OBJECTIVE —The goal of this study was to estimate the prevalence of diabetes and the number of people of all ages with diabetes for years 2000 and 2030. RESEARCH DESIGN AND METHODS —Data on diabetes prevalence by age and sex from a limited number of countries were extrapolated to all 191 World Health Organization member states and applied to United Nations’ population estimates for 2000 and 2030. Urban and rural populations were considered separately for developing countries. RESULTS —The prevalence of diabetes for all age-groups worldwide was estimated to be 2.8% in 2000 and 4.4% in 2030. The total number of people with diabetes is projected to rise from 171 million in 2000 to 366 million in 2030. The prevalence of diabetes is higher in men than women, but there are more women with diabetes than men. The urban population in developing countries is projected to double between 2000 and 2030. The most important demographic change to diabetes prevalence across the world appears to be the increase in the proportion of people >65 years of age. CONCLUSIONS —These findings indicate that the “diabetes epidemic” will continue even if levels of obesity remain constant. Given the increasing prevalence of obesity, it is likely that these figures provide an underestimate of future diabetes prevalence.

https://www.who.int/diabetes/facts/en/diabcare0504.pdf

Global Prevalence of Diabetes: Estimates for the year 2000 and projections for 2030

https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(05)17741-1.pdf

Global burden of hypertension: analysis of worldwide data

PurposeTo examine the prevalence and the level of awareness, treatment and control of hypertension in different world regions.Study selectionA literature search of the MEDLINE database, using the Medical Subject Headings prevalence, hypertension, blood pressure and cross-sectional studies, was condu

Worldwide prevalence of hypertension: a systematic review.

https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(10)60550-8.pdf

Diabetes in sub-Saharan Africa

https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(12)60861-7.pdf

Hypertension in developing countries

Background The quickening pace of change and adoption of western lifestyles by people in developing countries has led to a sharp rise in the incidence of hypertension. Yet epidemiological studies using validated methods are rare especially in Central Africa. Methods The prevalence of hypertension, according to the World Health Organization definition (systolic blood pressure [SBP] > or = 160, diastolic [DBP] > or = 95 mmHg), was estimated by a population-based survey in 1798 Cameroonian subjects aged 25-74 years. There were 746 individuals from a rural area (308 men, 438 women) and 1052 (461 men, 591 women) from an urban area. Results The response rate was 95% and 91% for the rural and urban populations respectively. The age-standardized prevalence of hypertension was significantly higher in the urban than in the rural area. It was 16.4% (95% CI: 11.6-21.2) in urban men and 12.1% (95% CI: 7.9-16.2) in urban women, while it was 5.4% (95% CI: 2.9-8.0) in rural men and 5.9% (95% CI: 3.8-8.0) in women. Borderline hypertension (SBP 140-160, DBP 90-95 mmHg) was detected in 7.4% (95% CI: 4.4-10.4) and 6.6% (3.1-10.2) of urban, and 7.3% (95% CI: 4.7-9.9) and 2.9% (95% CI: 1.5-4.4) of rural men and women respectively. Conclusions These results indicate that hypertension is still uncommon in rural Cameroon but occurs frequently in the urban community, reaching a proportion comparable with industrialized urban communities.

/pdf/the-prevalence-of-hypertension-in-rural-and-urban-cameroon-7r4ea3ejzk.pdf

The prevalence of hypertension in rural and urban Cameroon

The adoption of Western lifestyles is known to lead to increasing prevalence of non-insulin-dependent diabetes mellitus in Africa, yet epidemiological studies using standardised methods are rare. The prevalence of diabetes and impaired glucose tolerance was determined in a rural and an urban community in Cameroon using the 75-g oral glucose tolerance test and the World Health Organization diagnostic criteria in 719 rural (292 men, 427 women) and 1048 urban (458 men, 590 women) subjects aged 24–74 years. The response rate was 95 and 91 % for the rural and urban population, respectively. The age-standardized prevalence of diabetes in the rural and urban population was respectively 0.9 % (95 % confidence interval (0.2–2.7)) and 0.8 % (0.2–1.8) for men and 0.5 % (0.1–1.6) and 1.6 % (0.7–3.1) for women, and that of impaired glucose tolerance was 5.8 % (3.3–9.4) and 1.8 % (0.9–3.2) for men, and for women, 2.2 % (1.0–4.0) and 2.0 % (0.6–4.5). Although for both men and women the body mass index was higher at all ages in the urban than in the rural area, the 2-h plasma glucose, even after adjustment for age and body mass index, was significantly higher in the rural than in the urban area (p < 0.005, p < 0.002 for men and women, respectively). There was a female excess of diabetes in the urban area and an equal sex distribution in the rural area. In the rural area 67 % (4 of 6) of diabetic subjects were unknown before the survey, compared with 57 % (8 of 14) in the urban area. These data indicate a low prevalence of diabetes in Cameroon; however, the prevalence of impaired glucose tolerance suggests an early stage of a diabetes epidemic. [Diabetologia (1997) 40: 824–829]

/pdf/prevalence-of-niddm-and-impaired-glucose-tolerance-in-a-nuewf48fy7.pdf

J. N. Salah

Papers

The prevalence of hypertension in rural and urban Cameroon

Prevalence of NIDDM and impaired glucose tolerance in a rural and an urban population in Cameroon.