Late referral and associated factors among chronic kidney disease outpatients in Southern Nigeria.

Background: Chronic kidney disease (CKD) is a recognized noncommunicable disease that contributes to the global disease burden. Studies on late referral (LR) of CKD patients to the nephrologist have reported incidence rates of 22%-58% according to the definition of LR used. CKD patients who present late to the nephrologist tend to have poorer outcomes with increased morbidity and mortality. Aim: The aim of the study is to determine the prevalence of LR and associated factors among CKD outpatients. Materials and Methods: A cross-sectional observational study, in which CKD patients attending the renal outpatient clinic of two tertiary hospitals over a period of 6 months, were recruited. LR was defined as commencement of renal replacement therapy within 3 months after the first presentation to a nephrologist. Results: A total of 181 participants were recruited during the period of study; 114 were men. One hundred and twelve participants (61.8%) had stage 5 CKD, of which 97 had commenced maintenance hemodialysis. The prevalence of LR was 44.8% (81/181) (95% confidence interval: 37.4%-51.9%). Lack of funds was the most frequent reason given by participants who delayed after formal referral to a nephrologist. Being a known diabetic was associated with LR. Age, gender, level of education, occupation, being a known hypertensive, or known diabetic were not significant predictors of LR. Conclusion: Prevalence of LR is high. Education of medical practitioners, patients, and the general public on early symptoms and physical signs of kidney disease is required. Initiation of all-encompassing health insurance scheme is necessary to solve the problem of lack of funds for medical consultation and treatment.

RésuméContexte: La maladie rénale chronique (MRC) est une maladie non transmissible reconnue qui contribue au fardeau mondial de la maladie. Études sur référence tardive (LR) des patients atteints de néphropathie chronique chez le néphrologue ont signalé des taux d'incidence de 22% à 58% selon la définition de la LR utilisée. Les patients atteints d'IRC qui se présentent tardivement chez le néphrologue ont tendance à avoir de moins bons résultats avec une morbidité et une mortalité accrues. But: Le but de L'étude vise à déterminer la prévalence de la LR et des facteurs associés chez les patients ambulatoires atteints de néphropathie chronique. Matériels et méthodes: Une coupe transversale étude observationnelle, dans laquelle les patients atteints de néphropathie chronique fréquentant la clinique de néphrologie rénale de deux hôpitaux tertiaires sur une période de 6 mois, recruté. La LR était définie comme le début de la thérapie de remplacement rénal dans les 3 mois suivant la première présentation à un néphrologue. Résultats: Un total de 181 participants ont été recrutés pendant la période d'étude. 114 étaient des hommes. Cent douze participants (61,8%) ont eu stade 5 CKD, dont 97 avaient commencé une hémodialyse de maintenance. La prévalence de la LR était de 44,8% (81/181) (intervalle de confiance à 95%: 37,4% à 51,9%). Le manque de fonds est la raison la plus fréquemment invoquée par les participants qui ont tardé après avoir été officiellement dirigés vers un néphrologue. Étant un diabétique connu était associé à la LR. L'âge, le sexe, le niveau d'éducation, la profession, être un hypertendu connu ou un diabétique connu étaient prédicteurs non significatifs de la LR. Conclusion: La prévalence de la LR est élevée. Education des médecins, des patients et du grand public sur les premiers symptômes et les signes physiques de la maladie rénale est nécessaire. L'initiation d'un régime d'assurance maladie global est nécessaire pour résoudre le problème du manque de fonds pour la consultation et le traitement médicaux.

Blood pressure variation and its correlates among patients undergoing hemodialysis for renal failure in Benin City, Nigeria.

BACKGROUND: Blood pressure (BP) variation is commonly encountered during hemodialysis (HD) procedure. Both intradialysis hypotension and hypertension have implications for outcome of treatment and overall morbidity and mortality of the patients. METHODOLOGY: A retrospective study was carried out in the dialysis unit of a tertiary health institution in Benin City among patients who had HD for acute kidney injury (AKI) or chronic kidney disease (CKD) over a 3-year period. Data retrieved included age, gender, type of kidney disease, cause of kidney disease, systolic BP at onset of dialysis and at end of dialysis, and diastolic BP (DBP) at onset of and at end of dialysis. RESULTS: Complete data were available for 217 patients. One hundred and seven patients (49.3%) had no significant change in BP; 30.9% had intradialytic hypertension (IDHT) while 19.8% had intradialytic hypotension (IDH). IDH was more prevalent among patients with diabetic kidney disease while IDHT was more common among patients with hypertensive nephropathy (P = 0.002). Female patients had higher mean BP parameters compared to male patients pre- and post-dialysis, but only changes in DBP were statistically significant (P = 0.029). Patients with CKD had higher mean BP parameters pre- and post-dialysis compared to patients with acute AKI and the differences were statistically significant. CONCLUSION: Females had higher mean BP parameters than males. Patients with CKD had higher mean BP parameters compared with AKI patients. IDHT is a significant problem among patients on HD in our center. Measures to curtail this trend should be instituted with the goal of reducing morbidity and mortality.

