FNS Feb 08 Introduction malnutrition
Transcript of FNS Feb 08 Introduction malnutrition
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CONCEPTS OF HUNGER & MALNUTRITION
THE DUAL BURDEN OF MALNUTRITION
Overnutrition Undernutrition
Dr. Veronika Scherbaum
NUTRITIONAL SITUATION
Introduction to the World Nutrition
Situation
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Family in Ecuador
Expenses (per week)Cereals & roots 17$Milkproducts own supply Meat, fish & eggs no supplyFruits, vegetables & nuts 11$Oil & spices 3$Drinks own supply
Total exp. 31$
GEO,2006
Family in Australia
Expenses (per week)Cereals & roots 29$Milkproducts 25$ Meat, fish & eggs 118$Fruits, vegetables & nuts 31$Oil & spices 35$Drinks 38$
Total 276$
Extra expenses/wkSnacks & sweets 5$Instant products 4$Fast food 28$Cigarettes 64$
Total 101$
GEO,2006
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TOO LITTLE FOOD TOO MUCH FOOD
IDA
IDD
VAD
PEM
IUGR
LBW
Vit B def.(Beri-beri)
Vit C def.(Scurvy)
Vit D def.(Rickets)
Obesity
Diabetesmellitus
Stroke
Heart/arterialdisease
Gallstones
Gout
Dental caries
Too many developing countries are spending e.g.
more on debt service than on social service
The Gap between rich and poor is widening
Income of the richest 1/5s
Income of the poorest 1/5s
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~ 20% of the world‘s population lives on the equivalent of < 1 US$ per day~ 50% of the world’s people earn < 2 US$ per day
ABSOLUTE POVERTY
- a condition of life so limited by malnutrition, illiteracy, disease, squalid surroundings, high infant mortality and low life expectancy as to be below any reasonable definition of human decency“(Robert McNamara, 1978)
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60% of the poor are womenWomen earn for the same job up to 60% less than men1/10 of the paid jobs worldwide is performed by women1/100 of the worldwide property is owned by women2/3 of illiterates are women80% of refugees are women and children
WOMEN IN THE WORLD
4.7
1.3 Bill
1.0 Bill Today: > 6 billion people
2025: about 8 billion people
China
India
USA
Indonesia
Brazil
Pakistan
Russia
Japan
Bangladesh
Nigeria
Mexico
Germany
294.0 Mill
219.8 Mill
178.4 Mill
153.5 Mill
146.7 Mill
143.2 Mill
127.6 Mill
124.8 Mill
103.4 Mill82.4 Mill
Asia
AfricaEurope
South-America North-
America Australia/ Oceania
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Pop
ulat
ion
Rate of Population Growth 1995-2000 (in %)
Demographic transition, life expectancyand population growth
critical
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
1950 1975 2000 2015 2030
Year
Developing countries - urbanDeveloping countries - ruralDeveloped Countries - UrbanDeveloped Countries - Rural
United Nations (2002)
Popu
latio
n (in
Bill
ions
)
Rural and Urban Growth in theDeveloping world
Urban population: (2000) 40% → (2030) 60%
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0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
1950 1975 2000 2015 2030
Year
Industr. countries + LA - urbanIndustr. countries + LA - rural
United Nations (2002)
Urban population: (2000) 75% → (2030) 84%
Rural and Urban growth in Industrialised Countries & Latin America
Popu
latio
n (in
Bill
ions
)
About 1.1 billion people withoutadequate water supply
Population withoutadequate
water supply
Asia
Europe
Africa
Latinamerica
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SANITATION• 40% of the world’s population lacks
access to a toilet
City-wide sanitation intervention in Salvador, Brasil
indoor toilet ↑, no open sewage nearby, water in house↑, hygienic behaviour↑
Diarrhoea prevalence fell by 21% from 9.2 days before intervention to 7.3 days per child-year afterwards (< 3 years)
Mauricio LB, et.al. Lancet, 2007, 370: 1622-1628
CLASSIFICATION OF COUNTRIES
• Developing countries (DC)
• Developed/industrialized countries (DC)
• Less developed countries (LDC)
• Low income countries (LIC‘s)GNP - Gross national product < 800 Dollar
• Low income food deficit countries (LIFDC‘s)• Least developed countries (LLDC‘s)
low income, food deficit, lack of infrastructure, lack of economic development
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INDICATORS of HUMAN DEVELOPMENT – Human Development Index (HDI) -
IN THE PAST 30 YEARS:
• Life expectancy rose from 56 to 64 years
• Mortality rates of preschool children fell from 167 per 1,000 live births to 89
