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Aims: To investigate mortality in South Asian patients with insulin-treated diabetes and compare it with mortality in non South Asian patients and in the general population., Methods: A prospective cohort study was conducted of 828 South Asian and 27 962 non South Asian patients in the UK with insulin-treated diabetes diagnosed at ages under 50 years. The patients were followed for up to 28 years. Ethnicity was determined by analysis of names. Standardized mortality ratios (SMRs) were calculated, comparing mortality in the cohort with expectations from the mortality experience of the general population., Results: SMRs were significantly raised in both groups of patients, particularly the South Asians, and especially in women and subjects with diabetes onset at a young age. The SMRs for South Asian patients diagnosed under age 30 years were 3.9 (95% CI 2.0-6.9) in men and 10.1 (5.6-16.6) in women, and in the corresponding non South Asians were 2.7 (2.6-2.9) and 4.0 (3.6-4.3), respectively. The SMR in women was highly significantly greater in South Asians than non South Asians. The mortality in the young-onset patients was due to several causes, while that in the patients diagnosed at ages 30-49 was largely due to cardiovascular disease, which accounted for 70% of deaths in South Asian males and 73% in females., Conclusions: South Asian patients with insulin-treated diabetes suffer an exceptionally high mortality. Clarification of the full reasons for this mortality are needed, as are measures to reduce levels of known cardiovascular disease risk factors in these patients., (Copyright 2004 Diabetes UK)

Aims: To estimate the prevalence of blindness and partial sight in the general and diabetic populations and to measure the impact of ethnicity and gender on these rates., Methods: Data on visual impairment in the population to be studied was obtained from the Royal Leicestershire Rutland and Wycliffe Society for the Blind (RLRWSB). Using the validated technique of capture-mark-recapture (CMR), a census day was set and data from four sources collected: hospital admissions data, GP returns, wards, and mass media. Computer cross-linkage to Leicestershire Health Authority data ensured patients were alive and resident in Leicestershire at the census date. Estimates of diabetes, ethnicity and gender prevalence were calculated using the 1991 census., Results: CMR calculations revealed that there was under ascertainment of visual impairment in the RLRWSB data. The CMR calculations with direct age standardization estimate the prevalence of blindness and partial sight in the general and diabetic populations to be 51.8/10 000 (CI 50.6-53.0) and 148.8/10 000 (CI 122.1-175.5), respectively. In the diabetic population there was a higher proportion of visually impaired females than males (P < 0.05), with no overall ethnic differences; however, rates were lower than expected in female Indo-Asians. In the general population there was a higher proportion of visually impaired Indo-Asian people (P < 0.01)., Conclusions: Our study has shown the prevalence of visual impairment in both the general and diabetic populations and has demonstrated both ethnic and gender differences. CMR allows the calculation of prevalence of blindness and partial sight from existing data. When comparing the prevalence of visual impairment, whether from diabetes or other causes, it is important to know the gender and ethnicity of the 'at risk' population, as well as the rates in the background population.

Aims: To examine whether routine care for diabetes mellitus influences the risk of hospital admission., Methods: All people with diabetes in five randomly selected general practices in the city of Leicester were identified from medical records and prescribing information. Cases with a hospital admission between 1992 and 1995 but no admission in the preceding 2 years were compared with age-matched controls in a nested study., Results: The variables significantly associated with an increased risk of admission were duration of diabetes in years (OR 1.07, 95% confidence interval (CI) 1.03-1.11) and number of non-diabetic drugs prescribed (OR 1.51, 95% CI 1.27-1.79). Having attended a hospital clinic in the previous 2 years was associated with reduced risk of admission (OR 0.30, 95% CI 0.14-0.65), whilst having been seen for a diabetes review in general practice was not (OR 0.91, 95% CI 0.41-1.99). Similar results were found for both diabetes-related and unrelated admissions., Conclusions: Although general practice-based review was not associated with a change in the risk of admission, attendance at a hospital clinic was associated with a decreased risk of admission. These results may be explained by the characteristics of those who attend hospital clinics, as well as by the possible effectiveness of access to specialist services in reducing admissions.

