Factors associated with acute kidney injury (AKI) and mortality in COVID-19 patients in a Sub-Saharan African intensive care unit: a single-center prospective study.

INTRODUCTION: Acute kidney injury (AKI) is a complication of severe coronavirus disease 2019 (COVID-19). Kidney damage associated with COVID-19 could take specific features due to environmental and socio-cultural factors. This study evaluates the incidence of AKI, the associated factors, and mortality in COVID-19 patients in a Sub-Saharan African intensive care unit. METHODS: In a prospective cohort study conducted in the intensive care unit (ICU) of the Centre Médical de Kinshasa (CMK), consecutive patients admitted for COVID-19 were screened for the presence of AKI between 27 March, 2020 and 27 January 2022. AKI was defined according to Kidney Disease Improving Global Outcomes (KDIGO) guidelines. The primary outcome was occurrence of AKI. The secondary outcome was 48 days' mortality and recovery of the renal function at intensive care unit (ICU) discharge. Survival (time-to death) curves were built using the Kaplan Meier methods. Multivariate analyses were performed by logistic regression to identify factors associated with AKI and Cox regression to explore the association between AKI and in-hospital mortality. The significance level of the p-value was set at 0.05. RESULTS: The median(IQR) sequential organ failure assessment score (SOFA) score and mean age of patients (215) including in our cohort were respectively 3(2-4) and 58.9 ± 14.9 years. The incidence of AKI was 28.4% with stages 1, 2, or 3 AKI accounted for 39.3%, 11.5%, and 49.2%, respectively. Hemodialysis was required in 16 out 215 (7.4%) patients. Dyspnea (adjusted odds ratio (aOR):2.27 [1.1--4.57] p = 0.021), SOFA ≥5 (aOR:3.11[1.29-7.53] p = 0.012), AST/ALT ratio (aOR: 1.53 [1.09-1.79] p = 0.015), N/L ratio (aOR:2.09 [1.09-3.20] p = 0.016), mechanical ventilation (aOR: 3.20 [1.66-10.51] p = 0.005) and Amikacin (aOR: 2.91 [1.37-6.18] p = 0.006) were the main factors associated with AKI. Patients with AKI had a mortality rate of 52.5% and 67.2% of the survivors did not recover kidney function at the end of hospitalization. Adjusted Cox regression analysis revealed that COVID-19-associated AKI was independently associated with in-hospital death (HR:2.96 [1.93-4.65] p = 0.013) compared to non-AKI patients. CONCLUSIONS: AKI was present in three out of ten COVID-19 patients. The most significant factors associated with AKI were dyspnea, SOFA ≥ 5, AST/ALT and N/L ratio, mechanical ventilation and Amikacin. AKI has been associated with an almost threefold increase in overall mortality and seven out of ten survivors did not recover kidney function after AKI.

Proportion of thyroid cancer and other cancers in the democratic republic of Congo.

BACKGROUND: Cancer diagnosis is increasing around the world and in the Democratic Republic of the Congo (DRC). The proportion of thyroid cancer has increased over the past three decades. There are very few studies on cancer epidemiology, and in particular on thyroid cancer in the DRC. AIM: To establish the most recent proportion of thyroid cancer in the DRC compared to other cancers. METHODS: This is a retrospective and descriptive study of 6106 consecutive cancer cases listed in the pathological registers of 4 Laboratories in the city of Kinshasa. This study included all cancer cases recorded in the registers between 2005 and 2019. RESULTS: From a sample of 6106 patients, including all cancer types, 68.3% cases were female and 31.7% were male. Breast and cervical cancer were the most common types of cancer in women and, prostate and skin cancer were the most common types in men. Thyroid cancer was sixth in proportion in women and eleventh in men compared to all cancers. Papillary carcinoma was the most common of thyroid cancers. Rare cancers such as anaplastic and medullary thyroid carcinomas had a proportion of 7% and 2%, respectively. CONCLUSION: Newer diagnostic tools led to a surge in cancer diagnoses in the DRC. Thyroid cancer has more than doubled its proportion over the last several decades in the country.

Prevalence of risk and factors associated with obstructive sleep apnea-hypopnea syndrome in an adult population in Kinshasa, Democratic Republic of Congo.

