Major health Problems

1. Major health Problems Cardiovascular Diseases (CVDs) Stroke Control and Prevention

2. Objectives • To Identify the major non-communicable health problems in the Saudi Arabian society. • To be able to make a framework for their prevention and control. • To identify the risk factors of cardiovascular diseases among Saudi Arabian population • To describe the strategies for prevention andcontrol.

3. Deaths, by broad cause group and WHO Region,1999 % Noncommunicable conditions 75 Injuries 50 Communicable diseases, maternal and perinatal conditions and nutritional deficiencies 25 EMR SEAR WPR EUR AFR AMR

4. DALYS, by broad cause group and WHO Region,1999 DALY = Disability adjusted life-year % 75 Noncommunicable conditions Injuries 50 Communicable diseases, maternal and perinatal conditions and nutritional deficiencies 25 AFR EMR SEAR WPR AMR EUR

5. Low- and middle-income countries suffer the greatest impact on noncommunicable diseases 85% of the global NCD disease burden is borne by low- and middle-income countries 77% of the total number of deaths attributable to NCDs occurred in developing countries Source: WHO: WHA A53/14, 2000

6. DALYs, by broad cause group 1990 - 2020 in developing countries (baseline scenario) % % Communicable diseases, maternal and perinatal conditions and nutritional deficiencies 22 49 21 Injuries 14 15 Neuropsychiatric disorders 9 43 Noncommunicable conditions 27 Source: WHO, Evidence, Information and Policy, 2000

7. What? Cardiovascular Stroke Cancer Diabetes Renal Failure Smoking Injuries Domestic Violence Obesity COPD Musculoskeletal Non-communicable Diseases

8. „Cardiovascular disease has the same meaning for health care today as the epidemics of centuries had for medicine in earlier times: 50% of the population in developed countries die of cardiovascular disease” (Pál Kertai)Someone has a heart attack every two minutes (British Heart Foundation)

9. Cardiovascular (CVD) epidemicin countries of different stages of development Rapid increase Reach the peak Progressive decline Rapid increase in most countries Low rates Slow increase -----1940-----1950-----1960-----1970-----1980-----1990-----2000----- Remains as first cause of death & disability High Income Economies Economies in Transition First cause of death & disability Reach the peak in some countries Slow increase Rapid increase First cause of death & disability in most countries Middle and Low Income Countries Source: WHO, NMH/MNC

10. Tobacco: deaths by World Bank regions estimates for 1990 and 2020 8.4 million Middle Eastern Crescent Latin America & Caribbean Sub-Saharan Africa Other Asia and Islands China India 3 million Former Socialist Countries Established Market Economies Source: Murray CJL, Lopez AD 1996

11. Public Health Significance • - Leading cause of mortality in developed countries and a rising tendency in developing countries (disease of civilization) • - A major impact on life expectancy • - Significantly contributes to morbidity and death rates in the middle aged population: potential life years lost, common cause of premature death, labor force (economic costs), family life • - Morbidity: nearly 30% of all disability cases • - Contributes to deterioration of the quality of life

12. Facts about Cardio-cerebro Vascular Diseases Stroke in United States, Europe and many developing countries represents the 2nd to 3rd/4th Leading Cause of Death and among the Leading Causes of Disability

13. Magnitude of the Problem in Saudi Arabia Versus Selected Countries Country Pop ms HD Stroke DALY Death DALY Death 1. KSA 23520 17 16438 4 03818 2. Egypt 70507 21 103829 8 35054 3. Iran 68070 17 081983 8 31768 4. Australia 19544 05 025474 3 11730 5. Canada 31271 05 043246 3 15621 6. UK 59068 07 120530 4 59322 7. USA 291038 08 514450 4 16768

14. Rheumatic heart disease (Number of deaths), Prevalence of smoking (% in men/women) and Diabetes Mellitus (% Diabetics) Country Rheumatic HD Smoking DM No. of Deaths % of Smokers % Diabetics Men Women 1. KSA 0126 29.1 1.2 9.3 2. Egypt 3398 47.9 1.8 7.2 3. Iran 1138 33.4 3.5 6 4. Australia 0243 30.7 23 6.8 5. Canada 0422 30.0 26.6 8.8 6. UK 1717 34.6 34.4 3.9 7. USA 3479 27.8 22.5 8.8

15. Types of Cardiovascular Disease • - Coronary heart disease (CHD, ischemic heart disease, heart attack, myocardial infarction, angina pectoris) • - Cerebrovascular disease (stroke, TIA, transient ischemic attack) • - Hypertensive heart disease • - Peripheral vascular disease • - Heart failure • - Rheumatic heart disease (streptococcal infection) • - Congenital heart disease • - Cardiomyopathies

16. Tasks of Cardiovascular Epidemiology • - Detection of the occurrence and distribution of CVD in populations, surveillance, monitoring, trends of changes • - Study of the natural history of CVD • - Formulation and testing of etiological hypotheses (risk factors) • - Contribution to the development of cardiovascular prevention programs and the measurement of their effectiveness

