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1. Depression and the Placebo Effect Psychogenic Illness and Suggestion Hypnosis, Pain Reduction, and Adherence with Medical Instruction Irving Kirsch
Faculty of Health and Social Work
University of Plymouth
2. Common Theme: Suggestion Effects in Health Psychology
3. Depression and the Placebo Effect Irving Kirsch
Faculty of Health and Social Work
University of Plymouth
4. Suicides in Adults(Healy, 2003)
5. Suicides in Adults(Healy, 2003)
6. Are Antidepressants Effective? Listening to Prozac
But Hearing Placebo
(Kirsch & Sapirstein, 1999)
7. Pre-post Effect Sizes for Drug, Placebo, and No-treatment Controls 75% dup plac
25% dup NT
-> 50% plac, 25% nat hist; 25% drug
But reason suspect much or all 25% also plac effect
OVERHEAD: r=.9075% dup plac
25% dup NT
-> 50% plac, 25% nat hist; 25% drug
But reason suspect much or all 25% also plac effect
OVERHEAD: r=.90
8. Partitioning the Antidepressant Drug Response 75% dup plac
25% dup NT
-> 50% plac, 25% nat hist; 25% drug
But reason suspect much or all 25% also plac effect
OVERHEAD: r=.9075% dup plac
25% dup NT
-> 50% plac, 25% nat hist; 25% drug
But reason suspect much or all 25% also plac effect
OVERHEAD: r=.90
9. “This can’t be true”
10. The Emperor’s New Drugs:An Analysis of the FDA Data Set Fluoxetine (Prozac)
Paroxetine (Seroxat/Paxil)
Sertraline (Lustral/Zoloft)
Venlafaxine (Effexor)
Nefazodone (Dutonin/Serzone)
Citalopram (Cipramil/Celexa)
11. Advantages of the FDA data set Includes unpublished trials
Same outcome measure (HAM-D)
12. % of Trials Showing Significant Drug/Placebo Differences
13. Improvement Across Drugs Duplication by Placebo = 82%
Mean HAM-D change = 1.80 points
14. FDA Dose-response Studies(10 Trials) How did the drugs get approved?
Need two trials with sig diffs
LOCF data
Usually considered more stringent, but isn’t
People who show early improvement (probably a placebo effect), but can’t tolerate side effects
should be considered tx failures
ANALYSIS OF LOCF vs OC
Ignore degree of diff, only ask if stat significantHow did the drugs get approved?
Need two trials with sig diffs
LOCF data
Usually considered more stringent, but isn’t
People who show early improvement (probably a placebo effect), but can’t tolerate side effects
should be considered tx failures
ANALYSIS OF LOCF vs OC
Ignore degree of diff, only ask if stat significant
15. Findings replicated by NICE
Conclusion:
The response to antidepressant medication is primarily a placebo effect
16. Psychogenic Illness and Suggestion Irving Kirsch
Faculty of Health and Social Work
University of Plymouth
17. Mass Psychogenic Illness Occurrence of physical symptoms in the absence of an identifiable pathogen
Perceived threat of biochemical terrorism makes MPI more likely
‘Psychogenic’ implies that symptoms are produced by psychological factors
Diagnosis based mostly on failure to find a physical pathogen
18. Our StudyPurposes: Can typical MPI symptoms be produced in the lab?
Investigate two psychological factors
Expectancy
Contagion by observation
19. Instructions to Participants “I am a Research Assistant and part of a Medical Psychology Research Team that is studying a suspected environmental toxin. This substance has been reported to produce a number of temporary symptoms in workplaces in the Northeast. The most frequently reported symptoms are headache, nausea, itchy skin and drowsiness. These symptoms seem to develop very quickly after exposure to this substance, but they are relatively mild, and they do not last very long--rarely more than an hour or so.”
20. Target symptoms
Headache
Nausea
Itchy skin
Drowsiness
Non-target symptoms
Watery eyes
Scratchy throat
Chest tightness
Breathing difficulty
21. Design
22. Effect of Inhalation
23. Effect of Observation
24. Conclusions Expectancy can cause people to experience psychogenic symptoms.
Effect of observation remains unclear
CONCLUSIONS
Expectancy
Expectancy can cause people to experience psychogenic symptoms.
Expectancy effected both Target and non-target symptoms, but effected Target symptoms to a greater degree
There was a nocebo effect. This seems to have relevance to MPI
Modeling
Modeling did not significantly add to reported symptomology.
Is This due to our methodology?
Perhaps this tightly controlled experimental environment did not sufficiently replicate the experience of an MPI. For example,
1. There was only one confederate experiencing symptoms, not a group of people.
2. People are more likely to experience symptoms in MPI if they know the person who is displaying symptoms. We did not attempt to replicate this.
CONCLUSIONS
Expectancy
Expectancy can cause people to experience psychogenic symptoms.