Aims: To assess mortality in patients with diabetes incident under the age of 30 years., Methods: A cohort of 23 752 diabetic patients diagnosed under the age of 30 years from throughout the United Kingdom was identified during 1972-93 and followed up to February 1997. Following notification of deaths during this period, age- and sex-specific mortality rates, attributable risks and standardized mortality rates were calculated., Results: The 23 752 patients contributed a total of 317 522 person-years of follow-up, an average of 13.4 years per subject. During follow-up 949 deaths occurred in patients between the ages of 1 and 84 years, 566 in males and 383 in females. All-cause mortality rates in the patients with diabetes exceeded those in the general population at all ages and within the cohort were higher for males than females at all ages except between 5 and 15 years. The relative risk of death (standardized mortality ratio, SMR), was higher for females than males at all ages, being 4.0 (95% CI 3.6-4.4) for females and 2.7 (2.5-2.9) for males overall, but reaching a peak of 5.7 (4.7-7.0) in females aged 20-29, and of 4.0 (3.1-5.0) in males aged 40-49. Attributable risks, or the excess deaths in persons with diabetes compared with the general population, increased with age in both sexes., Conclusions: This is the first study from the UK of young patients diagnosed with diabetes that is large enough to calculate detailed age-specific mortality rates. This study provides a baseline for further studies of mortality and change in mortality within the United Kingdom.

Aims: To measure cause-specific mortality, by age, in patients with insulin-treated diabetes incident at a young age., Methods: A cohort of 23 752 patients with insulin-treated diabetes diagnosed under the age of 30 years, from throughout the United Kingdom, was identified during 1972-93 and followed to February 1997. Death certificates have been obtained for deaths during the follow-up period and cause-specific mortality rates and standardized mortality ratios by age and sex are reported., Results: During the follow-up period 949 deaths occurred and at all ages mortality rates were considerably higher than in the general population. Acute metabolic complications of diabetes were the greatest single cause of excess death under the age of 30 years. Cardiovascular disease was responsible for the greatest proportion of the deaths from the age of 30 years onwards., Conclusions: Deaths in patients with diabetes diagnosed under the age of 30 have been reported and comparisons drawn with mortality in the general population. To reduce these deaths attention must be paid both to the prevention of acute metabolic deaths and the early detection and treatment of cardiovascular disease and associated risk factors.

A cross-sectional survey of dietitians using a structured postal questionnaire was sent to 148 dietitians who provided a service to children with diabetes. One hundred and twenty-two (82%) replied, of whom 50 were paediatric dietitians (4 paediatric diabetes dietitians) and 72 were other grades. One hundred and eighteen (97%) dietitians reviewed newly diagnosed children within 24-48 hours of diagnosis but only 81 (66%) used literature specifically designed for children. The majority 116 (95%) felt they worked within a multidisciplinary team. Only 15 (12%) dietitians used purely qualitative carbohydrate dietary education; the remainder used quantitative methods, e.g. 10 g exchange system. Ninety-one (75%) used carbohydrate exchange lists. High fibre foods were suggested but dietitians felt only a moderate intake was achievable. One hundred and twelve (92%) recommended a reduced fat intake but guidance was not as unanimous on reducing specific fatty acids. Objective assessment of dietary outcomes was limited. Paediatric dietitians compared with other grades were more likely to use innovative methods of education but no other differences in dietary practice existed. A minority of dietitians 17 (18%) felt families would find implementing the diet easy. The survey confirmed national inconsistencies in dietary messages and poor evaluation of patient compliance. Research is required into effective dietary counselling to support evidence-based practice.