Obstructive sleep apnea-hypopnea syndrome (OSAHS) is an underdiagnosed and lesser known disease in sub-Saharan Africa. We believe that this is the first descriptive and analytical cross-sectional study in Kinshasa (from February 1 to October 31, 2021), which included respondents aged ≥18 years. The study aimed to determine the prevalence of the risk and factors associated with OSAHS. Each participant signed a free and informed consent. Statistical analyses were performed using XLStat 2020 and the Statistical Package for the Social Sciences version 24 for Windows. Odds ratios (ORs) were calculated to determine the degree of association between these variables and a high risk of OSAHS. The significance threshold was p < 0.05 and confidence interval (CI) at 95%. There were 4,162 participants, including 2,287 men (54.9%), with an mean (SD) age of 32 ± 12.6 years. The prevalence of OSAS risk was 17.4% and 7.9% for men and women, respectively. The associated risk factors were male sex (OR 4, 95% CI 3.20-5.54), hypertension (OR 6.7, 95% CI 4.87-9.30), age ≥60 years (OR 8.7, 95% CI 4.07-18.88), obesity/overweight (OR 1.94, 95% CI 1.13-3.78), and excessive daytime sleepiness (OR 2.63, 95% CI 2.05-3.56). The risk of OSAS in Kinshasa is high and it increases with age, male sex, obesity, and hypertension. The Snoring, Tiredness, Observed apnea, high blood Pressure, Body mass index, Age, Neck circumference, and male Gender (STOP-BANG) questionnaire is an easy-to-use tool for diagnostic orientation.

Valeurs de référence de quelques paramètres hématologiques chez les femmes enceintes: étude transversale analytique multicentrique à Kinshasa, République Démocratique du Congo / Reference values of some hematological parameters in pregnant women in Kinshasa: A multicentric analytical cross- sectional study in Kinshasa, Democratic Republic of Congo

Pregnancy is a state characterized by physiological changes. These changes are interpreted by comparison between known reference values, which themselves depend on factors such as ethnicity, environment, diet, age, sex… However, the reference values being used in clinical practice in the Democratic Republic of Congo (DRC) are derived from general populations. Therefore, this study aimed to determine the reference values of hematological parameters among pregnant women in Kinshasa. Methods. This analytical cross-sectional study recruited pregnant women in Kinshasa, DRC from December 2022 to April 2023. The Complete blood count was carried out for all participants using Mindary BC-5150 hematology analyzer. The mean, median, and reference values were determined using SPSS version 23. Results. A Total of 451 healthy pregnant women were enrolled in the study. The participant age range was from 18 to 49 years old, 386 (85.6 %) were married and 152 (33.75) paucipare. The defined Reference values were: RBC : 2,79-4,78 x106/µl , Hb : 10,5-12,7 g/dl, HCT :24,3-38,9 %, MCV : 84,3-99,9 fl, MCH : 25,8-29,8 pg, MCHC : 30,0-36,1 g/dl, WBC : 2,83-10,56 x103/µl , Neutrophils :0,8-7,68 x103/µl , lymphocytes : 0,72-2,83 x103/µl , Monocytes :0,10-1,06 x103/µl , Eosinophils : 0,0-0,32 x103/µl , Basophils : 0,0-0,03 x103/µl , Platelet count :189-322 x103/µl, MPV : 7,9-12,6 fl. Conclusion. Changes were observed in hematological parameters between different trimesters of the pregnancy. Considerable differences were also observed when comparing reference values in the present study to those from studies conducted in other countries.

La grossesse est un état caractérisé par des changements physiologiques. Ces changements sont interprétés par comparaison à des valeurs de référence connues qui dépendent elles-mêmes de l'ethnie, de l'environnement, de l'alimentation, de l'âge, du sexe… Cependant, les valeurs de référence utilisées dans la pratique clinique proviennent de populations générales. La présente étude a visé à déterminer les valeurs de référence des paramètres hématologiques chez les femmes enceintes dans la ville de Kinshasa. Méthodes. Cette étude transversale et analytique a recruté des femmes enceintes à Kinshasa, de décembre 2022 à avril 2023. L'hémogramme a été réalisé chez toutes les participantes sur l'analyseur d'hématologie Mindray BC-5150. La moyenne, la médiane et les valeurs de référence ont été déterminées en utilisant le logiciel SPSS version 23. Résultats. Au total 451 femmes enceintes en bonne santé ont été incluses. La tranche d'âge de participantes était de 18 à 49 ans, 386 (85,6 %) étaient mariées et 152 (33,75 %) paucipares. Les valeurs de référence définies étaient : GR : 2,79-4,78×106/µl , Hb : 10,5-12,7 g/dl, HCT : 24,3-38,9 %, VGÇ : 84,3-99,9 fl, CCMH : 25,8-29,8 pg, TCMH : 30,0-36,1 g/dl, GB : 2,83-10,56 x103/µl , Neutrophiles :0,8-7,68 x103/µl , lymphocytes : 0,72-2,83 x103/µl , Monocytes : 0,10-1,06 x103/µl , Eosinophiles : 0,0-0,32 x103/µl , Basophiles : 0,0-0,03 x103/µl , Plaquettes : 189-322 x103/µl, VPM : 7,9-12,6 fl. Conclusion. Des changements ont été observés dans les paramètres hématologiques entre les différents trimestres. Des différences considérables ont également été observées entre nos valeurs de référence et celles des études menées dans d'autres pays.

