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Social Determinants of Health Essay

Health status improves at each step up the income and social hierarchy. High income determines living conditions such as safe housing and ability to buy sufficient good food. The healthiest populations are those in societies which are prosperous and have an equitable distribution of wealth.

Why are higher income and social status associated with better health? If it were just a matter of the poorest and lowest status groups having poor health, the explanation could be things like poor living conditions. But the effect occurs all across the socio-economic spectrum. Considerable research indicates that the degree of control people have over life circumstances, especially stressful situations, and their discretion to act are the key influences. Higher income and status generally results in more control and discretion.

And the biological pathways for how this could happen are becoming better understood. A number of recent studies show that limited options and poor coping skills for dealing with stress increase vulnerability to a range of diseases through pathways that involve the immune and hormonal systems. There is strong and growing evidence that higher social and economic status is associated with better health. In fact, these two factors seem to be the most important determinants of health.

Evidence from the Second Report on the Health of Canadians

•Only 47% of Canadians in the lowest income bracket rate their health as very good or excellent, compared with 73% of Canadians in the highest income group. •Low-income Canadians are more likely to die earlier and to suffer more illnesses than Canadians with higher incomes, regardless of age, sex, race and place of residence. •At each rung up the income ladder, Canadians have less sickness, longer life expectancies and improved health. •Studies suggest that the distribution of income in a given society may be a more important determinant of health than the total amount of income earned by society members. Large gaps in income distribution lead to increases in social problems and poorer health among the population as a whole.

Evidence from Investing in the Health of Canadians:

•Social status is also linked to health. A major British study of civil service employees found that, for most major categories of disease (cancer, coronary heart disease, stroke, etc.), health increased with job rank. This was true even when risk factors such as smoking, which are known to vary with social class, were taken into account. All the people in the study worked in desk jobs, and all had a good standard of living and job security, so this was not an effect that could be explained by physical risk, poverty or material deprivation. Health increased at each step up the job hierarchy.

For example, those one step down from the top (doctors, lawyers, etc.) had heart disease rates four times higher than those at the top (those at levels comparable to deputy ministers). So we must conclude that something related to higher income, social position and hierarchy provides a buffer or defence against disease, or that something about lower income and status undermines defences. •See also evidence from the report Social Disparities and Involvement in Physical Activity •See also evidence from the report Improving the Health of Canadians KEY DETERMINANT — 2. Social Support Networks

UNDERLYING PREMISES
EVIDENCE

Support from families, friends and communities is associated with better health. Such social support networks could be very important in helping people solve problems and deal with adversity, as well as in maintaining a sense of mastery and control over life circumstances. The caring and respect that occurs in social relationships, and the resulting sense of satisfaction and well-being, seem to act as a buffer against health problems.

In the 1996¬97 National Population Health Survey (NPHS), more than four out of five Canadians reported that they had someone to confide in, someone they could count on in a crisis, someone they could count on for advice and someone who makes them feel loved and cared for. Similarly, in the 1994¬95 National Longitudinal Survey of Children and Youth, children aged 10 and 11 reported a strong tendency toward positive social behaviour and caring for others.

Evidence from Investing in the Health of Canadians:

Some experts in the field have concluded that the health effect of social relationships may be as important as established risk factors such as smoking, physical activity, obesity and high blood pressure. •An extensive study in California found that, for men and women, the more social contacts people have, the lower their premature death rates. •Another U.S. study found that low availability of emotional support and low social participation were associated with all-cause mortality. •The risk of angina pectoris decreased with increasing levels of emotional support in a study of male Israeli civil servants.

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KEY DETERMINANT — 3. Education and Literacy
UNDERLYING PREMISES
EVIDENCE
Health status improves with level of education.

Education is closely tied to socioeconomic status, and effective education for children and lifelong learning for adults are key contributors to health and prosperity for individuals, and for the country. Education contributes to health and prosperity by equipping people with knowledge and skills for problem solving, and helps provide a sense of control and mastery over life circumstances. It increases opportunities for job and income security, and job satisfaction. And it improves people’s ability to access and understand information to help keep them healthy. Evidence from the Second Report on the Health of Canadians:

•Canadians with low literacy skills are more likely to be unemployed and poor, to suffer poorer health and to die earlier than Canadians with high levels of literacy •People with higher levels of education have better access to healthy physical environments and are better able to prepare their children for school than people with low levels of education. They also tend to smoke less, to be more physically active and to have access to healthier foods. •In the 1996-97 National Population Health Survey (NPHS), only 19% of respondents with less than a high school education rated their health as “excellent” compared with 30% of university graduates. Evidence from Investing in the Health of Canadians:

•The 1990 Canada Health Promotion Survey found the number of lost workdays decreases with increasing education. People with elementary schooling lose seven work days per year due to illness, injury or disability, while those with university education lose fewer than four days per year. •See also evidence from the report: How Does Literacy Affect the Health of Canadians?

