Obesity and risk for hypertension and diabetes among Kenyan adults: Results from a national survey

Despite the anticipated growth in the global burden of obesity especially in low-income countries, limited data exist on the contribution of obesity to cardiometabolic diseases in Africa.We examined population-based samples of Kenyan adults who participated in the 2015 national chronic disease risk factor surveillance survey. Weight and height were measured, and body mass index (BMI) was calculated and used as a measure for general obesity. Waist circumference (WC), a clinical measure of central obesity was also measured. Logistic regression was used to assess the association between obesity with hypertension, diabetes, and dyslipidemia risk.Of the 4276 participants, the median (IQR) age was 36 (27–47) years, 41% were men. One-third (37%) of the participants were centrally obese, whereas 10% were generally obese. The odds for overweight and general obesity were highest among females, adults >40 years, and those in the highest wealth quartile. Central and general obesity, assessed by WC and BMI, were associated with hypertension and dyslipidemia but not diabetes for both sexes. Compared with adults of normal weight, individuals with a BMI of ≥30 kg/m² had an odds ratio of 2.39 (95% confidence interval [CI], 1.82–3.12) for hypertension and 2.24 (95% CI, 1.70–2.96) for dyslipidemia.Obesity prevalence is high in Kenya and is associated with hypertension and dyslipidemia but not diabetes. Our findings indicate an urgent need to develop public health interventions to address obesity and prevent the development of comorbid conditions.     

Prevalence and risk factors for erectile dysfunction in men with diabetes,hypertension, or both diseases: a community survey among 1,412 Israeli men

BACKGROUND: Erectile dysfunction (ED) and cardiovascular disease share common risk factors and may be further aggravated by medical treatment for reducing them. HYPOTHESIS: The study was undertaken to assess the prevalence of ED in patients with diabetes (DM), hypertension (HTN), or both diseases, and to evaluate the effect of patient age, medical treatment, and disease duration and control on the prevalence of ED in this population. METHODS: A group of 150 primary practitioners who had patients with known DM and/or HTN conducted a survey, utilizing IIEF-15, a 15-item multidimensional, self-administered questionnaire used for the clinical assessment of ED. Results: In all, 1,412 patients were included: 37% had DM, 38% had HTN, and 25% had both diseases. Their mean age was 55, 58, and 60 years, and 62, 46, and 67% had some degree of ED, respectively. The prevalence of ED increased with age and disease duration in each age group and was higher in subjects with DM than in those with HTN, especially in those aged < 65 years. Poor glycemic control was associated with a higher prevalence rate of ED early in the course of the disease. There was no significant difference in the prevalence of ED according to type and number of antihypertensive drugs. CONCLUSIONS: Erectile dysfunction is common among patients at high risk for cardiovascular disease because of diabetes and/or HTN. Diabetic men are affected earlier than those with HTN. Given the high frequency of ED in young patients with these risk factors, physicians should encourage an open discussion on the subject during routine visits to promote early detection and treatment.     

Prevalence and determinants of hypertension and associated cardiovascular risk factors: data from a population-based,cross-sectional survey in Saint Louis,Senegal

Background

The incidence of cardiovascular disease is growing worldwide and this is of major public health concern. In sub-Saharan Africa, there is a lack of epidemiological data on the prevalence and distribution of risk factors of cardiovascular disease. This study aimed at assessing the prevalence of hypertension and other cardiovascular risk factors among an urban Senegalese population.

Methods

Using an adaptation of the WHO STEPwise approach to chronic disease risk-factor surveillance, we conducted a population-based, cross-sectional survey from 3 to 30 May 2010 on 1 424 participants aged over 15 years. Socio-demographic and behavioural risk factors were collected in step 1. Physical anthropometric measurements and blood pressure were documented in step 2. Blood tests (cholesterol, fasting blood glucose, and creatinine levels) were carried out in step 3.