• Adult literacy rate rose from < 65% to 73%• School enrolment increased to 77%(f), 84%(m)
• Incomes per capita more than doubled
Trend in life expectancy at birth1955 - 2002
WHO, 2002
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WHO RegionsAfrican Region
South East Asia RegionEuropean RegionEastern Mediterranean RegionWestern Pacific RegionAmerican Region
UNICEF… RegionsEast Asia and PacificSouth AsiaEastern Europe - CEE/CISMiddle East and North AfricaEastern and Southern AfricaWest and Central AfricaLatin America and CaribbeanIndustrialized countries
WHR 2002, Database
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A: Australia, Germany, Italy, Japan, Singapore, Cuba, CanadaB: China, Philippines, Sri Lanka, Poland, Turkey, Iran, Brazil, MexicoC: Belarus, Hungary, Russia, UkraineD: India, Bangladesh, Egypt, Guatemala, Peru, Ghana, CameroonE: Rwanda, South Africa, Uganda, Kenya, Ethiopia, Congo, Zimbabwe
Examples of countriesgrouped bymortality strata
WHO 2002
Deaths attributable to 16 leading risk factors
World Health Report, 2003
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NCD: Nutrition-related chronic disease World Health Report, 2002
THE DALY COSTS OF HUNGERDisability-adjusted life years (DALYs)
DALY = YLL + YLDYLL: years of lost life due to premature mortalityYLD: years lived with disability for incident cases of non-
fatal health conditionYLD = No. Incident cases x Average duration (years) x Disability weight
DALY: Population measure of incident lost years of healthylife due to diseases, injuries and selected risk factors
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Rural und urban burdens of disease(example: Mexico)
131.9113.0Alcohol dependence83.0113.0Brain vascular disease55.7104.1Diabetes mellitus151.794.7Disease of digestive system65.385.1Ischaemic heart disease36.875.5Road traffic accidents112.466.8Anaemia + Malnutrition46.357.5Liver cirrhosis18.347.9Motor-vehicle related deaths27.439.2Homicide und violence73.929.3Pneumonias92.8112.0Diarrheal diseases
Urban rank
Urban(DALYs)
Ruralrank
Rural(DALYs)
Source: Lozano et al. 1999
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Uauy, SCN, 2006
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Low coststreet foods
15-50% of household food expensesin Africa and Asia
Ineffective and arbitraryinspection
Licensing and inspectionupgrading of quality
Inexpensive, accessible serviceNon-existent licensing systemsVaried and nutritious foodLack of social statusAdequate earnings for vendorsNot a recognized industryEmployment opportunitiesContamination, poor hygieneUse of local resources
ProblemsBenefits
Urban agriculture (UA)contributes to
- food security, poverty alleviation- environment (green belt)
Examples of UA Practices:• Horticultures (incl. soil quality
management, irrigation)• Aquaculture• Livestock raising• Urban forestry
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Compositionof foodconsumptionin developingcountries(percentage)
FAO 2006
PHYSICAL ACTIVITY CHANGES
• Reduction of the level of activity within many occupations
• Changes in types of transportation
• Leisure time (reduced energy expenditure)
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Uauy, SCN Geneva 2006
GEO,2006
MAJOR SHIFTS IN DIET
• Increased energy density
• Added caloric sweeteners
• Increases in animal food intake
• Reductions in cereals, roots and pulses
• Similar intake in fruits & vegetables
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Factors Influencing Obesity
ObesityObesity
Biological
BehaviouralInfluences
• Age
• Gender
• Ethnicity
• Hormonal
• Genetic
Environmental
• Habits
• Emotions
• Attitudes
• Beliefs
• Cognition
Modified from Eggen & Swinburn. BMJ 1997;315:477-480
• Climate
• Changes in living conditions
• Urbanization
• Labor-saving devices
• Changes in transportation
• Changes in working conditions
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BURDEN OF UNDERNUTRITION
• ~ 850 mill of people →inadequate food intake
• 1/3 of children <5 year suffer from growth failure
• ~ 30 - 40% of women are anemic and/or underweight
> 2 billion people suffer from micronutrient deficiencies
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„Hidden“ form of malnutrition: Micronutrient deficiencies
Visual forms of malnutrition:Kwashiorkor andMarasmus