Ultrasound performance using the EU-TIRADS score in the diagnosis of thyroid cancer in Congolese hospitals.

The thyroid imaging reporting and data systems by the European Thyroid Association (EU-TIRADS) has been widely used in malignancy risk stratification of thyroid nodules. However, there is a paucity of data in developing countries, especially in Africa, to validate the use of this scoring system. The aim of the study was to assess the diagnostic value of the EU-TIRADS score in Congolese hospitals, using pathological examination after surgery as the gold standard in Congolese hospitals. This retrospective and analytical study examined clinical, ultrasound and pathological data of 549 patients aged 45 ± 14 years, including 468 females (85.2%), operated for thyroid nodule between January 2005 and January 2019. In the present study, only the highest graded nodule according to the EU-TIRADS score in each patient was taken into account for the statistical analyses. So 549 nodules were considered. Nodules classified EU-TIRADS 2 and 3 on the one hand, and, on the other hand, 4 and 5, were considered respectively at low and high risk of malignancy. The sensitivity and specificity of the EU-TIRADS score were calculated. The significance level was set at 5%. Of all patients, 21.7% had malignant nodules. They made 48.4% of the nodules in patients younger than and at 20 years old, and 31.1% in those aged 60 or over. Malignant nodules were more frequent in men than in women (30.9% vs. 20.1%; p = 0.024). Papillary carcinoma (67.2%) and follicular carcinoma (21.8%) were the main types. The malignancy rate was 39.7% and 1.5% among nodules rated EU-TIRADS 4 and 5, and those with EU-TIRADS score 2 and 3, respectively (p < 0.001). The EU-TIRADS score had a sensitivity of 96.6% and a specificity of 59.3%. The ROC curve indicated an area under the curve of 0.862. In a low-income country, a well performed thyroid ultrasound, using the EU-TIRADS score, could be an important tool in the selection of thyroid nodules suspected of malignancy and requiring histopathological examination in the Congolese hospital setting.Trial registration: The research protocol had obtained the favorable opinion of the DRC national health ethics committee no. 197/CNES/BN/PMMF/2020. The data was collected and analyzed anonymously.

[Acceptability of the screening test for COVID-19 in the Brazzaville population]. / Acceptabilité du test de dépistage de la COVID-19 chez la population de Brazzaville.

The COVID-19 pandemic affects populations worldwide without distinction. Large-scale RT-PCR testing was proposed to the populations to promote early diagnosis and management. The absence of publications related to COVID-19/Congo testing justified this study. The purpose of this study was to identify factors associated with the acceptability of the screening test for COVID-19. We conducted an analytical cross-sectional study in subjects over 18 years of age living in Brazzaville from August 18th to 24th, 2020. Data were collected using a self-administered questionnaire. The variables considered included: socio-demographic characteristics, sources of information, knowledge and perception of the disease, acceptance or refusal of voluntary testing for COVID-19. In total, 328 (62.5%) respondents accepted voluntary screening for COVID-19, the average age was 35.9 years. Men predominated in both groups. Subjects who were more accepting of voluntary screening for COVID-19 were those aged 30-50 years; those with a higher level of education and followers of Muslim religion. Lack of perception of disease severity was associated with the refusal of voluntary screening. The level of knowledge of symptoms, the source of information about COVID-19 were not related to the acceptance or refusal of voluntary screening. The main source of information about COVID-19 was the Radio-TV. Fear for test results was the main reason for refusing voluntary screening. Acceptability of the voluntary screening for COVID-19 was related to individual factors, knowledge of symptoms and source of information. Awareness of COVID-19 should be improved.

Factors Associated with Liver Enzyme Abnormalities in HIV-HBV and/or HCV Co-infected Patients in Kinshasa, Democratic Republic of the Congo: Multicenter Cross-sectional Study.

BACKGROUND AND OBJECTIVE: Liver enzyme abnormalities (LEA) are extremely common and sometimes severe in individuals infected with human immunodeficiency virus (HIV), but data for this disorder are lacking in the developing countries. The objective of this study was to identify factors associated with LEA in HIV-hepatitis B virus (HBV)/hepatitis C virus (HCV) co-infected patients in Kinshasa, Democratic Republic of the Congo. METHODS: This cross-sectional analytical study included 180 people living with HIV (PLWHIV) mono-infected or co-infected with HBV/HCV between November 10, 2013 and January 10, 2014 in Kinshasa. Sociodemographic, clinical, biological, serological, and immunological data were analyzed. Levels of serum glutamate oxaloacetate transferase (SGOT) and serum glutamate pyruvate transaminase (SGPT) were determined. Antibody levels were determined using enzyme-linked immunosorbent assay (ELISA). RESULTS: The mean age of patients was 44.2±11.0 years; female sex was predominant (76.7%). Co-infection, mainly with HBV, but also HCV, was found in 43 (23.9%) patients. Elevated liver enzymes were found in 77 (42.8%) of the patients. No difference was found in the rate of liver enzyme abnormalities between patients with HIV mono-infection or HIV co-infection (46.7% versus 30.2%, respectively; P=0.08). Factors associated with LEA were age ≥50 years (adjusted odds ratio [OR] 2.7; 95% CI 1.4-5.5), duration of HIV infection >3 years (adjusted OR 2.7; 95% CI 1.4-5.5), and CD4 T cells count ≤303 cells/mm3 (adjusted OR 2.2; 95% CI 1.1-4.5). CONCLUSIONS: Liver enzyme abnormalities are frequent in patients co-infected with HIV-HBV/HCV as well as in HIV patients without co-infection. Diagnosis is determined based on age, immunodeficiency, and length of illness.