Results

The prevalence of hypertension was 46% (95% CI: 43.4–48%), with a higher prevalence in females (47.9%) than males (41.7%) (p = 0.015), and 50% of these hypertensive were previously undiagnosed. Mean age was 53.6 years (SD: 15.8). In known cases of hypertension, the average length of its evolution was 6 years 9 months (range 1 month to 60 years). Hypertension was significantly associated with age (p = 0.001), socio-professional category (p = 0.003), dyslipidaemia (p < 0.001), obesity (p < 0.001), physical inactivity (p < 0.001), diabetes (p < 0.001) and stroke (p < 0.001).

Conclusion

We found a high prevalence of hypertension and other cardiovascular risk factors in this population. There is need of a specific programme for the management and prevention of cardiovascular disease in this population.     

Prevalence and risk factors associated with hypertension in the Chinese Qiang population

Our aim is to investigate the prevalence and risk factors associated with hypertension among the Chinese Qiang population. From September 2012 to March 2013, a cross-sectional study was conducted in urban and rural communities of the Qiang population using multistage cluster sampling. A total of 2676 people aged above 20 years were enrolled in the analysis. Standardized mercury sphygmomanometer was used to measure the blood pressure twice after a 10-minute seated rest, and the average blood pressure was obtained. The hypertension prevalence among the population aged above 20 years was 13.9%, and age-standardized prevalence was 12.3%. Male and female prevalence of hypertension, as well as the prevalence in urban and rural areas, all increased with age. There were no significant differences between males and females and between urban and rural residents. Among hypertensive patients, 44.2% were aware of their hypertension, 38.0% were undergoing antihypertensive treatment, but only 10.5% achieved blood pressure control. Multivariate logistic regression analysis showed that the risk factors of hypertension included age, low income, overweight and obesity, family history of hypertension. The prevalence of hypertension in Chinese Qiang adults is significantly lower than the national level. Awareness, treatment, and control rates of hypertension were low in the Qiang population. Thus, hypertension-related health knowledge should be more aggressively delivered to improve public awareness and the capacity of community health services should be strengthened.     

机关人群高血压调查及危险因素分析

目的探讨江苏省南京市省级机关、市级机关人群高血压流行水平及其主要危险因素，为高血压的防治提供一定的依据。方法采用问卷等方式对2622名机关干部进行流行病学调查，以是否发生高血压为因变量，按所得数据进行危险因素分析。结果在2622名调查者中，高血压患者827例，患病率为31．5％，男性患病率（36．3％）高于女性患病率（24．1％）（P〈0．01）。随年龄增加患病率明显增加，影响我省机关人群高血压的独立危险因素为年龄、体质量指数、腰围、空腹胰岛素、低密度脂蛋白胆固醇、空腹血糖。结论改变生活方式，有效预防和控制包括超重和肥胖等在内的高血压发病危险因素，是目前急需解决的公共卫生问题。     

Prevalence of nutrition and exercise counseling for patients with hypertension

OBJECTIVE: To evaluate the prevalence of nutrition and exercise counseling for patients with hypertension. DESIGN: Cross-sectional survey data from the National Ambulatory Medical Care Survey (NAMCS) and the National Hospital Ambulatory Medical Care Survey (NHAMCS) for 1999 and 2000. SETTING: Office-based physician practices and hospital outpatient departments. PATIENTS/PARTICIPANTS: Patients age 18 or older with a diagnosis of hypertension. MEASUREMENTS AND MAIN RESULTS: In 1999 and 2000, over 137 million patient encounters had a diagnosis of hypertension. Nutrition and exercise counseling were provided at 35% and 26% of visits, respectively. Patients older than 74 received the least nutrition (28%) and exercise (18%) counseling. Asians and Hispanics were more likely to undergo any lifestyle counseling, while non-Hispanic whites received the least exercise and nutrition counseling. Patients with 2 cardiovascular comorbidities were counseled for diet (53%) and exercise (32%) more than those with 1 (44% and 31%) or none (30% and 23%; P相似文献   

Prevalence,awareness, treatment,and control of hypertension in Nigeria in 1995 and 2020: A systematic analysis of current evidence