Measured and calculated forms of malnutrition: based on anthropometric data and/ or energy intake
IRON DEFICIENCY / ANEMIA (IDA)
• ~ 2 billion anemic
• Mild to moderate anemiapregnancy complicationsimpairs child developmentdecreases work capacity
• Severe anemia - high mortality
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IODINE DEFICIENCY DISORDERS (IDD)
Iodine required to produce thyroid hormones
• IDD consequences- abortion, stillbirth- congenital effects- mental retardation- deaf-mutism- cretinism
Most preventable cause of mental retardation in the world
VITAMIN A DEFICIENCY (VAD)
Vitamin A regulates cellular differentiation
VAD consequences:- Growth retardation- Epithelial metaplasia- Impaired immune system- Night blindness- Xerophththalmia- Bitot‘s spots
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ZINC DEFICIENCY
• Difficult to assess• High grain – low meat diet• Increases risk of - diarrhea
- respiratory infection- severe malaria- death
FAO Estimation of Undernourishment“Undernourishment”: % of population whose food intake (daily per capita energy availability) falls below minimum requirementDerived from Food Balance sheets andFAO modeling:– Daily per capita dietary energy supply– Energy intake within a country, based on
representative household food intake surveys– Minimum daily per capita energy requirement based
on body weight and activity level weighted by age-sex population fractions for „typical person“
LC Smith, IFPRI, May 1998
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Average supply of dietary energy(person per day)
Range: 3850 - 1680 kcal/person/day
Kcal/p/d
Per capita food consumption
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FOOD AVAILABILITY
• Rose from 2,100 (1970) to 2,700 (2005)kcal/person/day
enough to meet average needs
• But it remains below minimum requirements in Sub-Saharan Africa
• Rose from 3,100 (1970) to 3,400 (2005) in developed countries
EACH DAY about 850 million people go hungry
• Among them are 170 mill. children < 5 y
• Number of food-insecure people has fallen from 950 million (1970) to 790 (1997) and increased again↑
• The WORLD FOOD SUMMIT GOAL (1996) and the Millenium Development Goals:‚half the number of hungry people by 2015‘
can not be reached
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Undernourishment in Developing countries
FAO 2006
Developing countries with < 2200 kcal (in 1999/01)Highest and lowest 5-year average kcal recorded during 1961-2001
FAO 2006
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FAO 2006
Changes of undernourishedpeoplein subregions
from 1990-1992 to 2001-2003
2004
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2002: Asia 500 millions 16 % of total population
SS-Africa 200 millions 33 % of total population
HOUSEHOLD FOOD SECURITY (since 80‘s)
Adequate access to food needed for a healthy and active life for all household members- in terms of quality, quantity, safety and cultural
acceptance
Nutrition Security (since 90’s)
- requires a healthy individual who is able to optimally utilize the offered nutrients
Agriculture commercialization, economic development and nutrition (since 90’s)
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STAPLE FOOD
50 000 edible plant species• 15 crop plants provide 90% of
the world‘s energy intake• 3 crop plants (rice, maize,
wheat) provide 2/3 of the world‘s energy intake
• Rice feeds almost half of humanity
Dominant part of the diete.g. cereals, roots, legumes
Source of macronutrients in % of total energy intake
Children < 5 years, Harari State, Ethiopia
Back, E. 2000
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Source: Golder A. 1999
The Maldives
Child Malnutrition& death
Inadequate dietary intake
Disease
Insufficientaccessto food
Poor water/sanitation & inadequate
health services
Quantity/quality of actual resources & the waythey are controlled
Potential resources: environment, Technology, people
Outcome
Immediate causes
Underlying causes
Basic causes at societal level
Source: The State of the World’s Children, UNICEF, 1998
Inadequate maternal& child-care
practices
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Each year nearly 10 Million children die before their 5th birthday
Changes in <5 Mortality rates
WHO 2004
Unicef 2000
99% of thesedeaths occur in developingcountries
Where are 10 million children dying every year ?