Circulating Proprotein Convertase Subtilisin/Kexin type 9 level independently predicts incident cardiovascular events and all-cause mortality in hemodialysis black Africans patients.

BACKGROUND: Cardiovascular (CV) disease is the leading cause of mortality in patients with end-stage kidney disease (ESKD). The aim of the present study was to determine whether Proprotein Convertase Subtilisin/Kexin type 9 (PCSK9) could be an independent predictor of CV events and all-cause mortality in black African haemodialysis patients. METHODS: We carried out a prospective cohort study of all consecutive hemodialysis (HD) patients between August 2016 and July 2020, admitted in six hemodialysis centers of Kinshasa, Democratic Republic of Congo. Independent determinants of plasma PCSK-9 measured by ELISA were sought using multiple linear regression analysis. Kaplan-Meier's method described the incidence of CV events while competitive and proportional risk models looked for independent risk factors for death at the .05 significance level. RESULTS: Out of 207 HD patients, 91 (43.9%) died; 116 (56.1%) have survived. PCSK9 level was significantly higher in deceased patients compared to survivors: 28.0 (24.0-31.0) ng/l vs 9.6 (8.6-11.6) ng/ml (p <  0.001). Patients with plasma PCSK9 levels in tertile 3 had a higher incidence of CV events and mortality compared to patients with plasma PCSK9 levels in tertile 2 or tertile 1 (p <  0.001). Tertile 3 negatively influence survival rates (26.6%) compared to tertile 2 (54.7%) and tertile 1 (85.3%). Patients in tertile 3 and tertile 2 had a 4-fold higher risk of death than patients in tertile 1. After adjustment for all parameters, competitive risk analysis showed that mortality was 2 times higher in patients with stroke. Similarly, serum albumin < 3.5 g/dL or PCSK9 in tertile 3 were respectively associated with 2 or 6 times higher rates of deaths. CONCLUSION: Elevated plasma PCSK9 level is an independent major predictor of incident CV events and all-cause mortality in black African HD patients.

Impact of adapted physical activity on blood pressure and hypertension control in the militaries of Kinshasa Garrison, Democratic Republic of Congo: A randomized controlled trial

Context and objective. Major handicap for operational conditioning of troops, hypertension requires innovative approaches for its prevention and management. The present study aimed to evaluate the impact of adapted physical activity (APA) on BP level of sedentary soldiers from Kinshasa garrison and the rate of hypertension control in those with high BP. Methods. Open, parallel randomized controlled trial carried out at Camp Lt-Colonel Kokolo (CVEC) from June 2016 to October 2017) in sedentary soldiers (57.6 %, hypertensives) allocated for 8 weeks to APA (n=119) or control (n=110). The randomization procedure used permuted blocks of four consecutive participants. The outcomes were baseline-adjusted betweengroup difference in BP level (all participants), in rate of BP control among hypertensives. Results. At the last available visit in 226 participants (119 vs 107), the baseline-adjusted BP difference between active and control group by intentionto-treat was 5.1 (95 % CI 1.2 -10.8)/3.0 (0.1-6.9) mmHg lower in the active group. The effect of APA was also significant across pre-specified categories of participants based on age, officers' rank, and hypertension status. Among 129 analyzed drug treated hypertensives (68 vs 61), the rate of BP control remained unchanged in the control group (43.8 to 44.3%) but increased (43.5% to 85.3 %) in the active group yielding a baseline-adjusted between group difference of 40.7 (32.2; 49.2) %. The probability to achieve hypertension control was greater (HR: 3.38 [95% CI: 1.48- 4.84] in the active group. PP analysis of 122 soldiers (80 vs 42) with data at all scheduled visits yielded confirmatory results for BP reduction and for hypertension control by APA. The changes in BP were positively correlated with concomitant reductions in heart rate. Conclusion. Exercise training induced a significant BP reduction in sedentary militaries and improved the control rate among those with drug treated hypertension

Predictors of mortality in COVID-19 patients at Kinshasa Medical Center and a survival analysis: a retrospective cohort study.