Improved understanding of the current burden of hypertension, including awareness, treatment, and control, is needed to guide relevant preventative measures in Nigeria. A systematic search of studies on the epidemiology of hypertension in Nigeria, published on or after January 1990, was conducted. The authors employed random‐effects meta‐analysis on extracted crude hypertension prevalence, and awareness, treatment, and control rates. Using a meta‐regression model, overall hypertension cases in Nigeria in 1995 and 2020 were estimated. Fifty‐three studies (n = 78 949) met our selection criteria. Estimated crude prevalence of pre‐hypertension (120‐139/80‐89 mmHg) in Nigeria was 30.9% (95% confidence interval [CI]: 22.0%‐39.7%), and the crude prevalence of hypertension (≥140/90 mmHg) was 30.6% (95% CI: 27.3%‐34.0%). When adjusted for age, study period, and sample, absolute cases of hypertension increased by 540% among individuals aged ≥20 years from approximately 4.3 million individuals in 1995 (age‐adjusted prevalence 8.6%, 95% CI: 6.5‐10.7) to 27.5 million individuals with hypertension in 2020 (age‐adjusted prevalence 32.5%, 95% CI: 29.8‐35.3). The age‐adjusted prevalence was only significantly higher among men in 1995, with the gap between both sexes considerably narrowed in 2020. Only 29.0% of cases (95% CI: 19.7‐38.3) were aware of their hypertension, 12.0% (95% CI: 2.7‐21.2) were on treatment, and 2.8% (95% CI: 0.1‐5.7) had at‐goal blood pressure in 2020. Our study suggests that hypertension prevalence has substantially increased in Nigeria over the last two decades. Although more persons are aware of their hypertension status, clinical treatment and control rates, however, remain low. These estimates are relevant for clinical care, population, and policy response in Nigeria and across Africa.     

Prevalence, sociodemographic characteristics and risk factors for hepatitis C infection among pregnant women in Calabar municipality, Nigeria

Background and Aims

The epidemiology and risk factors for hepatitis C virus (HCV) infection in developing countries where intravenous drug use (IDU) is uncommon its poorly understood. This study therefore aims to determine the prevalence of HCV and its associated risk factors among pregnant women in Calabar municipality.

Methods

A total of 506 out of 716 antenatal care (ANC) patients seen at the General Hospital, Mary Slessor Avenue, Calabar between August and November 2005 and the University of Calabar Teaching Hospital (UCTH) between October and November 2005 were evaluated for their HCV status using the One Step HCV Test kit (Binomial diagnostics, UK), with reference to the subjects’ demographic and behavioural risk factors.

Results

HCV prevalence was determined to be 0.4% (2/506) and was only seen in women aged 38 years and over. Histories of blood transfusion, surgery, involvement in polygamous marriage, sharing of a toothbrush and female circumcision were all non-significant risk factors for the infecion.

conclusions

This study reveals a low HCV prevalence among pregnant women in Calabar municipality with no identifiable risk factor. The study calls for a re-evaluation of the transmission modes of HCV especially in developing countries where intravenous drug use is rare.     

Glucose intolerance and associated factors in Mongolia: results of a national survey.

AIMS: Prevalence of glucose intolerance-diabetes and impaired glucose tolerance (IGT)-and of related conditions such as obesity and hypertension, was studied in six population samples in Mongolia in 1999. METHODS: Diagnosis of glucose intolerance was made on the basis of 2-h blood glucose concentration, according to criteria recommended by the latest report of a WHO Expert Group. RESULTS: Crude prevalence of diabetes was 2.9% (2.6% in men and 3.2% in women). Prevalence of IGT was 10.2% (9.3% in men and 10.8% in women). Age standardization to the standard world population of Segi resulted in a total sample prevalence of 3.1% for diabetes and 9.2% for IGT. Prevalence of abnormal glucose tolerance differed according to district of residence. Approximately one-third of the subjects with diabetes were diagnosed prior to the survey. Of those who were diagnosed previously, approximately one-half were not under any form of treatment. Subjects with abnormal glucose tolerance were older, more obese and had higher blood pressure and prevalence of hypertension than those with normoglycaemia. One-half of men and almost one-half of women were hypertensive. Three-quarters of the diabetic subjects were hypertensive. One-third of all subjects were centrally obese. Considering the conditions of principal interest-glucose intolerance, hypertension and obesity-one-half of all subjects demonstrated one or more of these conditions. Central obesity was the most common condition, followed by hypertension and then glucose intolerance. Central obesity and hypertension was the most common combination (17% of all subjects) and 4% exhibited all three conditions. CONCLUSIONS: Non-communicable diseases are already a threat to public health in Mongolia. Although the prevalence of diabetes is not high by international standards, the relatively high prevalence of IGT suggests that the situation may deteriorate in the future in the absence of concerted action to prevent and control diabetes and related conditions.     

