Population Health Flashcards

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1
Q

What is an illness vs. a sickness?

A

Illness - subjective

  • The subjective sense of feeling unwell; a person’s experience of their disease ex. tired, malaise, discomfort

Sickness - cultural conceptions

  • Socially and culturally held conceptions of health conditions which, in turn, influence how the patient reacts ex. the dread of cancer or the stigma of mental illness
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2
Q

What is the definition of a disease?

A

Disease - pathology

  • Pathological process that may or may not produce symptoms resulting in a patient’s illness
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3
Q

What is the definition of a syndrome?

A

Syndrome - when we don’t totally understand

  • A complex of symptoms that occur together more often than would be expected by chance alone ex. Down syndrome, AIDs, or chronic fatigue syndrome
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4
Q

What is the definition of health?

A

Health is the extent to which an individual or group is able to realize aspirations and satisfy needs, and to change or cope with the environment. Health is a resource for everyday life, not the objective of living; it is a positive concept, emphasizing social and personal resources, as well as physical capacities (WHO).

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5
Q

What is wellness?

A

Wellness is a state of dynamic physical, mental, social and spiritual well-being that enables a person to achieve full potential and an enjoyable life.

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6
Q

What is morbidity?

A

Morbidity refers to the rate of being diseased or unhealthy within a population (incidence of ill health).

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7
Q

What is mortality?

A

Mortality - term used for the number of people who have died within a population (incidence of death)

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8
Q

Incidence is useful for studying _______, while prevalence is useful when estimating _________.

A

Incidence is useful for studying causes, while prevalence is useful when estimating health services needs.

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9
Q

What is prevalence vs. point prevalence?

A

Prevalence - all existing cases in a fixed time period/population size

Point prevalence - when calculated at a single point in time = all existing cases NOW/population size

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10
Q

Contrast the approaches of population health and public health with the traditional role of physicians in treating indvidual cases of disease.

A

Population health and public health are concerned with the upstream interventions for health and prevention of disease. This is in contrast to the role of a physician to act downstream in treating individual cases of disease.

Population Health: The approach is to foster individual responsibility for health, while also addressing the underlying social determinants, such as poverty or lack of access to care, that constrain people’s ability to achieve real gains in health.

Public Health: The general focus is on preventing disease and protecting health. It is defined as the organized efforts of society to keep people healthy and prevent injury, illness and premature death.

Note: Individual cases are expressions of underlying patterns within populations, and the causes of disease are to be found in these patterns.

  • The health of populations is always changing and is driven by many factors, most of which lay beyond individual control or medical response.
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11
Q

What is the definition of a health inequity?

A

Health inequity - health differences that are avoidable, unnecessary and unjust

  • Unequal distribution of health determinants - particularly institutional, economic and environmental determinants that lie completely outside of an individual’s control - is a majory cause of health inequity
  • “unequal distribution of health-damaging experiences is not in any sense a ‘nautral phenomenon’ but is the result of a toxic combination of poor social policies and programs, unfar economic arrangements and bad politics”
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12
Q

What is the single most important determinant of health according to Health Canada?

A

Income and social status is the single most important determinant of health. Many studies show that health status improves at each step up the income and social hierarchy. As well, societies that are reasonably propserous and have an equitable distribution of wealth have the wealthiest populations, regardless of the amount they spend on health care.

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13
Q

What are Canada’s 12 Determinants of Health?

A

12 Determinants of Health

  1. Income and social status
  2. Education and literacy
  3. Employment and working conditions
  4. Social support networks
  5. Social environments
  6. Physical environments
  7. Personal health practices and coping skills
  8. Health child and development
  9. Biology and genetic endowment
  10. Health services
  11. Gender
  12. Culture
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14
Q

What is social capital in comparison to social cohesion?

A

Social captial refers to “features of social life - networks, norms and trust - that enable participants to act together to more effectively pursue shared objectives”.

Social cohesion has been defined as “the quality of social relationships and the existence of trust, mutual obligations and respect in communities or in the wide society that helps to protect people and their health.”

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15
Q

What is meant by the psychosocial approach to the social determinants of health?

