Public Heath Flashcards

1
Q

Causes of associations

A

Bias
Chance
Confounding
Reverse causality
True association

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Define bias?
Selection bias?
Types of information bias? (4)
Publication bias?

A

Definition: A systematic error that results in a deviation from the true effect of an exposure on an outcome
Selection bias- Selection of study population eg. Non response of certain groups, loss to follow up of certain groups
Allocation bias e.g. different participants in the groups

Information bias (MORR) -
Measurement bias (different equipment measures things differently)
Observer bias- Observer’s expectations influence reporting
Recall bias- Past events not remembered or recalled correctly
Reporting bias- Respondent doesn’t report the truth because they feel ashamed/judged

Publication bias- Trials with negative results less likely to be published
Drug trials more likely to be published if sponsored by drug company

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the brad ford hill criteria for causation ?

A

STD R Crap

Strength - very high relative risk (Relative Risk of 21)

Temporality - most important - exposure occurs before outcome (people smoke before developing lung cancer

Dose-response - more risk of outcome with more exposure (the more you smoke the higher the risk of lung cancer)

Reversibility - if you take away the exposure then the risk of disease decreases or is eliminated (stop smoking and you have a decreased risk of lung cancer after 10 years or so)

Consistency - the association is seen in different geographical areas, using different study designs, in different subjects (smoking is associated with lung cancer in dogs, mice and people, all over the world)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

2 pros and 2 cons of RCT ? What is it/>

A

😍 Low risk of bias and confounding
😍 Can infer causality
😒 Time consuming and expensive
😒 Unrepresentative study population

Similar participant are randomly assigned to an intervention or control group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Case control basics? 2 pros 2 cons?

A

Observational study looking at cause of a disease. Compares similar participants with disease and controls without.
Looks retrospectively for exposure/cause
😍 Quick (as outcome has already happened)
😍 Good for rare outcomes (e.g. cancer)
😒 Difficult finding appropriately matched controls
😒 Prone to selection and information bias

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Cross sectional basics? 2 pros / cons?

A

Observational study collecting data from a population and a specific point in time.
A snapshot of a group e.g. census or patient survey
😍 Large sample size
😍 Provides data on prevalence
😒 Risk of reverse causality- which came first?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is reverse causality?

A

Outcome may have caused the exposure
Eg survey on whether depressed people are obese -which caused which

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Cohort basics? Pros? Cons?

A

Longitudinal study in similar groups but with different risk factors/treatments. Follows them up over time
E.g. Framingham Heart Study or smoking doctors vs non-smoking doctors
😍 Can follow up rare exposure e.g. natural disaster
😍 Allow identification of risk factors (exposure causing outcome)
😒 Takes a long time, people drop out
§

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Over a ten year period, there were 50 cases of lung cancer in Crookes (a population of 1,000 people).

What is the incidence (risk) of lung cancer per year?

A

(50/1000)/10 = 0.5%/ year

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In Crookes (a population of 1000 people), 300 of them smoke. Of those who do smoke, 45 of them developed lung cancer. 5 of the non-smokers developed lung cancer.
What is the relative risk of lung cancer in smokers?

A

Risk in exposed = 45/300 = 15%

Risk in unexposed = 5/700 = 0.7%

Relative risk (risk ratio) = 15/0.7 = 21.4 times more likely to develop lung cancer if you smoke compared to non smokers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In Crookes (a population of 1000 people), 300 of them smoke. Of those who do smoke, 45 of them developed lung cancer. 5 of the non-smokers developed lung cancer.
What is the risk of lung cancer that is attributable to smoking?

A

Risk of lung ca in exposed = 45/300 = 15%
Risk of lung ca in unexposed = 5/700 = 0.7%

Attributable risk = (15/100)- (0.7/100) = 14.3

Attributable risk is the number of cases that are due to smoking so you take away the naturally occurring cases (“that would happen anyway”)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In Crookes (a population of 1000 people), 300 of them smoke. Of those who do smoke, 45 of them developed lung cancer. 5 of the non-smokers developed lung cancer.
How many people would have to give up smoking to prevent one death from lung cancer?