Sustained cannabis use does not predispose clinical hypertension: Findings from a national survey

Cannabis is among the most used recreational and medicinal drugs in the United States. The effects of chronic use on hypertension remain poorly understood. Our study retrospectively evaluated data collected by the National Health and Nutrition Examination Survey from 2017 to 2018. Cannabis use was measured with five metrics: (1) sustained use at any point in the past, (2) sustained use within the past year, (3) frequency of use, (4) age of first cannabis use, and (5) current use. Hypertension status was determined by individuals reporting having been diagnosed in the past. Multivariable logistic regressions were performed, controlling for age, race, and gender. A total of 4565 respondents were identified, of which 867 (19.0%) reported sustained cannabis use in the past. Participants who reported past sustained cannabis use did not have statistically different odds of having hypertension (OR: 1.12; 95% CI: .66–1.91; p = .6). Moderate (OR: 1.08; 95% CI: .36–3.25; p = .8) and highly-frequent users (OR: 1.30; 95% CI: .56–3.03; p = .4) did not have different odds of having hypertension than infrequent users. No relationship between the age of first cannabis use and hypertension was observed. The recency of sustained cannabis use was not associated with hypertension status. Current cannabis users had similar odds of hypertension as past users (OR: 1.03; 95% CI: .59–1.79; p = .9). The findings of this study indicate that neither past nor current cannabis use is associated with clinical hypertension.     

Prevalence of epilepsy in Rwanda: a national cross-sectional survey

Objective  To estimate the prevalence of epilepsy in Rwanda, as part of a survey of musculoskeletal impairment (MSI).
Methods  Cross-sectional nationally representative survey. Clusters of 105 people were selected with probability proportional to size, using the 2002 national census as the sampling frame. Within each cluster, 80 people were selected through compact segment sampling. Physiotherapists examined all participants using a standard questionnaire to assess the presence of seizures through self-report, as well as aetiology, treatment needs and severity of the seizures. Health-related quality of life was assessed using the EuroQol generic health index (EQ5D).
Results  The response rate was 80.8%, with 6757 individuals screened. The estimated prevalence of epilepsy was 0.7% (95% confidence intervals 0.5–0.9%). A quarter (23%) of cases reported that onset of epilepsy was at birth, for 32% onset was between birth and age 5, 23% between ages 5 and 16, and 21% above the age of 16. In 4.3% of people with epilepsy, an accident during a seizure caused permanent MSI, as identified by a case history and physical examination. The majority of people with epilepsy (59.6%) had never received medical treatment for it. Epilepsy was associated with a significantly reduced quality of life.
Conclusions  Epilepsy is a significant and neglected health problem in Rwanda at all ages. Investing in treatment for epilepsy would prevent some disability causing accidents from occurring.     