BACKGROUND: Despite it being a global pandemic, there is little research examining the clinical features of severe COVID-19 in sub-Saharan Africa. This study aims to identify predictors of mortality in COVID-19 patients at Kinshasa Medical Center (KMC). METHODS: In this retrospective, observational, cohort study carried out at the Kinshasa Medical Center (KMC) between March 10, 2020 and July 10, 2020, we included all adult inpatients (≥ 18 years old) with a positive COVID-19 PCR result. The end point of the study was survival. The study population was dichotomized into survivors and non-survivors group. Kaplan-Meier plot was used for survival analyses. The Log-Rank test was employed to compare the survival curves. Predictors of mortality were identified by Cox regression models. The significance level of p value was set at 0.05. RESULTS: 432 patients with confirmed COVID-19 were identified and only 106 (24.5%) patients with moderate, severe or critical illness (mean age 55.6 ± 13.2 years old, 80.2% were male) were included in this study, of whom 34 (32%) died during their hospitalisation. The main complications of the patients included ARDS in 59/66 (89.4%) patients, coagulopathy in 35/93 (37.6%) patients, acute cardiac injury in 24/98 (24.5%) patients, AKI in 15/74 (20.3%) patients and secondary infection in 12/81 (14.8%) patients. The independent predictors of mortality were found to be age [aHR 1.38; 95% CI 1.10-1.82], AKI stage 3 [aHR 2.51; 95% CI 1.33-6.80], proteinuria [aHR 2.60; 95% CI 1.40-6.42], respiratory rate [aHR 1.42; 95% CI 1.09-1.92] and procalcitonin [aHR 1.08; 95% CI 1.03-1.14]. The median survival time of the entire group was 12 days. The cumulative survival rate of COVID-19 patients was 86.9%, 65.0% and 19.9% respectively at 5, 10 and 20 days. Levels of creatinine (p = 0.012), were clearly elevated in non-survivors compared with survivors throughout the clinical course and increased deterioration. CONCLUSION: Mortality rate of COVID-19 patients is high, particularly in intubated patients and is associated with age, respiratory rate, proteinuria, procalcitonin and acute kidney injury.

Frequency and factors associated with proteinuria in COVID-19 patients: a cross-sectional study.

Proteinuria is a marker of severity and poor outcome of patients in intensive care unit (ICU). The objective of this study was to determine the frequency of proteinuria and the risk factors associated with proteinuria in Congolese COVID-19 patients. The present cross sectional study of proteinuria status is a post hoc analysis of data from 80 COVID-19 patients admitted at Kinshasa Medical Center (KMC) from March 10th to July 10th, 2020. The population under study came from all adult inpatients (≥18 years old) with a laboratory diagnosis by polymerase chain reaction (PCR) of COVID-19 were selected and divided into two groups (positive proteinuria and negative proteinuria group). Logistic regression models helped to identify the factors associated with proteinuria. The P value significance level was 0.05. Among 80 patients who tested positive for SARS-CoV-2 RT-PCR, 55% had proteinuria. The mean age was 55.2 ± 12.8 years. Fourty-seven patients (58.8%) had history of hypertension and 26 patients (32.5%) diabetes. Multivariable analysis showed age ≥ 65 years (aOR 5,04; 95% CI: 1.51-16.78), diabetes (aOR 3,15; 95% CI: 1.14-8.72), ASAT >40 UI/L (aOR 7,08; 95% CI: 2.40-20.87), ferritin >300 (aOR 13,47; 95% CI: 1.56-26.25) as factors independently associated with proteinuria in COVID-19 patients. Proteinuria is common in Congolese COVID-19 patients and is associated with age, diabetes, ferritin and aspartate aminotransferase (ASAT).

Thyroid cancer in the Democratic Republic of the Congo: Frequency and risk factors.