A

Attributable risk = (15/100)-(0.7/100) = 0.143

NNT = 1/AR

= 1/0.143 = 6.99

So if 7 people stopped smoking you would prevent 1 death due to lung cancer in this population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define sensitivity? Specificity ? PPV? NPV? And how to work out?

A

Sens - % correctly identified with disease (associated with increased false positives) a/(a+c)

Spec - %correctly excluded as not having the disease (low causes unnecessary follow ups) d/(b+d)

Positive predictive value= % of those with a positive test that actually have the disease a/(a+b)

Negative predictive value= % of those with a negative test who are actually disease free d/(c+d)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the Wilson screening criteria

A

INASEP

Important disease
Natural history of the disease must be understood e.g. detectable risk factors, disease marker
Simple, safe, precise and validated test
Acceptable to the population
Effective treatment from early detection with better outcomes than late detection
Policy of who should receive treatment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Disadvantages of screening

A

Over detection of sub clinical disease
Needless worry if the screening result comes back positive and/or exposure to harmful diagnostic tests e.g. colonoscopy after faecal occult blood.
Is this higher in low sensitivity of low specificity? Answer= low specificity!
Over-identification and treatment of sub-clinical and harmless disease.
Harm from the screening test or subsequent treatment e.g. antibiotic resistance in GBS pregnant women

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

lead time vs length time bias ?

A

Lead time bias= Early identification doesn’t alter outcome but appears to increase survival
e.g. patient knows they have the disease for longer
Length time bias= Disease that progress more slowly is more likely to be picked up by screening (i.e. symptom free and around for longer), which makes it appear that screening prolongs life.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Mnemonic for health inequality ?

A

PROGRESS
Place of Residence (rural, urban, etc.)
Race or ethnicity
Occupation
Gender
Religion
Education
Socioeconomic status
Social capital or resources

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Definition of health
Key articles of human rights act of 1998

A

Definition of health: a state of complete physical, mental and social wellbeing. No merely the absence of disease or infirmity

Article 2 – right to life
Article 3- right to freedom from inhuman and degrading treatment
Article 8- right to respect for privacy and family life
Article 12- right to marry and found a family
Article 14- right to freedom from discrimination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Causes of errors

A

Sloth error – being lazy, not bothering to check results/ information for accuracy. There is incomplete evaluation.- improved by paying attention to detail, and checking information

Lack of skill – lack of appropirate skills teaching or practice- improved by being properly trained in your role and PPD!

Communication breakdown – unclear instructions or plans and not listening to others- improved by being approachable and listening.
System failure
Human factors
Judgement failure
Neglect
Poor performance
Misconduct

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

4 parts of negligence ? What is bolam ? Bolitho?

A

Was there a duty of care?
Was there a breach in that duty?
Was the patient harmed?
Was the harm due to the breach in care?

Bolam - Would a group of reasonable doctors do the same?
Bolitho - Would that be reasonable?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What are the 3 domains of public health?

A

Health improvement
Social interventions and preventing disease, promoting health and reducing inequalities

Health protection
Measures to control infectious disease risk and environmental hazards

Improving services
Organization and delivery of safe high quality services

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the health needs assessment?

A

Is a way of systematically reviewing health issues to find a list of agreed priorities and resource allocations that will improve health and reduce inequalities

Needs assessment -> planning -> implementation -> evaluation -> repeat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the Bradshaw taxonomy of need? (4 types of need)

A

Felt need- individual perceptions
Feeling back pain

Expressed need- individual seeks help (demand)
Going to the Dr with back pain

Normative need- professional defines intervention
GP decides you need a physio

Comparative need- comparison
Compare all the referrals from GP X to physio to GP Y

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What are the 3 approaches to HNA?