Social support and management of hypertension in south-west Nigeria

The relationship between social support and health has been of great scientific interest for many years. Several epidemiological studies have pointed out the importance of social support for morbidity and mortality.1 For mortality, there are consistent indications of a lower risk of death among people with a large social network.2,3 This beneficial effect is confirmed for several morbidities, including cancer, coronary heart disease and other cardiovascular diseases (CVDs).4,5Over the past quarter of a century, much research has convincingly documented the relationships between social networks and social support on morbidity, mortality, and a variety of positive chronic illness outcomes.6,7 A number of behaviours or mechanisms may modulate the relationship between social support and self-management. For example, it is reasonable to assume that family members and friends may facilitate the self-management process in a variety of ways, providing, for example, occasional advice, emotional support, tangible support that indirectly facilitates self-management (e.g. shopping for heart-healthy food), and more direct assistance with illness-management activities.There is some evidence that illness-specific support is more predictive of health outcomes than general support.8 Therefore one might hypothesise that in the case of chronic illness selfmanagement, illness-specific or regimen-specific support may have a stronger influence on self-management behaviour than more global types of support.Rozanski, Blumenthal and Kaplan9 reviewed 15 studies and found that people who reported low levels of social support were at greater risk of developing CVD. Blazer10 published similar findings, indicating that low levels of perceived social support were found to be risk factors for developing cardiac events. Other research has suggested that adherence to drug therapy was strongly associated with family support provided to patients with hypertension.11Hypertension is a major public health problem and a major risk factor for stroke, cardiac failure and chronic renal disease in developing countries. Currently, one-quarter of the world’s adult population has hypertension, and modelled projections indicate an increase to 1.15 billion hypertensive patients by 2025 in developing countries.12Several studies have examined the factors influencing compliance behaviours with hypertensive treatment. Among these studies, Marin-Reyes and Rodriguez-Moran11 found that compliance with hypertensive treatment was directly linked to the support of family members.It has been well documented that patients from disrupted or isolated social circumstances are less likely to be good compliers than those with stable families and/or helpful friends. However, only recently have there been systematic studies of attempts to engender or direct social support in order to improve compliance with antihypertensive therapy. These studies have not shown an independent effect on compliance of attempting to promote social support, but their results must be regarded as preliminary.The present study investigated the influence of social support on treatment compliance among hypertensive subjects in a poor urban community in south-west Nigeria. A previous study13 of the factors associated with hypertension treatment compliance in this community noted that having social support was associated with treatment compliance. In the present study, we proceeded to explore the issue of social support further by (1) exploring the relationship between social support and good compliance with treatment for hypertension, and (2) identifying factors associated with receiving social support from family and/or friends.     

高血压患者微量白蛋白尿的阳性率及相关因素

本文研究国内高血压患者微量白蛋白尿(MAU)的阳性率及相关因素.入选102例不伴有糖尿病及原发性肾脏疾病的原发性高血压患者.用酶联免疫法测定早晨第一次尿中微量白蛋白,并以108例健康人做对照.尿中微量白蛋白小于20μg/ml为MAU阴性,在20～200μg/ml为MAU阳性.发现MAU的阳性率为23%,显著高于正常人的5%.高血压患者中,MAU阳性者与MAU阴性者相比,体重指数大、有家族史多、收缩压和平均压较高,与空腹血浆胰岛素、胰岛素敏感性指数及脂质指标无关,而且MAU阳性患者并发中风率高.以尿微量白蛋白为应变量作多元逐步线性回归,发现收缩压、体重指数和病程可进入方程;而以中风为应变量作Logistic回归分析发现尿微量白蛋白、收缩压、体重指数和腰臀比可进入方程.说明在不伴有糖尿病的高血压患者中,MAU阳性与血压升高、肥胖和家族史相关,而与胰岛素抵抗及脂质代谢无关.MAU是中风的独立相关因素.     

Prevalence, awareness, treatment, and risk factors associated with hypertension in the Iranian population: the national survey of risk factors for noncommunicable diseases of Iran

BACKGROUND: The prevalence of hypertension in the Middle East is not well defined. We examined the prevalence, awareness, treatment, and control of hypertension in Iran. METHODS: The Survey of Risk Factors of Noncommunicable Diseases was conducted in 2005 and contains a representative sample of the Iranian adult population. Of 70,981 participants, the data of 68,250 adults aged 25-64 years who had two valid blood pressure (BP) readings were analyzed to estimate the total prevalence of hypertension (systolic BP >or= 140 mm Hg, diastolic BP >or= 90 mm Hg, or the concurrent use of antihypertensive agents) in the Iranian adult population. RESULTS: Approximately 25% or 6.6 million Iranians aged 25-64 years had hypertension; additionally 46% or 12 million Iranians aged 25-64 years had prehypertension. Among hypertensive patients, 34% were aware of their elevated BP; 25% were taking antihypertensive medications; and of these treated subjects, only 24% had BP values <140/90 mm Hg. Hypertension and prehypertension were associated with age, male gender, obesity, central obesity, hypercholesterolemia, and diabetes. CONCLUSIONS: The prevalence of hypertension and prehypertension is high, and the rates of awareness, treatment, and control are unacceptably low. These results underscore the urgent need to develop national strategies to improve prevention, detection, and treatment of hypertension in Iran.     

