Yemen in Eastern Mediterranean Region.Objectives: To suggest proper physical activity recommendations for adults in Yemen based on physical activity recommendations in different countries in WHO regions particularly the Eastern Mediterranean Region.Discussion: Prevalence of national physical activity guidelines and physical activity factors vary among WHO regions. The absence of physical activity recommendations and statistical data in Yemen is obvious and surveillance using validated tools should be done to assess the recent PA and related factors. However, although Yemen has its own issues such as Khat chewing habit and conflict, it shares many factors with other Eastern Mediterranean Region countries in general and Qatar in particular such as unsupportive physical activity environment and limited outdoor activities for women. Conclusion:  Qatar national physical activity guidelines can be suggested as applicable and affordable guidelines for adults in Yemen. According to Qatar guidelines, adults should do (30–60) min of moderate exercise ≥ 5 days per week or (20–60) min of vigorous exercise for ≥3 days per week and in case of promoting or maintaining weight loss, they should do (50-60) minutes daily exercise. Many studies should be done to assess recent physical activity and related barriers to draw evidence-based physical activity guidelines for adults in Yemen.

Khat Chewing Effect on the International Normalized Ratio in Patients with Mechanical Heart Valves under Warfarin Therapy

BACKGROUND AND OBJECTIVE

Khat is a plant that contains the alkaloids cathine and cathinone which have some amphetamine-like properties. It is cultivated and it's leaves chewed for their euphoric effect. This study intended to elucidate the effect of khat chewing on blood coagulation by using the International Normalized Ratio (INR) value as a calculable benchmark.

MATERIALS AND METHODS

In this cohort study, 146 patients with Mechanical Heart Valves (MHV) were assessed for two consecutive visits at one-month intervals. For each visit, the date of surgery, the patient's compliance, the dose of warfarin and the INR reading were assessed by the researcher.

RESULTS

Out of 146 patients with MHV, the mean age was 33.72±12.43 years (range, 14-65 years); 82 (56.2%) were female and 64 (43.8%) were male. The results revealed that the mean of absolute INR readings was lower in khat-chewers than non-chewers by average 0.2 on the first and second visits (p = 0.038 and 0.002, respectively).

CONCLUSION

Khat chewing has a significant coagulant effect. There was a significant decrease in the value of INR for khat chewers patients with MHV when compared to non-khat chewers.

The prevalence of left ventricular thrombus among patients with low ejection fraction by trans-thoracic echocardiography

Background and objectives:

Ejection fraction (EF) is a measurement of heart function that reflects the portion of pumped out blood from the filled left ventricle per each heartbeat. The current study aimed to investigate the prevalence of left ventricular thrombus in patients with EF lower than 35% by using Transthoracic Echocardiography (TTE).

Methods:

In this prospective study, 82 cardiac patients underwent TTE procedure in order to assess the presence of left ventricular thrombus (LVT) from January 1^st to December 31st 2017 at the Military Cardiac Centre in Sana’a, Yemen.

Results:

Out of 82 patients enrolled in this study, the mean age was 49.13 ± 14.8 years and 87.8% were male. The mean of EF was 31.16% and LVT was found in 6.1%. The spontaneous contrast was seen in 25.6% of patients indicating strong relationship with low EF (p < 0.001). Among patients with low EF, ischemic heart disease (IHD) was identified in 50%, hypertension in 30.5%, diabetes mellitus (DM) type 2 in 23.2%, and hyperlipidemia 12.2%. Exactly 80% of LVT were detected in IHD patients with dilated cardiomyopathy (DCMP) and 80% of detected LVT were apical in site.

Conclusion:

Cardiac patients with low ejection fraction developed left ventricular thrombosis, and most of the affected patients were ischemic heart disease with dilated cardiomyopathy. Interestingly, spontaneous contrast was found high significantly in these patients, which may reflect the continuous process of thrombus formation.

Antioxidant capacity and biomarkers of oxidative stress in saliva of khat-chewing patients: a case-control study

OBJECTIVES

The aim of this study was to investigate the antioxidant levels and biomarkers of oxidative stress in saliva from khat-chewing patients compared with controls.

STUDY DESIGN

Saliva samples were collected from 51 chronic khat chewers and 46 age- and sex-matched controls. Concentrations of oxidative stress biomarkers (malonyl-dialdehyde [MDA], protein carbonyl, and 8-hydroxy-2'-deoxyguanosine) and antioxidant defense (total antioxidant capacity [TAC], superoxide dismutase, glutathione peroxidase, and catalase [CAT) were analyzed.

RESULTS

Salivary MDA level in the khat users group (45 ± 9.2 nmol/mL) was significantly increased in comparison with controls (13 ± 2.1 nmol/mL; P < .001), but there were no significant differences between the 2 groups regarding the levels of salivary protein carbonyl and oxidized guanine species. Salivary TAC was significantly reduced in khat users (0.25 ± 0.028 mmol/L) in comparison with controls (0.34 ± 0.037 mmol/L). Salivary CAT level was significantly reduced in khat users (6.0 ± 0.47 U/mL) in comparison with controls (7.7 ± 0.43 units/mL; P <.05), but no significant differences were observed between the 2 groups with regard to salivary superoxide dismutase or glutathione peroxidase levels.

CONCLUSIONS

Chronic khat chewing is associated with increased levels of salivary MDA and reduced levels of TAC and CAT among a population of adult men in comparison with non-khat-chewing controls. These findings suggest that the pro-oxidative effect of khat chewing may be a contributing mechanism for various oral diseases associated with khat use, including cancer, periodontitis, and caries.