Expectancy effected both Target and non-target symptoms, but effected Target symptoms to a greater degree
There was a nocebo effect. This seems to have relevance to MPI
Modeling
Modeling did not significantly add to reported symptomology.
Is This due to our methodology?
Perhaps this tightly controlled experimental environment did not sufficiently replicate the experience of an MPI. For example,
1. There was only one confederate experiencing symptoms, not a group of people.
2. People are more likely to experience symptoms in MPI if they know the person who is displaying symptoms. We did not attempt to replicate this.
25. Hypnosis, Pain Reduction, and Adherence with Medical Instruction Irving Kirsch
Faculty of Health and Social Work
University of Plymouth
26. Hypnotic analgesia Correlated with suggestibility
75% show substantial relief
Reduces need for medication
Accompanied by changes in the brain
Surgery without drugs
But
Seldom used
27. The Effects of Hypnotic and Nonhypnotic Imaginative Suggestion on Pain (Milling, Kirsch, Allen, & Reutenauer, in press)
28. Pain Stimulus Forgione-Barber Strain Gauge Pain Stimulator
29. Suggestion: Imagine that your hand is insensitive and numb, as if you were wearing a thick glove
30. Procedure
31. Pain Reduction by Hypnotic and Nonhypnotic SuggestionMilling et al. (in press)
32. Pain Reduction by Hypnotic and Nonhypnotic SuggestionMilling et al. (in press)
33. Hypnosis and Adherence Types of non-adherence
Voluntary
Involuntary
Methods of enhancing voluntary adherence
Specifying time and place
Hypnotic suggestion to enhance memory
“The idea of…will come easily to mind”
34. Study 1Compliance with Pill Taking Instructions
35. Study 2Compliance with Exercise Instructions
36. Conclusions Suggestion can reduce pain and enhance adherence to medical instruction
The effect on pain does not require the induction of hypnosis
The effect on compliance depends on the person’s suggestibility
37. Mid-life women’s health and the menopause Pamela A. Jacobs
School of Psychology
University of Plymouth
38. Aim & Studies Using a quality of life perspective – to examine the psycho-social aspects of women’s mid-life health during the menopause.
To evaluate the impact of declining sex hormone levels on memory in elderly women
Qualitative methods : focus groups and interviews
Cross-sectional questionnaire based studies
Planning stage of experimental study
Recruitment through health authority patient lists. 2 large scale studies: SW and national.
Advertising – women’s magazines, libraries, chemists, health food shops, university, social services.
random sample from telephone directories
39. Measures MQOL scale: 48 items, 7 domains, energy, sleep, appetite, cognition, mood, social interaction, symptom impact.
Minor health complaints: 5 domains, respiratory, atopic, gastro, Indicators, fungal.
Diet
Prescription drug use in the last 2 months
Physical fitness indicator
Relevant medical history i.e. hysterectomy, history of menstrual cycle problems.
History of HRT use
Menopausal status and SRMS
Psychological measures; LOC & Stress level indicator
CAM use scale
Biographical information i.e. employment, education, age, marital status
40. Our Previous Studies Development of a Menopausal Quality of Life Scale. Domains: sleep, energy, social interaction, symptom impact, cognition, mood, appetite. Alpha scores ranged from .69 - .91 for each domain. Convergent validity r =.66.
Determinants of quality of life: work status, health status and menopausal status,.
Determinants of HRT use: menopausal status, QOL ( symptom impact, cognition), hysterectomy, health status.
41. Previous Studies Many women took HRT for only a short time, mean use 8 months range of 2 weeks to 8 years.
Role of Hormones and prescription drugs in QOL
Prescription drug use was higher in HRT user groups than non users
HRT users who also took prescription based drugs had significantly lower mean length of HRT use.
Significant association between length of HRT use and health
Those who took HRT plus SSRI’s reported significantly better QOL than those who took SSRI’s alone
42. Current Studies Mid-life women’s use of Complementary & Alternative Medicine to improve QOL
Mid-life women’s diet and minor health complaints – analysis of data
Health scares and hormone use – how have women and GP’s reacted to information about HRT?
43. Future studies The impact of hormone levels on cognitive functioning.
System effect ( attention) or specific effects ( verbal memory )
Window of opportunity for supplement use to bring beneficial effects?
Do all estrogens have the same effect on memory?