Assessing response to therapy in idiopathic pulmonary arterial hypertension: a consensus survey of Canadian pulmonary hypertension physicians

BACKGROUND:

Many treatment options are now available for patients with idiopathic pulmonary arterial hypertension (IPAH). Data regarding the optimal combination of therapies are lacking, as is consensus on how to assess response to therapy and when to change therapeutic regimens.

OBJECTIVES:

To gather the opinions of Canadian pulmonary hypertension (PH) experts regarding standard practice in the care of IPAH patients after therapy is initiated.

METHODS:

Canadian PH physicians were surveyed using short questionnaires to assess their opinions and practices in the care of IPAH patients. A Delphi forecasting approach was used to gain consensus among Canadian physicians on the most important clinical parameters to consider when assessing patients after the initiation of therapy.

RESULTS:

Twenty-six of 37 Canadian PH experts who were invited to participate completed the study. All endorsed the use of combination therapy for IPAH patients despite the lack of universal provincial coverage for this approach. By consensus, WHO functional class, 6 min walk distance and hospitalization for right heart failure were the most important clinical parameters. The most highly rated physical examination parameters were jugular venous pressure, peripheral edema, the presence of ascites and body weight.

CONCLUSIONS:

The overall approach to care of IPAH patients is similar across PH centres in Canada. A limited number of clinical and physical examination parameters were considered to be most important to reassess patients after therapy is initiated. These parameters, along with definition of threshold values, will facilitate the development of standard practice guidelines for IPAH patients in Canada.     

Coverage in screening for diabetic retinopathy according to screening provision: results from a national survey in England and Wales.

AIM: To assess the proportion of people with diabetes screened for retinopathy according to provision of screening services. METHODS: Twenty-five health authorities in England and Wales were sampled after stratification by type of screening provision for diabetic retinopathy. Nine did not have a population-based screening scheme, six had an optometry scheme, six had a camera scheme and four had schemes with more than one method of screening ('mixed schemes'). Within each authority general practices were randomly sampled, 129 in total, and in each the records of a sample of diabetic patients examined. RESULTS: Of the 9200 records examined, 5812 (63.2%) had a record of one or more retinal examinations from any source in the year before the survey. This proportion did not differ significantly according to type of screening provision. The proportion of people with one or more retinal examinations by an 'expert' (defined as ophthalmologist, diabetologist, optometrist or screening scheme) in the last year was 44.7% where there was no screening scheme and 62.2%, 59.4%, and 61.6%, respectively, where optometry, camera and mixed schemes were present. Adjusted relative odds (95% confidence interval) for a retinal examination from any source in the last year compared with areas with no screening schemes were 1.19 (0.73, 1.93), 1.26 (0.80, 1.98), and 1.19 (0.77, 1.84) for camera, optometry and mixed schemes, respectively. Equivalent figures for an expert retinal examination were 2.30 (1.51, 3.49), 1.86 (1.25, 2.78) and 2.13 (1.32, 3.45). Coverage by schemes themselves did not differ according to type of scheme. Highest coverage rates, including examinations by screening schemes, were achieved in those treated with insulin, and the lowest rates found in those treated with diet alone. CONCLUSIONS: Screening schemes have had a small impact on overall retinal examinations, but a higher impact on the coverage of examinations performed by experts.     

Health behaviour advice from health professionals to Canadian adults with hypertension: results from a national survey

Background

Health professionals play an important role in providing health information to patients. The objectives of this study were to examine the type of advice that Canadians with hypertension recall receiving from health professionals to manage their condition, and to assess if there is an association between health behaviour advice provided by health professionals and self-reported engagement in health behaviour modification.