The relative risk of death by calendar date of diagnosis was investigated in a population-based incident cohort of 845 (463 males:382 females) IDDM diagnosed in Leicestershire before the age of 17 years between 1940 and 1989. The mortality status of 844 (99.9%) patients was determined as of the 31 December 1991, representing 14,346 person-years of risk. Trends in relative risk of death were investigated using Cox proportional hazards modelling for within cohort comparisons and age/sex and calendar time adjusted standardized mortality ratios (SMR) using generalized linear modelling for external comparisons. Median age at diagnosis was 10 years (range 3 months to 16 years); median duration of diabetes 15 years (range 1-51 years). Forty-four patients had died (5.2%; median age at death 31 years, range 11-51 years). A further four patients died at presentation (within 24 h) from ketoacidosis and are excluded from all analyses. Calendar date of diagnosis was found to be an important predictor of mortality. Adjusting for attained age there was evidence of a decline in relative risk of death with calendar date of diagnosis of 3.4% (95% CI, 0.005-6.9%) per annum, equivalent to a 32% fall per decade (95% CI, 5-51%), or 84% (95% CI, 21-97) from 1940 to 1989. The data are consistent with a large fall in mortality between the 1940s and 1950s representing over 50% of the total reduction in mortality between 1940 and 1991. Neither sex nor age at diagnosis were significant predictors of mortality. Over the study period 1940-89 the SMR (male and female combined) fell from 981 (541-1556) to 238 (60-953) relative to the general population. This population-based study shows that the prognosis for Type 1 (insulin-dependent) diabetes mellitus has improved markedly over the period 1940-1991.

During 1990-91 postal questionnaires were sent to the parents of 309 children living in the United Kingdom who developed diabetes before the age of 2 years during 1972-1981. The aim of the survey was to explore how they had coped with their child's condition. Completed questionnaires were returned by 85% of parents. The children had a mean age of 14 (range 9-19) years and diabetes for a mean duration of 13 (range 9-18) years. The cohort's mean age for starting self-injection was reported to be 8 years and most of the children (82%) were still attending full-time education. Diabetes-related difficulties of school were reported for 34% (95% C I 28-40) of the children and 70 (27%, 95% C I 22-32) were estimated to have missed more schooldays than their peers. With increasing duration of diabetes, parents expressed a reduction in anxiety about practical aspects of management such as injections and monitoring, but concern about hypoglycaemia and long-term vascular complications remained high. Parents of girls were more likely to express worries compared to parents of boys, and this excess was significant for worry about diet (chi 2 1df = 17.021, p < 0.001). The paediatric diabetes team caring for early diagnosed children should be aware of the need to discuss the long-term implications of the disorder and be sensitive to the transition period when the child takes progressively more responsibility for self management and the parent's role diminishes.

The prevalence of childhood-onset Type 1 diabetes mellitus is important for determining health care provisions. In Leicestershire 13.5% of the childhood population (0-14 years) is of South Asian origin (census 1991). This study determined the prevalence of Type 1 diabetes in Whites and South Asians in Leicestershire, using a capture/recapture method to coincide with the 1991 Census day. Children (0-14 years) with Type 1 diabetes were captured from the central diabetic register. The health visitor and consultant records were used to recapture the cases. Total ascertainment of cases was 95-100%. The prevalence of Type 1 diabetes in White children (107 cases) was 0.75/1000 children (95% CI 0.61-0.89) compared with the South Asian prevalence (18 cases) of 0.77/1000 (95% CI 0.41-1.13). The overall prevalence in White males was 0.82/1000 (0.61-1.03) compared with 0.68/1000 (0.48-0.87) in females. In South Asian males it was 0.59/1000 (0.15-1.03) compared with 0.96/1000 (0.39-1.53) in females. The prevalence of Type 1 diabetes in children of South Asian migrants to the United Kingdom cannot be said to be different from White children.

The prevalence of diabetes mellitus was investigated in a sample of people aged 65 to 85 years, using a modified oral glucose tolerance test and 1985 WHO criteria. Of the sample of 861, 52 had previously been diagnosed diabetic; 583 consented to be tested and 19 were diabetic. The prevalence of previously diagnosed diabetes was 6.0 (95% CI 4.3 to 8.1) %, and the prevalence of previously undiagnosed diabetes was 3.3 (95% CI 2.0 to 5.0) %. The high prevalence of previously diagnosed diabetes might be due to the longstanding community diabetes care in the area studied.