A

Epidemiological
Defines the problem and looks at the size of it using routine and primary data

Comparative
Looks at services received and compares with a similar area – may compare health outcomes

Corporate
Asks the local population and health profs what the needs are using focus groups etc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Pros / cons of epidemiological approach to HNA

A

pros
Uses existing data
Provides incidence mortality and morbidity data
Can evaluate services by trends over time

Cons
Quality of data is vsriable
Data collected might not be the data required
Doesn’t consider the felt needs or opinions of those its looking at

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Pros / cons of comparative approach to HNA

A

Comparative
Pros
Quick and cheap if data available
Indicates whether services are better or worse in comparable areas

Cons
Difficult to find a comparable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Pros / cons of corporate approach to HNA

A

Corporate
Pros
Based on felt and expressed needs
Recognises the knowledge and experiances of those working in the population
Takes into account a wide range of views

Cons
Difficult to establish need from demand
Groups may have vested interests
May be influences by political agendas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

3 types of health behaviour

A

Health behaviour
Prevent disease
E.g go for a run, wear sun screen etc

Illness behaviour
Going to the DR

Sick role behaviour
Taking medications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

3 types of behaviour change

A

Transtheorectical model-
Pre contemplation- not ready yet
Contemplation
Preparation
Action
Maintenance / relapse

Nudge – nudge the environment for positive change – fruit near the checkouts

Theory of planned behaviours – best predictor of change is intention
Persons attitude to the behaviour (smoking is bad)
Subjective norms- percieved social pressures/norms (GP wants me to give up)
Perceived behaviours – how well the person thinks they can do it (I can do it!!)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What 3 principles is resource allocation based on?

A

Egalitarian
Based on the idea that the NHS was founded on the requirement to provide all care that is necessary and required to everyone
Equal for everyone

Maximising
Maximise public utlity/ profits? – an act is evaluated soley in terms of its consequences – will it be beneficial?
Give to those who it is most likely to benefit the most

Libertarian
Each is responsible for their own health
The german health incentive scheme – change health behaviours and get bonuses for partipating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What are never events? What do they lead to? Egs?

A

Serious, largely preventable patient safety incidents that should not occur if the available preventative measures have been implemented

Financial penalties, affect trust reputation, CQC visits

Surgical - wrong site / retained foreign object
Psych - escape of a transfer pt
Medical - wrong route of chemo administration / opioid overdose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

A group of patients with lung cancer and a group of age matched controls are compared by looking at pack life history to assess the impact of smoking on lung cancer.

What type of study is this?
Give an example of a covariate?
What type of bias may interfere with results?

A

Retrospective case-control
E.g. work exposure, gender, type of tobacco, level of passive smoking
Selection bias e.g allocation bias (inappropriately matched controls) and information bias e.g. recall and reporting bias

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

3 benefits of cohort studies

A

Identify causation
Ethical assessment of RF (if exposure was thought to be dangerous would not be fair to do a RCT )
Allows assessment of multiple risk factors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

A new diagnostic test is being developed: 100 people known to have the disease are tested as are 200 disease-free controls. Ninety of the cases yield positive tests, as do 30 of the controls.

What is the specificity of the test?
What is the positive predictive value?
What do these mean?

A

85%
75%

85% specific means 85% of people without the disease were correctly excluded. 75% PPV means of those who had a positive result, 75% actually had the disease.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Why do you notify public health

A

So HPA can take control measures
You may be the only one to tell them
Duty of registered medical practitioners

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Role of the consultant in communicable disease control

A

Surveillance - Notification / lab data to monitor diseases

Prevention - Eg vaccination

Control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Basics of outbreak management

A

Clarify problem - make a diagnosis

Decide if its an outbreak - 2 or more related cases

Gain help - microbiologist, consultant in infectious disease, health visitors

Call an outbreak meeting

Identify cause

Control measures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

4 causes of homelessness

A

Relationship breakdown
Domestic abuse
Dispute with parents
Bereavement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Health problems faced by homeless

A

Infectious disease
Foot and teeth health
Resp problems
Violence / rape
Sexual health
Mental illness
Nutrition
Addiction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Barriers to healthcare for travellers

A

Reluctance of GPs to register them
Illiteracy
Communication difficulties
Lack of permanent site
Mistrust of professionals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Barriers to healthcare with homeless

A

Access
-Location / discrimination

Lack of integration between primary care and other agencies
-housing, social services, criminal justice

Other things on mind
-don’t prioritise health

May not know where to find help

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

What is an asylum seeker, refugee, humanitarian protection?

