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Biomedical subjects

P H Winocour

Publications and source records attributed to P H Winocour.

At least 19 recordsLinked to original sources
PubMed2003

Prediction of cardiovascular risk in people with diabetes.

People with diabetes are at high risk of cardiovascular morbidity and mortality, especially if they have already developed vascular problems. For patients who are apparently free of vascular complications, risk tables are often used to assess the risk of cardiovascular events in the following years, and to decide on treatment with statins or anti-platelet therapy. These risk prediction tables include estimates of traditional cardiovascular risk factors and are based on populations, some of which only contained a very small number of people with diabetes. Multiple problems can be identified with these tables, and many seriously underestimate cardiovascular risk in people with diabetes. Possible ways of addressing this include using risk estimation tools based solely on diabetic populations, adding in additional traditional variables such as triglycerides or left ventricular hypertrophy, including novel cardiovascular risk factors, or intervening at a lower level of estimated risk in people with diabetes compared with non-diabetic subjects. Alternatively, estimates of individual risk could be abandoned and all people with diabetes could be treated with statins and other effective agents.

Diabetes Mellitus↗
PubMed2002

Association of British Clinical Diabetologists (ABCD): survey of specialist diabetes care services in the UK, 2000. 2. Workforce issues, roles and responsibilities of diabetes specialist nurses.

AIM: To examine the provision and role of diabetes specialist nurses (DSNs), and the content of patient education programmes in the UK. METHOD: A postal survey of secondary care providers of diabetes services in the UK in 2000. RESULTS: Following two reminders, a 77% response rate demonstrated 2.5 (median) whole time equivalent DSNs per 250 000 population, with only 13% of centres meeting the recommended staffing level of four per 250 000 population. The vast majority carried out work both in hospital and in the community, the proportion a reflection of who employed and managed staff. There was a wide variation in the qualifications required and the nursing gradings of DSNs, and regional variation in the number of grade I nurses, with the greatest proportion based in the South-east of England. The vast majority (96%) provided patient education, and where it existed (in 60% of responses), were the major providers of a patient help line (90%). Although key providers of patient education, there had been no specific education for this task in over 20% of responses. There was broad consistency in the topics covered at educational sessions, although advice on footwear (76%) and home urine glucose monitoring (73%) were least frequently documented. The issuing of literature and cards for patient use was also very variable. Over 25% of bids for diabetes service improvement were for additional DSNs, but only 48% of these were successful. CONCLUSIONS: There has been an improvement in staffing levels of DSNs over the last 10 years but the numbers are many fewer than recommended in national strategy documents, with evidence that despite expansion being given a high profile, such efforts are often unsuccessful. There was also evidence of considerable variation in the qualifications and gradings of DSNs throughout the UK and indeed in their day-to-day roles, and the content of patient education programmes. This suggests the need for a nationally co-ordinated approach to training and recruitment.

Diabetes Mellitus↗
PubMed2002

Association of British Clinical Diabetologists (ABCD): survey of specialist diabetes care services in the UK, 2000. 4. Dietetic services and nutritional issues.

AIMS: To examine the provision of, and variations in, dietetic services for diabetes in secondary care in the UK. METHOD: A postal survey of all secondary care providers of diabetes services. RESULTS: There was a 77% response rate. A dedicated dietician supported diabetes services in 73% of responses, but only 45% were able to see newly diagnosed patients within 1 month. Only 3% of responses documented that dietetic services provided the recommended minimum 22 h weekly input to diabetes care, and an annual dietetic review was said to be available in 15%. An opportunity for more frequent visits was most likely if there was poor glycaemic control (78% of responses), particularly when services were provided by a dedicated diabetes dietician. Although dieticians frequently provided input to patient education (88%), specific training for this purpose and provision for continuing education of these individuals was less common (14% and 63%, respectively). Nutritional guidelines were available in 74%, but only 31% of responses documented current guidelines on obesity management. Of bids for additional dietetic resources, only 21% had been successful. There was evidence of regional variation in service provision, and no greater provision of dietetic services in areas with a large South Asian population and an expected high prevalence of diabetes. In broad terms, dietetic services for diabetes care had not altered in comparison with a similar survey in 1997. CONCLUSIONS: The level of dietetic support of secondary care diabetes services remains dramatically lower than recommended in advisory documents, and appears to have changed little over the last 3 years. This is compounded by marked regional differences, and was no better in areas with a higher than average prevalence of diabetes. The survey also highlights the need for more co-ordinated and structured education and training of dieticians as well as more consistency in nutritional guidelines.

Diabetes Mellitus↗
PubMed2002

Association of British Clinical Diabetologists (ABCD): survey of specialist diabetes care services in the UK, 2000. 3. Podiatry services and related foot care issues.