44. Respiratory Psychology: The LINQ Plymouth Respiratory Research Group:
The LINQ group: Rupert Jones, Michael Hyland, Karen Hanney
45. History Focus groups on compliance
Driven by clinical need
Information needs versus knowledge
Iterative process of questionnaire construct using focus groups
QUESTIONS CONSTRUCTED BY PATIENTS
Quantitative examination of the data
46. Sample question Which of the following statements best describes what will happen to you over the next few years? TICK ONE ONLY
Now that my disease is being treated, I will probably
get better
Now that my disease is being treated, I will probably
stay the same
I will get worse
I have no idea
47. Sample question Are you satisfied with the information doctors and nurses have given you about your inhalers or medicines? TICK ONE ONLY
I understand everything I need to know
I understand what I have been told but I would like to
know more
I am slightly confused about my medicines
I am very confused about my medicines
48. Sample question What sentence best describes what you have been told to do if your breathing gets worse? TICK ONE ONLY
"(e.g., take two puffs instead of one)"
I have been told what to do and the doctor/nurse has given me written instructions
I have been told but it is not written on paper
I haven't been told but I know what to do
I haven't been told and I don’t know what to do
49. Sample question Have you been told when you should call an ambulance if your breathing worsens? TICK ONE ONLY
I have been told what to do and the doctor/nurse has given me written instructions
I have been told but it isn't written on paper
I haven't been told but I know what to do
I haven't been told and I am uncertain when an
ambulance should be called
50. Sample question Has a doctor or nurse told you how much physical activity you should do?
Yes and I know what to do
Yes but I am unsure what to do
Yes but I am unable to do it
No
51. Sample question How much physical activity do you do?
As little as possible
I make an effort
I push myself as much as I can
52. Scoring: 5 domains disease knowledge (DK),
medicines (MED),
self-management (SM),
smoking (S),
exercise (EX)
diet (D)
53. Findings High levels of information needs
Information needs related to staff contact
Specialist nurse
Inpatient
Physiotherapist
Rehabilitation
54. Future National collaboration
International collaboration
Italy
Japan
Evaluation of rehabilitation
Outcome
Information needs
55. Acknowledgements Thanks to Boehringer Ingelheim
56. Research areas 1. Posttraumatic stress disorder (PTSD)
2. Stress/burnout
Posttraumatic stress disorder (PTSD)
To investigate the extent to which people experience PTSD responses following traumatic events (e.g. accidents, injury, life-threatening illness)
To identify whether personality factors and coping strategies are risk factors associated with these traumatic reactions
57. PTSD following technological disasters: personality and coping Completed and published
King’s Cross fire
Marchioness disaster
Train crash (Stafford) & plane crash (Coventry)
General findings:
39% high PTSD severity
Neuroticism and emotion-focused coping were associated with PTSD symptoms and general health problems.
58. PTSD following spinal cord injury: personality and coping Submitted to publication
The relationship between locus of control and post-SCI PTSD
Type of spinal cord injury, trauma recency and previous traumatic life events in patients
General findings:
44% PTSD
Internal locus of control was associated with post-SCI PTSD
external locus of control was associated with general health problems
59. PTSD following myocardial infarction: personality and coping Completed
The relationship between emotion/problem-focused coping, big five personality factors and post-MI PTSD
General findings:
31% PTSD
problem-focused coping was associated with post-MI PTSD
Patients with high severity of post-MI PTSD tend to be more neurotic and less agreeable.
60. PTSD following asthma attack: personality and coping Completed
The relationship between alexithymia and post-asthma attack PTSD
General findings:
2% high PTSD severity
Severity of asthma attack was a predictor to PTSD
no relationship between alexithymia traits and post-asthma attack PTSD was found
61. PTSD following anaphylactic shock: personality and coping Completed
The relationship between emotion/focused coping and post-anaphylactic shock PTSD
General findings:
13% high PTSD severity
Emotion-focused coping was associated with PTSD
62. PTSD following homicide: personality and coping Completed
The relationship between dissociation and PTSD following the act of homicide
59% high PTSD severity
High dissociation was associated with high PTSD symptoms
63. PTSD and ongoing studies PTSD and chronic obstructive pulmonary disease (COPD): interface between previous traumatic experiences, PTSD severity and rehabilitation
PTSD and falling: interface between disability, fear of falling and PTSD severity
PTSD and urticaria: perceived stress, previous traumatic life events, coping, personality and severity of urticaia
PTSD and stroke: coping and personality (cross-cultural study)
64. Health Psychology: Complementary and Alternative Medicine (CAM) Michael Hyland, Janet Richardson, Jennifer Millward, Alistair McConnon
65. The problem Double blinded clinical trials
Clinical experience
Specific effects
Non-specific effects
66. Theoretical rationale Entanglement theory versus the therapeutic alliance
Expectancy, therapeutic bond shared goals
Application of quantum mechanics to macro-systems
Paradigm shift
Methodological problems
Explains absence/small effects in RCTs but also therapeutic effects in ‘real life’
Therapists are more important than therapies
67. Studies Studies conducted in Freiburg
Spatially separated people, electromagnetic and acoustic shielding
EEG response of one person to stimulus presentation of another
69. Flower essence studies Personality predicts outcome after controlling for expectancy
70. Therapist effect studies Difficult to conduct
Some therapists have consistently good non-specific effects (psychotherapy literature)
What are the contextual factors that affect medical treatment
What are the contextual factors that are important in CAM?