A

AS- someone who has made application for refugee status

R- granted asylum - usually lasts 5 years

HP - failed to get asylum but serious threat if returned - usually lasts 3 years

43
Q

Asylum seekers get?

A

Vouchers to live off
NASS support package
Access to NHS
Not allowed to work
No choice where they go

44
Q

Physical / mental health with asylum seekers ?

A

Common illnesses / those specific to country
Injuries from war / travelling
Lack of health screening / immunisations
Malnutrition
Abuse
Untreated chronic disease
Communicable disease

Mental
-PTSD
Depression
Psychosis
Self harm

45
Q

Why is safety compromised in healthcare?

A

Complexity
Resource intense
Shared responsibility

46
Q

Error classification based on Intention?
Action?
Outcome?
Context?

A

I - failure of planned action to achieve desired outcome
-skill based
-rule based - didn’t follow rules
-knowledge based

Action
-task specific - eg wrong vessel
-Generic factors - Eg wrong order / omission

Outcome
-Near miss / death

Context
-Interuptions, team factors

47
Q

2 perspectives of error? And cons

A

Person approach
-error due to individual, focuses on the unsafe act
-Anticipation of blame -> cover up

System
-Errors are due to many factors

48
Q

Strategies to reduce errors

A

Simplification and standardisation of clinical practice

Checklists

IT

Team training

Risk management programs

49
Q

Tools of risk identification

A

Incident reporting
Complaints and claims
Audits
External accreditation
Active measurement

50
Q

What is a never event

A

Preventable patient safety incident which should not occur

51
Q

4 parts of negligence

A

Is there a duty of car?
Is there a breech of this duty
Did the patient come to harm
Did the breach cause the harm

52
Q

Negligence, why do things go wrong?

A

System failure

Human factors
-Personal
Teamwork
Environment

Judgement failure
-Analytical / intuitive
-defective decision making

Neglect

Poor performance
Repeated small mistake

Misconduct

53
Q

Benefits of teaching diversity

A

Better outcomes for patients
-doctors identify their problems more accurately
-better patient adherence

More satisfying patient encounters
-more Effcient time spending
-patients more satisfied

54
Q

Benefits and risks of social media

A

Benefits
-Esablish good networks
-enagange in debates
-improve patient access to services

Risks
-Loss of personal privacy
-potential breaches of confidentiality
-risk of posts being reported

55
Q

GMC duties of a doctor

A

Make the care f your patient your first concern

protect and promote the health of the public

Provide a good standard of practice and care

Treat patients as individuals and respect their dignity

Work in partnership with patients

Be honest and open and act with integrity

56
Q

Relative risk reduction?

A

Risk unexposed - risk exposed

All over unexposed

57
Q

Name 3 things you can offer a newly presenting drug user

A

Health check
Screening for BBVs
Contraception
Smear
Immunisation
Information on drug services Eg needle exchange status

58
Q

Principles of addiction treatment

A

Harm reduction
-Advice on risky behaviour
-BBV advice
-Testing
0contraception

Brief intervention
-Explain risks / effects
-advice on controlled use
-setting limits
-cognitive based approaches

Team working
-referral to sexual health
-referral for specialist advice

59
Q

Aims of treatment for drug use

A

Reduce harm to user, family and society
Improve health
Stablise lifestyle
Reduce crime

60
Q

What is domestic abuse

A

Any pattern of controlling, threatening, or violence / abuse between those aged 16 and over who may have been family members or intimate partners

61
Q

Domestic abuse impact on health

A

Trauma

Somatic problems - Headche, GI, chronic launch , LBW / premature

Psychological / psychosexual
-PTSD, suicide,
-depression, anxiety, eating disorder
-Substance misuse

62
Q

Role of doctor in Domestic abuse

A

Healthcare records important in court

Display helpline and give contact cards

Focus on patients safety

Ask direct questions

Be non judgemental

63
Q

Risk levels and what should you do for DA ?