A

Psychosocial Approach to the SDH

  • Psychosocial factors are the primary focus
  • Associated with the view that people’s perception and experience of personal status in unequal societies lead to stress and poor health
  • Cassel argued that stress from the ‘social environment’ alters host susceptibility, affecting neuroendocrine function in ways that increase the organism’s vulnerability to disease
  • According to these theorists, the experience of living in social settings of inequality forces people constantly to compare their status, possessions and other life circumstances with those of others, engendering feelings of shame and worthlessness in the disadvantaged, along with chronic stress that undermines health
  • Steep hierarchies in income and social status weaken social cohesion, with the disintegration of social bonds and is also seen as negative for health
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16
Q

What is the social production of disease/political economy of health framework, in the context of the SDH?

A

Social Production of Disease/Political Economy of Health: SDH

  • Addresses economic and political determinants of health and disease
  • “materialist or neomaterialist”
  • Argues that interpretation of links between income inequality and health must begin with the structural causes of inequalities and not just focus on preceptions of that inequality
    • The effect of income inequality on health reflects both lack of resources held by individuals, and systematic under-investments across a wide range of community infrastructure
17
Q

What is the ecosocial approach to the SDH?

A

Ecosocial Approach

  • Develop analysis of current and changing population patterns of health, disease and well-being in relation to each level of biological, ecological and social organization, all the way from the cell to human social groupings at all levels of complexity, through the ecosystem as a whole
18
Q

What is the social selection perspective?

A

The social selection perspective implies that health determines socioeconomic position, instead of socieeconomic position determining health.

  • Health status influences social mobility ex. healthy individuals move up the ladder
19
Q

What is the social causation perspective?

A

The social causation perspective suggests that social position determines health through intermediary factors. Intermediary factors may be material, psychosocial, behavioral and biological.

20
Q

What is the life course perspective?

A

The life course approach explicitly recognizes the importance of time and timing in understanding causal links between exposures and outcomes within an individual life course, across generations, and in population level disease trends.

21
Q

What were the results of the Whitehall I study?

A

Whitehall I

  • 1967-1969: Mortality improvements were not equal across classes
  • Higher employment grade means lower mortality from coronary heart disease
  • Result of study shows that the age-adjusted mortality rate is higher for lower employment status
    • 4.73% in the administrator group
    • 12-16% in the clerical/”other” groups
22
Q

What were the results of the Whitehall II study?

A

Whitehall II

  • Focuses on morbidity, not mortality
  • Self-perceived health much lower in lower status jobs
  • Differences in mortality, morbidity and self-perceived health are only partly accounted for by genetic/biological factors

End results of both Whitehall I and Whitehall II:

  • Low control, low satisfaction at work
  • Lower job status increase behavioral factors such as smoking and obesity
23
Q

What is the definition of an environmental determinant of health?

A

Environmental determinants of health are external agents causally linked to health status in populations OR all physical factors that influence health which are not under voluntary control. For example, second hand smoke is an environmental determinant but smoking is not.

24
Q

What are the types of exposure to environmental determinants of health?

A

Types of exposure:

  • Physical: trauma, noise
  • Biological: infectious diseases carried through water, food, animal or insect vectors
  • Chemical: toxic agents and carcinogens (man made and naturally occurring)
  • Radiological: naturally occuring (radon) or man-made (cell phones)
25
Q

What is the approximate burden of disease as a result of the physical environmet as a percent in Canada and worldwide?

A

The physical environment accounts for 13% of total burden of disease in Canada and 25% worldwide.

26
Q

What is the defintion of incidence?

A

Incidence is a measure of the rate at which new events (such as deaths or cases of disease) arise in a population over a defined period of time. It can be expressed as a proportion or as a rate.

27
Q

What is the incidence density?

A

Incidence density/rate is calculated as the number of new cases arising in a susceptible population divided by the person-time of observation.

  • Gives an estimate of frequency with which the disease is occurring, or the average time-delay between cases
28
Q

What is cumulative incidence?

A

Cumulative incidence is calculated by taking the number of new cases that arise over a fixed time period and dividing it by the number of people at risk at the beginning of that period.

29
Q

Define prevalence.

A

Prevalence is a measure of disease presence; it counts all existing cases in a fixed time period (including those that began before the observation period), divided by the population size.

  • It is influenced by both the incidence and by the duration of illness, which is linked to survival
30
Q

What is the infant mortality rate (IMR)?

A

The IMR is the total number of deaths of children less than one year old in a given year, divided by the total number of live births in the same year.

31
Q

What is the neonatal mortality rate (NMR)?

A

The NMR is the total number of deaths in a give year of children less than one month old, divided by the number of live births in the same year.

32
Q
A