BACKGROUND: The prevalence of thyroid cancer is increasing steadily in most countries, partly due to better, earlier diagnosis. However, there is little data for developing countries, where the technical platform is often very limited, especially in Africa. OBJECTIVES: To assess the frequency of thyroid cancer in the Democratic Republic of the Congo (DRC) and to analyze the epidemiological, clinical, and ultrasound risk factors. MATERIAL AND METHODS: This is a multicenter cross-sectional study of 594 patients operated on for a thyroid mass from 2005 to 2019, in 35 centers in the DRC and for whom histopathological analyses were performed. RESULTS: The frequency of thyroid cancers in our cohort was 20%, mostly in patients over the age of 40 (62% of patients). These cancers were mainly diagnosed at the clinical stage, due to the presence of palpable masses. Papillary cancer was the most common (67.2% of patients), followed by follicular cancer (28% of cases). We found a high prevalence of anaplastic cancer (7.6%). These frequencies are probably the consequence of the fact that histopathological analyses are not systematically performed in the DRC, but mostly on tissues that the thyroid surgeons suspect to be malignant. Age ≥60 years, the presence of adenopathies upon palpation or on ultrasound, the solid nature and hypoechogenicity of nodules, the presence of macronodules and calcifications were the factors independently associated with the diagnosis of cancer in the study population. CONCLUSIONS: In this first study performed in the DRC, we have found that thyroid cancer is common. It is mainly detected at clinical stages, with patients over the age of 40 years and women being the most affected. The histopathology distribution differs from that in developed countries, with a lower prevalence of papillary cancer and a higher prevalence of the anaplastic type. In developing countries, it appears necessary to introduce the use of more precise diagnostic tools for thyroid cancer and also, to reinforce the improvement of known, controllable risk factors such as iodine deficiency.

Circulating Proprotein Convertase Subtilisin/Kexin Type 9 Levels Predict Future Cardiovascular Event Risks in Hemodialyzed Black African Patients.

CONTEXT AND OBJECTIVE: Cardiovascular diseases are the leading cause of mortality in patients. In this context, proprotein convertase subtilisin/kexin type 9 (PCSK9) appears to be the new biomarker identified as interfering in lipid homeostasis. This study aimed to investigate the association between PCSK9, dyslipidemia, and future risk of cardiovascular events in a population of black Africans. METHODS: A cross-sectional study was conducted between August 2016 and July 2020 in six hemodialysis centers in the city of Kinshasa, Democratic Republic of the Congo. Serum PCSK9 was measured by ELISA; lipid levels of 251 chronic kidney disease grade 5 (CKD G5) hemodialysis patients and the Framingham predictive instrument were used for predicting cardiac events. RESULTS: Total cholesterol (TC), low-density lipoprotein cholesterol (LDL-c), and triglycerides (TG) were significantly increased in the tertile with the highest PCSK9. By contrast, high-density lipoprotein cholesterol (HDL-c) was significantly decreased in the same tertile. A strong positive and significant correlation was found between PCSK9 and TC, TG, and LDL-c. Negative and significant correlation was observed between PCSK9 and HDL-c. The levels of PCSK9, smoking, overweight, and atherogenic dyslipidemia were associated with future risks for cardiovascular events in univariate analysis. After adjustment, all these variables persisted as independent determinants of future risk for cardiovascular events. The probability of having a cardiovascular event in this population was independently associated with PCSK9 levels. Compared to the patients in the lowest PCSK9 tertile, patients with PCSK9 levels in the middle (aOR 5.9, 95% CI 2.06-17.3, P<0.001) and highest tertiles (aOR 8.9, 95% CI 3.02-25.08, P<0.001) presented a greater risk of cardiac event. CONCLUSION: Increased PCSK9 serum levels are associated with higher levels of TC, LDL-c, and TG and lower levels of HDL-c in black African hemodialysis patients. Serum PCSK9 levels in these patients predict increased risk of cardiovascular events, independent of traditional potential confounders.

Psychological Consequence of the Corona Virus Disease Pandemic in Kinshasa, Democratic Republic of the Congo. A Population-Based Cross-Sectional Survey.

BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic is impacting the mental health of the population, but data on its impact in developing countries are lacking. The purpose of this study is to assess the psychological aspects of the COVID-19 pandemic in the population of Kinshasa. METHODS: This cross-sectional and analytical study included 456 randomly selected respondents in the Ngafani district of the municipality of Selembao during the period from August 1 to October 30, 2020. Socio-demographic data, and data concerning COVID-19 and its impact on mental health, were studied. Anxiety and depression were studied using the Hospital Anxiety and Depression Scale (HADS). RESULTS: The two genders were represented in equal proportions; the patients had a mean age of 40.4±17.2 years with a high frequency of patients aged over 50 years. All had agreed to observe social distancing, but only 36.8% had accepted isolation. Using the HADS, 47.4% had a doubtful anxiety state and 23.7% had a definite anxiety state; 36.8% had a doubtful depressive state and 25% had a definite depressive state. Old age (≥50 years), female gender, lack of occupation, and isolation were independent determinants associated with anxiety and depression. CONCLUSION: The frequency of anxiety and depression during the COVID-19 pandemic was high. Older age, female gender, lack of a profession, and isolation were associated with anxiety and depression.

Prognostic Significance of Abnormal Ankle-Brachial Index Among Long-term Hemodialysis Patients in Kinshasa, the Democratic Republic of the Congo.