A

Standard - evidence does not suggest likelihood of causing serious harm

Medium - Identifiable indicators of risk of serious harm
-Unlikely to happen without change in circumstance
->Give DA abuse contact details

High - Risk of imminent harm
-> Refer to
-MARAC (multi-agency risk assessment conference) - Identifies risk and provides appropriate services
-IDVAS - supports women (a voice for MARAC)
-DHR - Domestic homicide review - if death of a persons aged over 16 and related to violence

64
Q

What tool can be used to assess risk in DA

A

DASH
Domestic, abuse, stalking, harassment

65
Q

How do you assess health equity ?

A

Inequality is assessed and must be explained to decide if its inequitable
Equality may not always be equitable

66
Q

Need, demand and supply in terms of HNA

A

Need - Ability to benefit from an intervention

Demand - What people ask for

Supply - What is provided

67
Q

What is positive and negative conditioning in relation to addiction

A

Positive - increased intensity of desire to use

Negative - do not quit as poor experiences Eg nausea

68
Q

What are the comps of drug use

A

Physical
Injection complications
Overdose
BBV
Side effects Eg constipation

Social
Criminal acts
Social exclusion
Poverty

Psychological
Guit
Cravings

69
Q

Legal level of alcohol to work in NHS / drive

A

80mg%

70
Q

3 features of Alcohol dependent syndrome

A

Need 3 features

Tolerance
Withdrawal
Neglect of other activities
Spending more time
Continued use despite negative effects
Failure to control use

CANT STOP

71
Q

Triad of wernickes

A

Ataxia
Opthamoplegia
Acute mental confusion

72
Q

Drugs for alcohol stopping abuse

A

Disurfiram
Acamprosate - GABA Blocker
Naltrexone

73
Q

What 3 parts of evaluations of health servicws

A

Structure
Process
Outcome

74
Q

Issues with health outcomes

A

Time lag

Large sample sizes needed

Data quality issues

75
Q

Quality of care - maxwell’s dimensions

A

Effectiveness
Efficiency
Equity
Accessibility
Appropriateness
Acceptability

76
Q

General framework of evaluation of heath services

A

Define the service
What are the AIMS of the service
Framework - structure, process outcome
Methodology - Qual / quantitative
Results - recommendations

77
Q

Emotional needs in elderly

A

[PISAA]

Security
Attention
Autonomy
Intimacy
Part of wider community

78
Q

Theory of planned behaviour factors?

A

intention - best predictor of change

Persons attitude to the behaviour (smoking is bad)

Subjective norms- perceived social pressures/norms (GP wants me to give up)

Perceived behaviours – how well the person thinks they can do it (I can do it!!)

[perceived behaviours are Subjective to Attitudes and Intention]

79
Q

Define
Epigenetics –
Allostasis –
Allostatic load –
Salutogenesis –
Emotional intelligence

A

Epigenetics – expression of genome depends on he environment

Allostasis – stability through change, our physiological systems have adapted to react rapidly to environmental stressors.

Allostatic load – long term overtaxation of our physiological systems leads to impaired health (stress)

Salutogenesis – favourable physiological changes secondary to experiences which promote healing and health.