42% in Sub-Saharian Africa, 35% in South Asia
(Lancet Child Survival I, 2003)1 dot = 5000
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What are the main causes of <5 deaths?
The vast majority of these deaths is preventable
WHO/Unicef 2000-2003
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Half of <5-Mortality: within neonatal period (1st month)
• 75% in the first week of life• 40% within first 24 hours• in 40-70% of these deaths:
low birth weight (<2.5kg)
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In developing countries, children who are not breastfed are
6 to 14 times more likely to die
Exclusive breastfeeding (during the first 6 months)can save the lives of 1.3 million children per year(Labbok M. 2007)
Frequent problem: missed opportunities in health institutions
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We are guilty of many errors and many faults, but our worst crime is abandoning the children, neglecting the fountain of life.Many of the things we need can wait. The childcannot.Right now is the time his bones are beingformed, his blood is being made and his sensesare being developed.To him we cannot answer„Tomorrow“.
His name is „Today“.
Gabriela Mistral
A FOCUS ON CHILDREN IS NEEDED
MALNUTRITION AMONG PRESCHOOL CHILDREN
impairs their mental and physical developmentexcess infections and mortalitydecreased activity, poor school performancecompromises their future health, productivity, and food securityundermines economic growth (malnutrition accounts for 20-25% of the economic impact of childhood diseases in LDC) and social justice
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Causes of Chronic Energy Deficiency(CED)
• energy intake less than the individual requirement, for several months or years
• Heavy workloads
• Parasitic infections(hookworm, malaria..)
Example: health of women
Pre-/Peri-/ Postnatal-problems
Malnutrition, Stunting
NeglectAbuseViolence...
ChildhoodReproductive health-problems↓Information about SexualityEarly marriageViolence, STI Early/frequentpregnanciesComplications duringdelivery Illegalel abortionsExperienced infant deaths
Adolescence& Maternity
AgingEarly aging
Chronicphysical/psych. illnessDisabilities
Social Isolation
Impoverishment
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Intergenerational effects
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The female cycle of malnutrition
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43%
12%
19%
26%
Women´s educationWomen´s statusHealth environmentNational food availability
Contributions to reductions in developing-country child malnutrition (1970-1995)Smith et al. 2000
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THE THEORY OF FETAL PROGRAMMING
Maternal malnutrition can cause adjusting mechanisms in the undersupplied foetus which may lead to chronic diseases like coronary heart diseases, hypertension, elevated cholesterol level, disturbed glucose tolerance and diabetes
later on in life
The shifting of obesity towards the poorest women in Southeast of Brasil
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Obesity in women (20 – 49 yrs) by SES in 37 DC ordered by GNP per capita (1992-2000)
Predicted prevalence (%) of women’s obesity in extreme SES at different countries GNP
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In Mexico: Feeding programmes target children < 2 years in lower income households…as well as pregnant and lactating women…
Does adequate targeting of undernutritioncontrol strategies protect families from
potential adverse effects on obesity?
In Mexico, food supplements for women target lowest income households (who are already largely overweight)
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Ferrari M, Mauritania, SCN Geneva, 2006
The dual burden household phenomenOften in households of middle GNP-countries:
coexisting under- and overnutrition
Causes (frequently existing among marginally poor):- cheap energy dense food- „obesogenic“ environment- changes in metabolic system- stunting in childhood- different age-specific
demands of nutrients
Phenomen must beaddressed in all nutritioninterventions!
0
5
10
15
20
Vietnam
China
Kyrgisistan
Indonesia
Russia
Brazil
USA
%Prevalence of dual burden householdsin selected countries
Doak CM et al., 2005
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WHO 2005
The epidemic of overweight
Malnutrition in all its forms• Low birth weight• Underweight (defined by a low weight-for-age)
• Stunting (defined by a low height-for-age)
• Wasting (defined by a low weight-for-height)
• Multimicronutrient deficiency(iron-, iodine, vitamin A-, zinc deficiency, etc.)
• Overweight/Obesity (high BMI for age)
• Nutrition related chronic diseases(NRCDs)
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INTERNATIONAL NUTRITION
• Lecture notes (pdf files) and references can be downloaded underFNS Modulehttp://ilias.uni-hohenheim.deInstitute 140a, International Nutrition, IN
Exam questions to be discussed