OBJECTIVE: Early identification of atherosclerosis using a non-invasive tool like ankle-brachial index (ABI) could help reduce the risk for cardiovascular disease among long-term hemodialysis patients. The study objective was to assess the frequency and impact of abnormal ABI as a marker of subclinical peripheral artery disease (PAD) in chronic hemodialysis patients. METHODS: This was a historic cohort study of kidney failure patients on long-term hemodialysis for at least 6 months. The ABI, measured with two oscillometric blood pressure devices simultaneously, was used to assess subclinical atherosclerosis of low limb extremities. Abnormal ABI was defined as ABI <0.9 or >1.3 (PAD present). Survival was defined as time to death. Independent factors associated with abnormal ABI were assessed using multiple logistic regression analysis. Kaplan-Meier method (log-rank test) was used to compare cumulative survival between the two groups; a P value <0.05 was statistically significant. RESULTS: Abnormal ABI was noted in 50.6% (n=43) of the 85 kidney failure patients included in the study; 42.4% (n=36) had a low ABI, and 8.2% (n=7) had a high ABI. Factors associated with PAD present were cholesterol (adjusted odds ratio [AOR], 1.02; 95% confidence interval [CI], 1.01-1.04; P=0.019), inflammation (AOR, 9.44; 95% CI, 2.30-18.77; P=0.002), phosphocalcic product (AOR, 6.25; 95% CI, 1.19-12.87; P=0.031), and cardiac arrhythmias (AOR, 3.78; 95% CI, 1.55-7.81, P=0.009). Cumulative survival was worse among patients with PAD present (log-rank; P=0.032). CONCLUSION: The presence of PAD was a common finding in the present study, and associated with both traditional and emerging cardiovascular risk factors as well as a worse survival rate than patients without PAD.

Prevalence, Location, and Determinants of Valvular Calcifications in Congolese Patients on Chronic Hemodialysis: A Multicenter Cross-Sectional Study.

Valvular calcifications (VCs) are one of the major cardiovascular complications in patients on chronic hemodialysis (HD) due to its prevalence and predictive morbidity and mortality. The current study assessed the prevalence, location, and risk factors of VC among chronic HD Congolese patients in Kinshasa. This observational study involved three HD centers in Kinshasa between March and August 2016. Consecutive consenting adults on maintenance HD for at least six months were recruited. VCs were defined as a luminous echo on one or more cusps of the aortic or mitral valve. Risk factors of VC were determined by multivariate analysis. Sixty patients (mean age: 52.5 ± 15.9 years) were enrolled. The mean serum calcium and phosphorus were7.9 ± 1.3 mg/dL and 5.7 ± 1.7 mg/dL, respectively. VCs were encountered in 38% of the whole group in aortic and mitral valvular location in 64% and 23%, respectively. Hypertension, age >60 years, tobacco use, and hyperphosphatemia were independently associated with VC. Despite a young age of patients, VCs were a common finding and associated with both traditional and chronic kidney disease-specific risk factors.

Prevalence and factors associated with pulmonary arterial hypertension on maintenance hemodialysis patients in Kinshasa, Democratic Republic of Congo: a cross-sectional study.

BACKGROUND: Although cardiovascular diseases in particular Pulmonary Arterial Hypertension (PAH) is associated with, high morbid-mortality in chronic hemodialysis, but its magnitude remains paradoxically unknown in sub-Saharan Africa. The aim of this study was to evaluate the prevalence of PAH and associated factors in chronic hemodialysis in Sub-Saharan African population. METHOD: In a cross-sectional study, patients treated with HD for at least 6 months in 4 hemodialysis centers were examined. PAH was defined as estimated systolic pulmonary arterial pressure (sPAP) ≥ 35 mmHg using transthoracic Doppler echocardiography performed 24 h after the HD session. RESULTS: Eighty-five HD patients were included; their average age was 52.6 ± 15.9 years. Fifty-seven patients (67.1%) were male. Mean duration of HD was 13.3 ± 11 months. With reference to vascular access, 12 (14.1%), 29 (34.1%) and 44 (51.8%) patients had AVF, tunneled cuff and temporary catheter, respectively. The underlying cause of ESRD was diabetes in 30 patients (35.3%). The prevalence of PAH was 29.4%. Patients with PAH had more hyponatremia (11 (44%) vs 10 (16.7%), p = 0.010). In multivariate analysis, unsecured healthcare funding (aOR 4, 95% CI [1.18-6.018]), arrhythmia (aOR 3, 95% CI [1.29-7.34]), vascular access change (aOR 4, 95% CI [1.18-7.51]) and diastolic dysfunction (aOR 5, 95% CI [1.35-9.57] were independently associated with PAH. CONCLUSION: One third of hemodialysis patients exhibit PAH, which is independently associated with low socioeconomic status (unsecured funding, vascular access change) and cardiovascular complications (arrhythmia, diastolic dysfunction).

Predictors of mortality in COVID-19 patients at Kinshasa University Hospital, Democratic Republic of the Congo, from March to June 2020.