17. Parts of Cardiovascular Epidemiology • 1., Descriptive epidemiology: • = Describing distribution of cardiovascular disease by means of certain characteristics such as : PERSON (i.e., age, gender, ethnicity) TIME and PLACE • 2., Analytic epidemiology • = Analyzing relationships between CVD and risk factors (which elevate the probability of a disease at population level), risk model and multicausal developments • 3., Experimental epidemiology/Interventions • = Strategies of cardiovascular prevention (primordial, primary, secondary, tertiary; individual and community levels)

18. Descriptive Epidemiology I. Distribution Patterns in the World • In the world: CVD deaths account for one third of all deaths (25-50% depending on the level of economic development) among which 50%: coronary deaths • CVD made up 16.7 million of global deaths in 2002, among which 7 million due to coronary heart disease, 6 million due to stroke • Distribution of types of CVD in global deaths : • Global cardiovascular deaths in 2002: 16.7 million • among which: coronary heart disease 7.2 million > stroke 6.0 million > 0.9 million hypertensive heart disease > 0.4 million inflammatory heart disease > 0.3 million rheumatic heart disease > 1.9 million other CVD

19. Descriptive Epidemiology II. AGE • Question: What is the relative amount of CVD in death rates in different age groups? • - Early lesions of blood vessel, atherosclerotic plaques: around 20 years - adult lifestyle patterns usually start in childhood and youth (smoking, dietary habits, sporting behavior, etc.) • - Increase in CVD morbidity and mortality: in age-group of 30-44 years • - Premature death (<64 years of age, or 25-64 years): in the elderly population more difficult to interpret death rate due to multiple ill health causes

20. PROPORTION OF MORTALITY IN DIFFERENT AGE-GROUPS (MEN) 4,7% 100% 14,0% 14,9% 90% 80% 26,0% 61,5% 24,6% 70% external 60% others cancer 50% 26,9% CVD 40% 55,8% 22,5% 30% 32,7% 20% 11,4% 10% 4,6% 0% 1-24 yrs 25-64 yrs >65 yrs

21. PROPORTION OF MORTALITY IN DIFFERENT AGE-GROUPS (WOMEN) 4,8% 100% 8,2% 90% 18,3% 40,0% 24,0% 80% 12,2% 70% external 60% others 36,5% 50% cancer 35,0% CVD 40% 64,7% 30% 20% 17,7% 31,3% 10% 7,3% 0% 1-24 yrs 25-64 yrs >65 yrs

22. Descriptive Epidemiology III. SEX • Question: What is the relative amount of CVD in death rates in women and men? • - Widespread idea: CVD is often thought to be a disease of middle-aged men. • - Cardiovascular mortality (fatal cases) are more common among men. However, CVD affect nearly as many women as men, albeit at an older age • - Women: special case (WHO, 2004) • a., Higher risk in women than men (smoking, high triglyceride levels) • b., Higher prevalence of certain risk factors in women (diabetes mellitus, depression) • c., Gender-specific risk factors (risks for women only) (oral contraceptives, hormone replacement therapy, polycystic ovary syndrome)

23. Descriptive Epidemiology IV. ETHNICITY • Question: What is the relative amount of CVD in death rates in different ethnic groups? • - In the US: increased cardiovascular disease deaths in African-American and South-Asian populations in comparison with Whites • - Increased stroke risk in African-American, some Hispanic American, Chinese, and Japanese populations • - Migration: Ni-Hon-San Study: Japanese living in Japan had the lowest rates of CHD and cholesterol levels, those living in Hawaii had intermediate rates for both, those living in San Francisco had the highest rates for both

24. Descriptive Epidemiology V. TIME and PLACE • Question: What is the relative amount of CVD in different geographical places? What are the time trends? International and regional characteristics of distribution • SDR: Standardized Death Rate • Direct mode of standardization, using the age distribution of a hypothetical European standard population • Premature death rates for comparison purposes (<64 years of age)

25. Descriptive Epidemiology VI. World Trends • Developed countries: decreasing tendencies (e.g, USA: 30% between 1988-98, Sweden: 42%) • - improvement of lifestyle factors, for example, a decrease of smoking and a higher level of health consciousness in many developed countries • - better diagnostic and therapeutic procedures (e.g., bypass surgeries, hypertension screening, pharmacological treatment of hypertension and hypercholesterinaemia, access to health care) • Developing countries: increasing tendencies • - increasing longevity, urbanization, and western type lifestyle

26. Descriptive Epidemiology VII. International Comparisons • Aims: • a., Where are the rates higher or lower? • b., Interpretation of time trends • c., Inequalities in cardiovascular death

27. Analytic Epidemiology I. Role of Risk Factors • Over 300 risk factors have been associated with coronary heart disease, hypertension and stroke • Approx. 75% of CVD can be attributed to conventional risk factors • Risk factors of great public health significance: • - high prevalence in many populations • - great independent impact on CVD risk • - their control and treatment result in reduced CVD risk • Developing countries: double burden of risks (problems of undernutrition and infections + CVD risks)