Serum C-reactive protein levels in pre-dialysis chronic kidney disease patientsin southern Nigeria.

BACKGROUND: Cardiovascular disease is the major cause of hospitalization and mortality in chronic kidney disease (CKD). C-reactive protein (CRP) is a marker of cardiovascular disease and predictor of mortality in CKD patients. CKD patients with elevated CRP should be identified early with institution of measures to treat cardiovascular risk factors in order to reduce attendant mortality. AIMS: Determination of serum CRP levels in CKD patients and associated factors. METHODS: This was a case-control study involving 80 consecutive CKD patients and 40 control subjects without CKD. Data obtained from participants included demographics, body mass index (BMI), and aetiology of CKD. Serum CRP levels, albumin, creatinine and lipid profile were determined. Cases and controls were compared. P values <0.05 were taken as significant. RESULTS: The mean age of the CKD subjects was 49.09±16.85 years. The median CRP value was significantly higher in the CKD group compared to controls (p=<0.001). Low, average and high cardiovascular event risk according to CRP values were present in 51(63.8%), 13(16.2%) and 16(20%) of the CKD patients respectively. Cardiovascular event risk was significantly higher in CKD subjects (p=<0.001). Serum creatinine, BMI, triglyceride and atherogenic index of plasma correlated positively with CRP. Estimated glomerular filtration rate (eGFR), high density lipoprotein-cholesterol and albumin correlated negatively with CRP. Elevated serum CRP was significantly predicted by low eGFR and high BMI on multivariate analysis. CONCLUSION: Chronic kidney disease patients have increased cardiovascular event risk. Interventions aimed at reducing weight and treating dyslipidaemia should be instituted early in order to reduce this risk.

Lipid profile in pre-dialysis chronic kidney disease patients in southern Nigeria.

BACKGROUND: Dyslipidaemia is one of the cardiovascular risk factors responsible for cardiovascular disease and rapid progression of chronic kidney disease (CKD) to end stage renal disease. Early detection and management of dyslipidaemia will reduce cardiovascular burden and retard progression of CKD. AIMS: To determine the prevalence and pattern of dyslipidaemia in pre-dialysis CKD patients in a tertiary hospital in southern Nigeria. METHODS: This was a case-control study that involved 105 consecutive pre-dialysis CKD patients recruited over two years and 105 age and sex matched control subjects. Data obtained from participants included demographics, body mass index, and aetiology of CKD. Blood sampling was done for the determination of creatinine and fasting serum lipids. P values < 0.05 were taken as significant. RESULTS: The mean age of the CKD and control subjects were 46.98±16.81 and 47.57±15.97 years respectively with a male:female ratio of 1.7:1. The median atherogenic index of plasma (AIP), low density lipoprotein-cholesterol and triglyceride (TG) were significantly higher in the CKD patients while mean high density lipoprotein-cholesterol (HDL-C) was significantly lower in the CKD patients (p=<0.001). The overall prevalence of dyslipidaemia in the CKD patients was 60% which was significantly higher than 39% in the control (p=0.002). The prevalence of high AIP, elevated TG and reduced HDL-C increased with worsening renal function. Dyslipidaemia was commoner in female CKD patients (p=0.02) and those who were ≥ 45years (p=0.94). CONCLUSION: Dyslipidaemia is common in pre-dialysis CKD especially in female and older patients. Some lipid abnormalities increased with worsening kidney function.

Chronic kidney disease in Nigeria: Late presentation is still the norm.

BACKGROUND: Chronic kidney disease (CKD) has become a public health problem in Nigeria. Efforts are being geared toward early diagnosis and prevention of CKD. This study involved the evaluation of the referral pattern and mode of presentation of CKD patients at first contact in a tertiary health institution. PATIENTS AND METHODS: Patients' records over an 18 month period were retrieved and the following information extracted: Sociodemographic data, referral hospital, mode of presentation, etiology of CKD, packed cell volume, blood pressure, and estimated glomerular filtration rate (GFR) at first presentation. RESULTS: There were 202 CKD patients with a male: female ratio of 1.7:1 and a mean age of 48.15 ± 16.69 years. The median estimated GFR of the patients at presentation was 3.17 ml/min/1.73 m(2). The common etiologies of CKD were chronic glomerulonephritis, hypertension, diabetes mellitus, obstructive nephropathy in 69 (34.2%), 47 (23.3%), 38 (18.8%), and 21 (10.4%) respectively. Among these patients, 111 (55%) and 98 (48.6%) had moderate to severe hypertension and anemia, respectively, 173 (85.6%) presented in CKD Stage 5, 101 (50%) required urgent hemodialysis whereas 123 (60.9%) required in-hospital admission. Only (18) 9% of these CKD patients presented by self-referral while (103) 51% were referred from secondary and private health facilities. CONCLUSION: Most Nigerian CKD patients still present very late to nephrologists implying that the present preventive strategies have not yielded desired results. Early diagnosis and referral of CKD patients could be better achieved through regular education of the public and retraining of health workers especially those in primary and secondary health institutions.