Methods

Respondents of the 2009 Survey on Living with Chronic Diseases in Canada (N = 6142) were asked about sociodemographic characteristics, health care utilization, and health behaviour modification to control hypertension. Association between receipt of advice from health professional and ever engaging, continuing to engage, and not engaging in health behaviour modification was quantified by prevalence rate ratios.

Results

Most participants (90.9%; 95% confidence interval [CI], 89.6-92.2) reported that the health professional most responsible for treating their high blood pressure was their general practitioner. Approximately 9% reported that they had not received or do not recall receiving any advice for blood pressure control. The most commonly reported advice received from a health professional was to participate in physical activity or exercise (70.0%). Respondents who had received advice on health behaviour change to manage their high blood pressure were more likely to report engaging in the behaviour compared with those who did not receive such advice.

Conclusions

Many Canadians with hypertension receive health behaviour change advice from their health professionals. Receiving this advice was associated with a greater likelihood of attempting health behaviour change and attempting to sustain that change.     

Prevalence and risk factors for pulmonary artery systolic hypertension among sickle cell disease patients in Nigeria

Pulmonary artery systolic hypertension is common and associated with increased mortality among adult sickle cell disease (SCD) patients in the United States. Although the prevalence of SCD is highest in sub‐Saharan Africa, the frequency of pulmonary artery systolic hypertension and the risk factors for the development of pulmonary hypertension have not been reported from Africa. We studied 208 hydroxyurea naïve Nigerian SCD patients at steady state and 94 healthy controls. Pulmonary artery systolic hypertension was defined prospectively as tricuspid regurgitant jet velocity ≥2.5 m/sec. Results were compared with a previously published US prospective SCD cohort. Only 7% of Nigerians compared with 46% of US adults with SCD were >35 years. Tricuspid regurgitant jet velocity was ≥2.5 m/sec in 25% of Nigerian SCD patients. Higher jet velocity was associated with greater serum globulin (P = 0.002), blood urea nitrogen (P = 0.019) and lactate dehydrogenase concentrations (P = 0.026) and with inability to walk >300 m in 6 min (P = 0.042). Compared with the US cohort, Nigerian patients had more hemolysis as indicated by lower hemoglobin and higher lactate dehydrogenase concentrations (P ≤ 0.003). Pulmonary hypertension is common among Nigerian SCD patients. The public health implication of this finding is significant considering the potential number of individuals at risk for this complication. Better understanding of the long term outcome of pulmonary hypertension and causes of death in SCD and the institution of preventive measures are major public health challenges for Africa. The inclusion of African sites in sickle cell pulmonary hypertension clinical trials should be encouraged. Am. J. Hematol., 2008. © 2008 Wiley‐Liss, Inc.     

End digit preference in blood pressure measurement in a hypertension specialty clinic in southwest Nigeria

Background: One of the observer errors associated with blood pressure (BP) measurement using a mercury sphygmomanometer is end digit preference (EDP) which refers to the occurrence of a particular end digit more frequently than would be expected by chance alone. Published reports, mainly from outside Africa, have shown a high prevalence ranging from 22 to 90% of end digit zero in BP readings taken by healthcare workers (HCWs). This study examined the prevalence of EDP and patients' and physicians' characteristics influencing the occurrence of EDP. Methods: A retrospective review was undertaken of BP readings of 114 patients seen over a two-month period at our hypertension specialty clinic. Results: Nurses and physicians displayed a high frequency of preference for end digit zero in systolic blood pressure (SBP) and diastolic blood pressure (DBP) readings. The preference for end digit zero was, however, higher for nurses than for physicians (SBP: 98.5 vs 51.2%, p < 0.001; DBP: 98.5 vs 64.3%, p < 0.001). Among the physicians, the consultant staff displayed the least preference for end digit zero compared to resident doctors. There was no statistically significant difference in gender, age, weight, height and BMI of those with BP readings with end digit zero compared with those with non-zero end digits. Conclusion: The high prevalence of EDP for zero argues for the training, retraining and certification of HCWs in BP measurement and the institution of a regular monitoring and feedback system on EDP in order to minimise this observer error.