28. Analytic Epidemiology II. Classification of Risk Factors

29. Analytic Epidemiology III. Hypertension • - Systolic blood pressure >140 Hgmm and/or a diastolic blood pressure > 90 Hgmm • - Free of clinical symptoms for many years (screening) • - In most countries, up to 30 percent of adults suffering, increasing with age in civilized countries • - Positive family history • - Dietary habits (a high intake of salt, processed food, low levels of water hardness, high thyramine content of food, alcohol use) • - Modern lifestyle (increased sympathetic activity, psychosocial stress, leading position in job)

30. Analytic Epidemiology IV. Rheumatic Fever and Rheumatic Heart Disease • Development: Rheumatic fever usually follows an untreated beta-haemolytic streptococcal throat infection in children • As a consequence, the heart valves are permanently damaged which may progress to heart failure • Today mostly affects children in developing countries, linked to poverty, inadequacy of health care access • Occurrence: 12 million people currently affected by rheumatic fever and RHD, two-thirds are children (5-15 years), for example: approx. 1 000 000 in Sub-Saharan Africa, 700 000 in South-Central Asia, 176 000 in China, 150 000 in North Africa, 40 000 in Eastern Europe (!)

31. Analytic Epidemiology V. Abnormal Blood Lipids • - Se cholesterol: structure and functioning of blood vessels, atherosclerotic plaques • - Altering functions of cholesterol fractions (LDL: risk, HDL: protection) • - Estrogen: tends to raise HDL-cholesterol and lower LDL-cholesterol, protection for women in reproductive age • - Partially genetic determination of metabolism, partially dependent of nutrition (egg, meats, dairy products)

32. Current Recommended Lipid Levels

33. Analytic Epidemiology VI. Tobacco Use • - The link between smoking and CVD (mainly CHD) was identified in 1940 • - Greatest risk: initiation < 16 years • - Passive smoking: additional risk • - Women smokers: are at higher risk of CHD and CVD than male smokers • - Several mechanisms: damages the endothelium lining, increases atherosclerotic plaques, raises LDL and lowers HDL, promotes artery spasms, raises oxigen demand of the heart muscle • - Nicotine accelerates the heart rate (RR), and raises blood pressure

34. Analytic Epidemiology VII. Physical Inactivity • - Regular physical activity: protective factor • - Intensity and duration (150 minutes/week intermediate or 60 minutes/week heavy) • - Modernization, urbanization, mechanized transport: sedentary lifestyle (60% of global population) • - Raises CVD risk and also the development of other risk factors (glucose metabolism, diabetes mellitus, blood coagulation, obesity, high blood pressure, worsening lipid profile) • - Physical activity: helps reduce stress, anxiety and depression

35. Analytic Epidemiology VIII. Obesity, Diabetes Mellitus, Unhealthy Diet • - Body Mass Index: > 25: overweight, > 30: obesity • - A modern ”epidemic”: More than 60% of adults in the US are overweight or obese, in China: 70 million overweight people • - Elevates the risk of both CVD and diabetes mellitus • - Diabetes mellitus: damages both peripheral and coronary blood vessels • -Unhealthy diet: low fruit and vegetable, fiber content, and high saturated fat intake, refined sugar

36. Analytic Epidemiology IX. Psychological and social factors • - Psychological factors (Type A behavior, hostility) • - Depression and CVD: bidirectional link • a., depression may increase the risk of CVD and worsen recovery process • b., CVD may induce depression • - Low socioeconomic status (SES): • a., in developed countries: less educated and lower SES groups (accumulation of risk factors) • b., in developing countries: more educated and higher SES groups (western lifestyle)

37. Cardiovascular Prevention I. • Primordial: Social, legal and other (often nonmedical) activities which may lead to a lowering of risk factors (e.g., socioeconomic development, smoke-free restaurants) • Primary: Controlling risk factors contributing to CVD (health education programs, anti-smoking campaign, sports programs, nutrition counselling, regular check of blood pressure and certain blood parameters, e.g., cholesterol, blood lipids, glucose) • Secondary: Screening and treatment of symptomatic patients, set up personal risk profile • Tertiary: Cardiovascular rehabilitation, prevention of recurrence of CVD (new heart attack: 5-7 times higher risk among CVD patients)

38. Cardiovascular Prevention II. • The individual approach (detecting those at greatest risk): lifestyle guidelines (e.g., smoking cessation) • The population-wide approach: (the whole population, western lifestyle ) • Example for community-wide CV prevention programs: • - Framingham Heart Study (1948-) Framingham Risk Scoring • - North-Karelia Project (1972-) Finland • - Stanford Projects (1972-75, 1980-86) USA • - Minnesota Cardiovascular Health Program (1980-88) USA • - Multiple Risk factor Intervention Trial (1972-79) USA

39. Key Messages to Protect Heart Health: 1. Heart attacks and strokes are major killers in all parts of the world. Butt they can often be prevented. 2. You can protect yourself from heart attacks and strokes by investing a little time and effort.

40. Objectives • To Identify the major non-communicable health problems in the Saudi Arabian society. • To be able to make a framework for their prevention and control. • To identify the risk factors of cardiovascular diseases among Saudi Arabian population • To describe the strategies for prevention andcontrol.