INTRODUCTION: since the 1st case of coronavirus disease 2019 (COVID-19) in Kinshasa on March 10th2020, mortality risk factors have not yet been reported. The objectives of the present study were to assess survival and to identify predictors of mortality in COVID-19 patients at Kinshasa University Hospital. METHODS: a retrospective cohort study was conducted, 141 COVID-19 patients admitted at the Kinshasa University Hospital from March 23 to June 15, 2020 were included in the study. Kaplan Meier's method was used to described survival. Predictors of mortality were identified by COX regression models. RESULTS: of the 141 patients admitted with COVID-19, 67.4 % were men (sex ratio 2H: 1F); their average age was 49.6±16.5 years. The mortality rate in hospitalized patients with COVID-19 was 29% during the study period with 70% deceased within 24 hours of admission. Survival was decreased with the presence of hypertension, diabetes mellitus, low blood oxygen saturation (BOS), severe or critical stage disease. In multivariate analysis, age between 40 and 59 years [adjusted Hazard Ratio (aHR): 4.07; 95% CI: 1.16 - 8.30], age at least 60 years (aHR: 6.65; 95% CI: 1.48-8.88), severe or critical COVID-19 (aHR: 14.05; 95% CI: 6.3-15.67) and presence of dyspnea (aHR: 5.67; 95% CI: 1.46-21.98) were independently and significantly associated with the risk of death. CONCLUSION: older age, severe or critical COVID-19 and dyspnea on admission were potential predictors of mortality in patients with COVID-19. These predictors may help clinicians identify patients with a poor prognosis.

[Determinants of non-compliance with antiretroviral therapy in adult patients in Kinshasa]. / Déterminants de la non-observance au traitement antirétroviral chez l'adulte à Kinshasa.

INTRODUCTION: the purpose of this study was to identify the determinants of non-compliance of persons living with HIV with antiretroviral treatment in Kinshasa. METHODS: we conducted a cross-sectional study in Kinshasa from 1st May to 31st August 2015. The study population was composed of patients aged at least 18 years living with HIV who had been treated with antiretroviral drugs for at least 3 months. Adherence Index (subjective method) and prescription refills (objective method) were used to assess compliance. Determinants of non-compliance were identified by logistic regression model. RESULTS: the 400 patients living with HIV had a median age of 43 years (18-75). Global non-compliance rate was 25.5%. Objective non-compliance rate was higher than that of subjective non-compliance (29% vs 21%, p = 0.01). Payment for consultation [adjusted odds ratio (AOR): 1.70; 95% confidence interval (95% CI): 1.02-2.81; p = 0.042), adverse reactions (AOR: 2.23; 95% CI: 1.33-3.75; p = 0.002) and the lack of awareness that missing a dose may worsen disease (AOR: 4.16; 95% CI: 1.04-16.68; p = 0.045) were determinants of non-compliance. Having trusted person was a protective factor versus non-compliance (AOR: 0.54; 95% CI: 0.39-0.93; p = 0.004). CONCLUSION: the rate of non-compliance with antiretroviral treatment is high in Kinshasa. The evaluation of determinants is necessary to establish strategies for improving compliance.

Predictors of mortality in COVID-19 patients at Kinshasa University Hospital, Democratic Republic of the Congo (from March to June 2020)

Introduction: since the 1st case of coronavirus disease 2019 (COVID-19) in Kinshasa on March 10th 2020, mortality risk factors have not yet been reported. The objectives of the present study were to assess survival and to identify predictors of mortality in COVID-19 patients at Kinshasa University Hospital.Methods: a retrospective cohort study was conducted, 141 COVID-19 patients admitted at the Kinshasa University Hospital from March 23 to June 15, 2020 were included in the study. Kaplan Meier's method was used to described survival. Predictors of mortality were identified by COX regression models.Results: of the 141 patients admitted with COVID-19, 67.4 % were men (sex ratio 2H:1F); their average age was 49.6±16.5 years. The mortality rate in hospitalized patients with COVID-19 was 29% during the study period with 70% deceased within 24 hours of admission. Survival was decreased with the presence of hypertension, diabetes mellitus, low blood oxygen saturation (BOS), severe or critical stage disease. In multivariate analysis, age between 40 and 59 years [adjusted Hazard Ratio (aHR): 4.07; 95% CI: 1.16 - 8.30], age at least 60 years (aHR: 6.65; 95% CI: 1.48-8.88), severe or critical COVID-19 (aHR: 14.05; 95% CI: 6.3-15.67) and presence of dyspnea (aHR: 5.67; 95% CI: 1.46-21.98) were independently and significantly associated with the risk of death.Conclusion: older age, severe or critical COVID-19 and dyspnea on admission were potential predictors of mortality in patients with COVID-19. These predictors may help clinicians identify patients with a poor prognosis