KEY DETERMINANT — 4. Employment / Working Conditions

UNDERLYING PREMISES
EVIDENCE

Unemployment, underemployment, stressful or unsafe work are associated with poorer health. People who have more control over their work circumstances and fewer stress related demands of the job are healthier and often live longer than those in more stressful or riskier work and activities. Evidence from the Second Report on the Health of Canadians: •Employment has a significant effect on a person’s physical, mental and social health. Paid work provides not only money, but also a sense of identity and purpose, social contacts and opportunities for personal growth. When a person loses these benefits, the results can be devastating to both the health of the individual and his or her family. Unemployed people have a reduced life expectancy and suffer significantly more health problems than people who have a job. •Conditions at work (both physical and psychosocial) can have a profound effect on people’s health and emotional well-being.

•Participation in the wage economy, however, is only part of the picture. Many Canadians (especially women) spend almost as many hours engaged in unpaid work, such as doing housework and caring for children or older relatives. When these two workloads are combined on an ongoing basis and little or no support is offered, an individual’s level of stress and job satisfaction is bound to suffer. Between 1991 and 1995, the proportion of Canadian workers who were “very satisfied” with their work declined, and was more pronounced among female workers, dropping from 58% to 49%.

Reported levels of work stress followed the same pattern. In the 1996¬97 NPHS, more women reported high work stress levels than men in every age category. Women aged 20 to 24 were almost three times as likely to report high work stress than the average Canadian worker. Evidence from Investing in the Health of Canadians:

•A major review done for the World Health Organization found that high levels of unemployment and economic instability in a society cause significant mental health problems and adverse effects on the physical health of unemployed individuals, their families and their communities.

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KEY DETERMINANT — 5. Social Environments
UNDERLYING PREMISES
EVIDENCE

The importance of social support also extends to the broader community. Civic vitality refers to the strength of social networks within a community, region, province or country. It is reflected in the institutions, organizations and informal giving practices that people create to share resources and build attachments with others.

The array of values and norms of a society influence in varying ways the health and well being of individuals and populations. In addition, social stability, recognition of diversity, safety, good working relationships, and cohesive communities provide a supportive society that reduces or avoids many potential risks to good health.

A healthy lifestyle can be thought of as a broad description of people’s behaviour in three inter-related dimensions: individuals; individuals within their social environments (eg. family, peers, community, workplace); the relation between individuals and their social enivronment. Interventions to improve health through lifestyle choices can use comprehensive approaches that address health as a social or community (ie. shared) issue.

Social or community responses can add resources to an individual’s repertoireof strategies to cope with changes and foster health.

In 1996-97:

– Thirty-one percent of adult Canadians reported volunteering with not-for-profit organizations in 1996-97, a 40% increase in the number of volunteers since 1987.

– One in two Canadians reported being involved in a community organization.

– Eighty-eight percent of Canadians made donations, either financial or in-kind, to charitable and not-for-profit organizations. Evidence from the Second Report on the Health of Canadians
•In the U.S., high levels of trust and group membership were found to be associated with reduced mortality rates. •Family violence has a devastating effect on the health of women and children in both the short and long term. In 1996, family members were accused in 24% of all assaults against children; among very young children, the proportion was much higher.

•Women who are assaulted often suffer severe physical and psychological health problems; some are even killed. In 1997, 80% of victims of spousal homicide were women, and another 19 women were killed by a boyfriend or ex-boyfriend. •Since peaking in 1991, the national crime rate declined 19% by 1997. However, this national rate is still more than double what it was three decades ago.

KEY DETERMINANT — 6. Physical Environments

UNDERLYING PREMISES
EVIDENCE

The physical environment is an important determinant of health. At certain levels of exposure, contaminants in our air, water, food and soil can cause a variety of adverse health effects, including cancer, birth defects, respiratory illness and gastrointestinal ailments.

In the built environment, factors related to housing, indoor air quality, and the design of communities and transportation systems can significantly influence our physical and psychological well-being. Evidence from the Second Report on the Health of Canadians

•The prevalence of childhood asthma, a respiratory disease that is highly sensitive to airborne contaminants, has increased sharply over the last two decades, especially among the age group 0 to 5. It was estimated that some 13% of boys and 11% of girls aged 0 to 19 (more than 890,000 children and young people) suffered from asthma in 1996¬97. •Children and outdoor workers may be especially vulnerable to the health effects of a reduced ozone layer. Excessive exposure to UV-B radiation can cause sunburn, skin cancer, depression of the immune system and an increased risk of developing cataracts Evidence from Investing in the Health of Canadians:

•Air pollution, including exposure to second hand tobacco smoke, has a significant association with health. A study in southern Ontario found a consistent link between hospital admissions for respiratory illness in the summer months and levels of sulphates and ozone in the air. However, it now seems that the risk from small particles such as dust and carbon particles that are by-products of burning fuel may be even greater than the risks from pollutants such as ozone. As well, research indicates that lung cancer risks from second hand tobacco smoke are greater than the risks from the hazardous air pollutants from all regulated industrial emissions combined.
KEY DETERMINANT — 7. Personal Health Practices and Coping Skills UNDERLYING PREMISES

EVIDENCE

Personal Health Practices and Coping Skills refer to those actions by which individuals can prevent diseases and promote self-care, cope with challenges, and develop self-reliance, solve problems and make choices that enhance health.