AIM: To examine the provision of, and variations in, podiatry and other services for diabetic foot care in the UK. METHOD: A postal survey of secondary care providers of diabetes services in the UK in 2000. RESULTS: Following two reminders a 77% response rate was achieved. The responses indicated that 97% had a state-registered podiatrist attached to the service, providing three (median) sessions each week for diabetes care, although only 44% had availability at all diabetic clinics, and only 3% had availability at paediatric diabetic services. Podiatry access at all diabetic clinics increased the likelihood of associated preventative as opposed to reactive ('trouble shooting') care (P < 0.05). All individuals with feet at 'high risk' of ulceration had access to 'at least 2 monthly review' in 15% of trusts, and with active foot ulceration at least weekly in 43%. Over 70% used at least one form of equipment to assess peripheral neuropathy, but peripheral blood flow was only formally measured in 13%. Although podiatry input to patient education was common (84%), only 6% had received formal training in education. Guidelines and strategies for management of active foot problems were available in 50-74% of cases. Orthotic input was highly variable, and absent in 15% of responses. Podiatrist fitting and application of foot protective apparatus was only recorded in 22-61% of responses. Access to isotopic and/or MR foot imaging and peripheral angiography and angioplasty was recorded in 75-83% of responses. Separate specialist foot clinics were available in 49%, and where this was the case the use of newer foot ulcer healing applications was higher (P < 0.01). Clear regional differences were apparent in the nature of the service, the use of newer treatments, and in access to an orthotist, a local 'dedicated' foot surgeon or a separate diabetic foot clinic. Of 245 documented bids for service improvements, only 19 related to foot care and only 21% of bids were successful. CONCLUSIONS: Despite an increase in podiatry support to diabetes care over the last 10 years, the level of access and the nature of the services provided is much less than recommended in many advisory documents. The strategy of a co-ordinated 'team' approach to foot care still takes place in less than 50% of centres. There are clear regional differences in diabetes foot care services. Both providers and purchasers of diabetes services may not have given sufficient attention to this area, given the relatively small number of documented bids for service improvements in this area, and the very low success rate of such bids.

Diabetes Mellitus↗
PubMed2002

Association of British Clinical Diabetologists (ABCD) survey of secondary care services for diabetes in the UK, 2000. 1. Methods and major findings.

OBJECTIVE: To examine the provision, and variations in, secondary care diabetes services in the UK. METHODOLOGY AND PARTICIPANTS: A postal survey of all 238 identified secondary care providers of diabetes services in 2000. RESULTS: Following two reminders, a 77% response rate was achieved. Major deficiencies in core staffing levels were recorded, with 36% of services provided by only one consultant physician with an interest in diabetes. The provision of diabetes specialist nurses was less than recommended in 87% of responses, whereas podiatry and dietetic support was unavailable in 3% and 27% of responses, respectively. Diabetes registers were not present in 28%, and a co-ordinated retinopathy screening programme unavailable in 26% of responses. Key biochemical measurements were unavailable in 9% (microalbuminuria) to 18% (HDL-cholesterol) of responses. A 'Well-Resourced Service' score was devised taking account of levels of personnel, facilities and specialized clinical services. There was a significant geographical variation in this score (P < 0.001), with the lowest score (least well-resourced services) in the Eastern NHS Region of England, and the highest score in the North-west NHS Region of England. The 'Well-Resourced Service' score was also significantly lower (P < 0.05) where there were less than two whole-time consultant physicians providing diabetes services. In contrast to other aspects of service provision, availability of dieticians and a combined diabetes-ophthalmology service had declined since 1990. Of 245 recorded bids for resources and service improvements for diabetes care, the success rate overall was 44%, and lowest where bids were made for dietetic and podiatry support. CONCLUSIONS: There is presently a major shortfall in provision of secondary care diabetes services throughout the UK, with evidence that there is significant regional variation and less facilities and resources where there are less than two consultants providing specialized diabetes services. On average bids for service improvements were only successful in < 50% of cases, most usually where the service was relatively better provided for. Considerable development and investment are required nationally to ensure equitable access to specialized diabetes services, a vital component in reducing adverse diabetes outcomes.

Delivery of Health Care↗
PubMed1996

Measures of tubular function in normoalbuminuric insulin-dependent diabetic patients and their relationship with sodium lithium countertransport activity.

The aim of this study was to assess the relationship between markers of tubular function, markers of glycaemic control and erythrocyte sodium-lithium countertransport activity (SLC) in 40 normotensive, normoalbuminuric insulin-dependent diabetic (IDDM) subjects and 11 normal control subjects. Nine IDDM subjects had SLC > 0.40 mmol lithium h-1 litre RBC-1. Glomerular filtration rate (GFR) and the excretion rate of retinol-binding protein (RBP), N-acetyl-beta-D-glucosaminidase (beta-NAG) and glucose were significantly higher in IDDM subjects compared to control subjects (Mann-Whitney test, p = 0.02, < 0.001, < 0.001 and < 0.001, respectively), whilst the two groups had similar SLC and TmPO4 levels. There was no significant relationship between SLC and the other variables in IDDM subjects, even when comparing IDDM subjects with normal and high SLC. beta-NAG excretion rate was correlated to urinary glucose (rs 0.47, p = 0.001) and, weakly, to the other markers of glycaemic control (fasting blood glucose rs = 0.31, p = 0.03, fructosamine rs 0.28, p = 0.04, HbA1 rs 0.27, p = 0.04). RBP excretion rate was correlated to the excretion rate of beta-NAG (rs 0.38; p = 0.007) and albumin (rs 0.45; p = 0.002); the excretion rates of beta-NAG and albumin were significantly associated (rs 0.37, p = 0.009). Diabetes duration did not correlate to any of the aforementioned variables. In this study, beta-NAG and RBP overnight excretion rates were higher in normoalbuminuric IDDM subjects compared to control subjects but no relationship was present between SLC and tubular function in IDDM patients without complications. Excretion rates of different proteins appear to be interrelated and, in IDDM, beta-NAG excretion is associated with glycaemic control.