Emotional intelligence – the ability to identify and manage one’s own emotions, as well as those of others

80
Q

Name 3 things primary care is for

A

Preventing illness

promoting health

working in a primary health team

Shared decision making with pts

Managing illness over time

81
Q

Name 3 parts of health improvement

A

o Inequalities
o Education
o Housing
o Employment
o Lifestyles
o Family/community
o Surveillance and monitoring of specific diseases and risk factors

82
Q

Name 2 parts of health protection

A

o Infectious diseases

o Chemicals and poisons

o Radiation

o Emergency response

o Environmental health hazards

83
Q

Name 3 parts of improving services

A

o Clinical effectiveness
o Efficiency

o Service planning

o Audit and evaluation
o Clinical governance
Equity

84
Q

Name 3 types of screening

A

• Population-based screening programmes
• Opportunistic screening
• Screening for communicable diseases
• Pre-employment and occupational medicals
• Commercially provided screening

85
Q

Define screening

A

A process which sorts out apparently well people who probably have a disease (or precursors or susceptibility to a disease) from those who probably do not.

86
Q

What is the prevention paradox

A

A preventive measure which brings much benefit to the population often offers little to each participating individual

87
Q

2 approaches to prevention

A

• Population approach – preventative measure eg. dietary salt reduction through legislation to reduce bp

• High risk approach – identify individuals above a chosen cut off and treat – eg. screening for high bp

88
Q

Name 4 criteria for screening

A

• The condition

o Important health problem
o Latent / preclinical phase
o Natural history known

• The screening test

o Suitable (sensitive, specific, inexpensive)
o Acceptable

• The treatment
o Effective
o Agreed policy on whom to treat

• The organisation and costs
o Facilities
o Costs of screening should be economically balanced in relation to healthcare spending as a whole
o Should be an ongoing process

89
Q

Name 2 bias in screening

A

Lead time bias: When screening identifies an outcome earlier than it would otherwise have been identified this results in an apparent increase in survival time, even if screening has no effect on outcome.

Length time bias: Type of bias resulting from differences in the length of time taken for a condition to progress to severe effects, that may affect the apparent efficacy of a screening method

90
Q

What do you use to describe epidemiology of a disease

A

• Time
• Place
• Person [Age Gender Class Ethnicity]

91
Q

Calc for incidence rate

A

(No.of persons who have become cases in a given time period)
/
(Total person-time at risk during that period)

92
Q

What is attributable risk

A

The rate of disease in the exposed that may be attributed to the exposure

Incidence in exposed - Unexposed

93
Q

What is relative risk

A

Ratio of risk of disease in the exposed to the risk in the unexposed

Risk in exposed / unexposed

[Shows strength of association]

94
Q

what is Relative risk reducion

A

reduction in rate of the outcome in the intervention group relative to the control group

1-Relative risk

95
Q

What is absolute risk reduction

A

Risk in unexposed – Risk in exposed

96
Q

What is number needed to treat

A

number of pts need to treat to prevent 1 outcome

1/ARR

97
Q

Name 2 criticisms of theory of planned behaviour

A

no temporal element

lack of direction / causality

98
Q

What is opportunity cost

A

to spend resources on ONE activity – means a sacrifice in terms of lost opportunity cost elsewhere

99
Q

What is economic efficiency

A

achieved when resources are allocated between activities in such a way as to maximize benefit (may not be equal/fair distribution)

  • May save more lives by trading efficiency with equity (i.e. save more lives, but may not be fair)
100
Q

What is an economic evaluation

A

comparative study of the costs and benefits of health care interventions.

101
Q

2 ways to measure benefit of interventions

A

QALY

Monetary value – how much someone is going to pay in tax/earn

natural units” (BP/pain scoref/number of cases detected)

102
Q

Cost benefit vs cost utility analysis

A

•Cost-utility analysis: outcomes measured in QALYs

•Cost-benefit analysis: outcomes measured in monetary units

103
Q

What do we look at with QALYs

A

Cost of new treatment
Effectiveness of new treatment

Dominated = cost is positive, but incremental QALYs negative,

Dominant = cost negative but incremental QALY positive