Definitions of lifestyle include not only individual choices, but also the influence of social, economic,and environmental factors on the decisions people make about their health. There is a growing recognition that personal life “choices” are greatly influenced by the socioeconomic environments in which people live, learn, work and play.

These influences impact lifestyle choice through at least five areas: personal life skills, stress, culture, social relationships and belonging, and a sense of control. Interventions that support the creation of suportive environments will enhance the capacity of individuals to make healthy lifestyle choices in a world where many choices are possible.

Through research in areas such as heart disease and disadvantaged childhood, there is more evidence that powerful biochemical and physiological pathways link the individual socio-economic experience to vascular conditions and other adverse health events.

However, there is a growing recognition that personal life “choices” are greatly influenced by the socioeconomic environments in which people live, learn, work and play. Through research in areas such as heart disease and disadvantaged childhood, there is more evidence that powerful biochemical and physiological pathways link the individual socio-economic experience to vascular conditions and other adverse health events. Evidence from the Second Report on the Health of Canadians

•In Canada, smoking is estimated to be responsible for at least one-quarter of all deaths for adults between the ages of 35 and 84. Rates of smoking have increased substantially among adolescents and youth, particularly among young women, over the past five years and smoking rates among Aboriginal people are double the overall rate for Canada as a whole. •Multiple risk-taking behaviours, including such hazardous combinations as alcohol, drug use and driving, and alcohol, drug use and unsafe sex, remain particularly high among young people, especially young men.

•Diet in general and the consumption of fat in particular are linked to some of the major causes of death, including cancer and coronary heart disease. The proportion of overweight men and women in Canada increased steadily between 1985 and 1996¬97 < from 22% to 34% among men and from 14% to 23% among women. Evidence from Investing in the Health of Canadians:

•Coping skills, which seem to be acquired primarily in the first few years of life, are also important in supporting healthy lifestyles. These are the skills people use to interact effectively with the world around them, to deal with the events, challenges and stress they encounter in their day to day lives. Effective coping skills enable people to be self-reliant, solve problems and make informed choices that enhance health. These skills help people face life’s challenges in positive ways, without recourse to risky behaviours such as alcohol or drug abuse. Research tells us that people with a strong sense of their own effectiveness and ability to cope with circumstances in their lives are likely to be most successful in adopting and sustaining healthy behaviours and lifestyles. •See also evidence from the report Social Disparities and Involvement in Physical Activity •See also evidence from the report Improving the Health of Canadians

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KEY DETERMINANT — 8. Healthy Child Development
UNDERLYING PREMISES
EVIDENCE

New evidence on the effects of early experiences on brain development, school readiness and health in later life has sparked a growing consensus about early child development as a powerful determinant of health in its own right. At the same time, we have been learning more about how all of the other determinants of health affect the physical, social, mental, emotional and spiritual development of children and youth. For example, a young person’s development is greatly affected by his or her housing and neighbourhood, family income and level of parents’ education, access to nutritious foods and physical recreation, genetic makeup and access to dental and medical care.

Evidence from the Second Report on the Health of Canadians

•Experiences from conception to age six have the most important influence of any time in the life cycle on the connecting and sculpting of the brain’s neurons. Positive stimulation early in life improves learning, behaviour and health into adulthood. •Tobacco and alcohol use during pregnancy can lead to poor birth outcomes. In the 1996¬97 National Population Health Survey, about 36% of new mothers who were former or current smokers smoked during their last pregnancy (about 146,000 women). The vast majority of women reported that they did not drink alcohol during their pregnancy. •A loving, secure attachment between parents/caregivers and babies in the first 18 months of life helps children to develop trust, self-esteem, emotional control and the ability to have positive relationships with others in later life. •Infants and children who are neglected or abused are at higher risk for injuries, a number of behavioural, social and cognitive problems later in life, and death.

Evidence from Investing in the Health of Canadians:

•A low weight at birth links with problems not just during childhood, but also in adulthood. Research shows a strong relationship between income level of the mother and the baby’s birth weight. The effect occurs not just for the most economically disadvantaged group. Mothers at each step up the income scale have babies with higher birth weights, on average, than those on the step below. This tells us the problems are not just a result of poor maternal nutrition and poor health practices associated with poverty, although the most serious problems occur in the lowest income group. It seems that factors such as coping skills and sense of control and mastery over life circumstances also come into play. •See also evidence from the report Improving the Health of Canadians KEY DETERMINANT — 9.


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