Adolescent↗
PubMed1995

Nutrition.

Explore the source record for details and available documents.

Animals↗
PubMed1994

Simvastatin in non-insulin-dependent diabetes mellitus: effect on serum lipids, lipoproteins and haemostatic measures.

The clinical efficacy of the 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMGCoA) reductase inhibitor simvastatin in the treatment of hypercholesterolaemia in non-insulin-dependent diabetes (NIDDM), was examined in a double-blind placebo-controlled study of 6 months in 70 patients with NIDDM (age 25-70 years), of whom 57 were randomised to placebo (29 patients) or simvastatin for 6 months, following a 3-month run-in on diet. Patients were hypercholesterolaemic (7.8 (7.6-8.0) (mean (95% confidence intervals)) mmol/l simvastatin vs. 8.0 (7.7-8.5) mmol/l placebo) and mildly hypertriglyceridaemic (2.6 (2.2-3.0) simvastatin vs. 2.9 (2.3-3.5) placebo). Other lipid measures and estimates of glycaemic control and haemostasis were similar in both groups. There were no significant changes in lipids, haemostatic factors, or measures of glycaemic control in the placebo treatment group. Conversely by the end of 24 weeks, simvastatin produced a 28% reduction in cholesterol (to 5.6 (5.0-6.2) mmol/l (P < 0.001)), a 38% reduction in LDL cholesterol (from 5.5 (5.4-5.6) mmol/l to 3.4 (2.8-4.0) mmol/l, P < 0.001), a 15% reduction in triglyceride (to 2.2 (1.8-2.6) mmol/l, P < 0.05, and a 9% rise in HDL (from 1.16 (1.07-1.25) to 1.23 (1.14-1.32) mmol/l, P < 0.05). Improvements in apolipoprotein B (apo B) (-28%, P < 0.001), the LDL cholesterol to apo B ratio (-20%, P < 0.001), and apo A1 (+15%, P < 0.001) were recorded. There were no effects upon fibrinogen, factor VII activity, factor VIII activity, or measures of glycaemic control (fasting glucose, insulin, C-peptide, or HbA1).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1994

Coronary artery disease is associated with increased lipoprotein(a) concentrations independent of the size of circulating apolipoprotein(a) isoforms.

Lipoprotein(a) [Lp(a)] concentration and apolipoprotein(a) [apo(a)] isoforms (identified by sodium dodecyl sulfate-polyacrylamide gel electrophoresis [SDS-PAGE] and Western blotting) were determined in a group of 508 asymptomatic Caucasian members of the community and in 318 Caucasian patients with angiographically defined coronary artery disease (CAD). Conventional risk factors for CAD were also measured. Lp(a) concentration was almost twice as high in subjects with CAD (geometric mean, 152 mg/L [geometric SD, 10 to 1398 mg/L]) as in asymptomatic control subjects (geometric mean, 84 mg/L [geometric SD, 21 to 334 mg/L]). Asymptomatic women had higher concentrations of Lp(a) than asymptomatic men. Patients with CAD were older and were more likely to have smoked and to have a first-degree relative with premature CAD (< 55 years of age), and a higher proportion were male. Patients with CAD had higher concentrations of Lp(a) independently of the number of isoform bands expressed. When apo(a) isoforms were allocated to 1 of 10 classes on the basis of their molecular size (Rf versus apoB in SDS-PAGE), patients with CAD did not express an excess of low-molecular-mass (higher concentration) isoforms but did express a higher proportion of double-band phenotypes with fewer "null" phenotypes. The relationship between the two isoform bands in a double-band phenotype was the same in both populations. Isoform mobility was defined as a continuous variable equal to the mobility of a single isoform band (single-band phenotypes) or the mean of the two isoforms in a double-band phenotype. Two variables, isoform mobility and the number of isoform bands expressed, were used to summarize the large range of isoform patterns (at least 45) that could be identified. Isoform mobility, the number of isoform bands expressed, and the presence of CAD were the three most important independent predictors of Lp(a) concentration (descending order). Only sex and LDL cholesterol were additional independent predictors of Lp(a) concentration in step-wise regression models including a wide range of demographic factors and lipid and glycemic risk factors. We conclude that Lp(a) concentration is associated with CAD independently of the isoform pattern expressed. The apo(a) gene locus exerts a strong control over circulating Lp(a) concentration, and a better understanding of the control of expression of the apo(a) gene will be essential to understand the relationship between Lp(a) and CAD.

Apolipoproteins A↗