Quality of life in patients on continuous ambulatory peritoneal dialysis in an African setting.

To determine the quality of life (QOL) of patients on continuous ambulatory peritoneal dialysis (CAPD), we studied all the CAPD patients attending their monthly follow-up care clinics at three tertiary hospitals in Johannesburg by administering the World Health Organization QOL-Bref questionnaire. The patients were grouped according to age, duration of peritoneal dialysis and gender. Data were analyzed to determine the significant differences in the QOL scores among the subgroups. There were 114 patients [64 males (56.1%), with a mean age of 42.4 ± 11.3 years) and 38 healthy control subjects (22 males (57.9%), with a mean age of 42.1 ± 12.4 years]. Twenty-one patients (18.4%) had hemoglobin <10 g/dL, while 16 patients (14%) had serum albumin <3 g/dL. The mean QOL scores in the physical, psychological, social relationships and environment domains of the CAPD patients were 55.7 ± 15.0, 56.6 ± 16.4, 55.3 ± 24.7 and 56.3 ± 16.6, respectively. The CAPD patients had significantly lower QOL scores compared with controls, and those aged <30 years had better scores in the physical and psychological domains, gender and hemoglobin concentration. Serum albumin levels did not have a significant impact on the QOL of the CAPD patients.

Assessment of some cardiovascular risk factors in predialysis chronic kidney disease patients in Southern Nigeria.

BACKGROUND: Cardiovascular risk factors are responsible for cardiovascular disease and rapid progression of chronic kidney disease (CKD) to end-stage renal disease. Prompt evaluation, modification, and treatment of these factors in predialysis patients will reduce morbidity and mortality. This study assessed some cardiovascular risk factors in predialysis CKD patients in a tertiary hospital in Southern Nigeria. PATIENTS AND METHODS: This was a case-control study that involved 76 consecutive predialysis CKD patients and 38 age-and sex-matched controls without CKD over 1 year period. Both groups were assessed for cardiovascular risk factors, and comparisons were made. A P value of <0.05 was taken as significant. RESULTS: The mean ages of the CKD versus control group were 48.00 ± 15.28 versus 45.34 ± 15.35 years. The male:female ratio was 1.7:1 for both groups. The common etiologies of CKD in this study were hypertension 30 (39.5%), diabetes mellitus 23 (30.3%), and chronic glomerulonephritis 19 (25%). There were 38 (50%) in CKD stage 3, 31 (40.8%) in CKD stage 4, and 7 (9.2%) in CKD stage 5. The common cardiovascular risk factors found in the CKD versus control were hypertension (96.1% vs. 42.1%), anemia (96.1% vs. 23.7%), left ventricular hypertrophy (77.6% vs. 23.7%), dyslipidemia (67.1% vs. 39.5%), hypocalcemia (60.1% vs. 18.5%), hyperphosphatemia (63.2% vs. 0%), and hyperuricemia (57.9% vs. 15.8%). These risk factors were significantly higher in CKD group. Hyperphosphatemia and hypoalbuminemia significantly increased across CKD stages 3-5. Anemia was significantly more common in males whereas dyslipidemia was more common in female CKD patients. CONCLUSION: Cardiovascular risk factors were highly prevalent in predialysis CKD subjects even in early stages. Hypoalbuminemia and hyperphosphatemia significantly increased across the CKD stages 3-5 whereas anemia and dyslipidemia showed significant gender differences. Cardiovascular risk factors should be treated early in predialysis CKD patients.

Eight year review of hemodialysis: treated patients in a tertiary center in Southern Nigeria.

BACKGROUND: Hemodialysis (HD) is the readily available modality of renal replacement therapy in Nigeria today. The number of centers for HD continues to increase, but the majority is still located in the big cities and towns. METHODS: A retrospective descriptive study in which records of patients on HD from 2004 to 2011 were reviewed. Data in respect of patients' sex, age, occupation and etiology of kidney disease were collected. Data were analyzed using Statistical Package for the Social Sciences statistical software version 16 (SPSS Inc, Chicago IL). RESULTS: A total of 1278 new patients were admitted for HD over the period of review; 60.9% (778) were males and 39.1% (500) females. Mean age of male patients was significantly higher than that of the females (P < 0.01). Those under the age of 40 years constituted 45.4% (580) of the study population, whereas 43.8% (560) were unskilled workers. Nearly 81.1% had CKD while 18.9% (241) had acute kidney injury (AKI). The most common cause of CKD and AKI were chronic glomerulonephritis (CGN) and sepsis respectively. CONCLUSION: This review showed a preponderance of males in the dialyzed population with males significantly older than the female patients. Patients aged ≤ 40 years and unskilled workers formed a large proportion of the population of HD treated patients. CGN and sepsis were the most common causes of CKD and AKI respectively.