psychosocial consequences of false-positive screening results - breast cancer as an example
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Psychosocial consequences of false-positive screening results - breast cancer as an example. John Brodersen MD, GP, PhD The Department of General Practice Institute of Public Health Centre of Health and Society University of Copenhagen. Content of presentation. Medical screening - PowerPoint PPT PresentationTRANSCRIPT
Psychosocial consequences of false-positive screening results - breast cancer as an example
John Brodersen MD, GP, PhD
The Department of General PracticeInstitute of Public Health
Centre of Health and SocietyUniversity of Copenhagen
Psychosocial consequences of false-positive screening results - breast cancer as an example 2
Content of presentation
Medical screening Breast cancer screening Psychosocial consequences Conclusions and perspectives
Psychosocial consequences of false-positive screening results - breast cancer as an example 3
Content of presentation
Medical screening Breast cancer screening Psychosocial consequences Conclusions and perspectives
Psychosocial consequences of false-positive screening results - breast cancer as an example 4
Screening the coal
Psychosocial consequences of false-positive screening results - breast cancer as an example 5
Outcome of medical screening
Disease
Healthy
Positive screening result
True positive False positive
Negative screening result
False negative True negative
Psychosocial consequences of false-positive screening results - breast cancer as an example 6
Outcome of medical screening
Disease
Healthy
Positive screening result
True positive
False positive ‘False alarm’
Negative screening result
False negative
True negative
Psychosocial consequences of false-positive screening results - breast cancer as an example 7
Outcome of medical screening
Healthy
Disease
Arbitrary scale
Psychosocial consequences of false-positive screening results - breast cancer as an example 8
Content of presentation
Medical screening Breast cancer screening Psychosocial consequences Conclusions and perspectives
Psychosocial consequences of false-positive screening results - breast cancer as an example 9
Proportion
2,000 women, age 50 – 69, screened every second year for 10 years – 5 rounds:
1 death of breast cancer prevented> 200 false-positive result
1:200
P. C. Gotzsche and M. Nielsen. Screening for breast cancer with mammography. Cochrane Database.Syst.Rev. (4):CD001877, 2006.
Psychosocial consequences of false-positive screening results - breast cancer as an example 10
Content of presentation
Medical screening Breast cancer screening Psychosocial consequences Conclusions and perspectives
Psychosocial consequences of false-positive screening results - breast cancer as an example 11
Adequacy of measurement
23 studies identified Most commonly used measures:
The General Health Questionnaire (GHQ)The Hospital Anxiety and Depression Scale (HADS)The Psychological Consequences Questionnaire (PCQ)The State-Trait Anxiety Inventory (STAI)
These 4 measures used in 17 studies
Brodersen J., Thorsen H., Cockburn J. The adequacy of measurement of short and long term consequences of false-positive screening mammography. Review. Journal of Medical Screening 11 (1):39-44. 2004.
Psychosocial consequences of false-positive screening results - breast cancer as an example 12
Focus groups - content validity
Examinations Ultrasound & clini-cal mammography
Plus needle biopsy
Plus surgical biopsy
No. of women 5 7 7
Mean age 58.2 58.7 55.8
Examinations Plus earlyrecall
Plus needlebiopsy
Plus surgical biopsy
No. of women 5 5 7
Mean age 59.6 53.6 57.7
J. Brodersen and H. Thorsen. Consequences Of Screening in Breast Cancer (COS-BC): development of a questionnaire. Scand.J Prim.Health Care 26 (4):251-256, 2008.
Psychosocial consequences of false-positive screening results - breast cancer as an example 13
Result from interviews
Part I: 33 items on negative psychosocial consequences
At invitationAt screeningAfter diagnosis
Part II: 13 items on long-term psychosocial consequences
After diagnosisJ. Brodersen and H. Thorsen. Consequences Of Screening in Breast Cancer (COS-BC): development of a questionnaire. Scand.J Prim.Health Care 26 (4):251-256, 2008.
Psychosocial consequences of false-positive screening results - breast cancer as an example 14
Statistical methods
ReliabilityCronbach’s alphaPerson Separation IndexTest-retest (part II)
ValidityRasch analysisConfirmatory factor analysisConcurrent validityKnow group validity
J. Brodersen, H. Thorsen, and S. Kreiner. Validation of a condition-specific measure for women having an abnormal screening mammography. Value in Health 10 (4):294-304, 2007.
Psychosocial consequences of false-positive screening results - breast cancer as an example 15
COS-BC part I
Psychosocial consequences of false positive screening results
Anxiety – 6 items
Behavioural aspects - 7 items
Sense of dejection – 6 items
Sleep problems - 4 items
Breast examination - 2 items
Sexuality - 2 items
Single items – 3 items
J. Brodersen, H. Thorsen, and S. Kreiner. Validation of a condition-specific measure for women having an abnormal screening mammography. Value in Health 10 (4):294-304, 2007.
Psychosocial consequences of false-positive screening results - breast cancer as an example 16
COS-BC part II
Psychosocial consequences of false positive screening results
Anxious about/belief in (not) having breast cancer – 2 itemsMore or less relax - 2 itemsSocial relationship – 3 itemsExistential values - 6 items
J. Brodersen. Measuring psychosocial consequences of false-positive screening results - breast cancer as an example, Department of General Practice, Institute of Public Health, Faculty of Health Sciences, University of Copenhagen:Månedsskrift for Praktisk Lægegerning, Copenhagen. ISBN: 87-88638-36-7, 2006.
Psychosocial consequences of false-positive screening results - breast cancer as an example 17
Scores of anxiety (0-18)
Group Mean score
Abnormal screening 6.39
Breast cancer 7.38
False-positive 3.04
Undiagnosed 4.38
Normal screening 0.97
J. Brodersen, H. Thorsen, and S. Kreiner. Validation of a condition-specific measure for women having an abnormal screening mammography. Value in Health 10 (4):294-304, 2007.
Psychosocial consequences of false-positive screening results - breast cancer as an example 18
5 response category
After the examinations I have thought about the broader aspects of life:
Much less Less The same as
before More Much
more
Fewer thoughts about
life
More thoughts about life
Psychosocial consequences of false-positive screening results - breast cancer as an example 19
Know group validity - 1
Breast cancer - anxiety/mistrust
0%
20%
40%
60%
80%
100%
muchgreater
greater same asbefore
less muchless
Response categories
Normal
False positive
Psychosocial consequences of false-positive screening results - breast cancer as an example 20
Know group validity - 2
Feeling relaxed and calm
0%
20%
40%
60%
80%
100%
muchless
less same asbefore
greater muchgreater
Response categories
Normal
False positive
Psychosocial consequences of false-positive screening results - breast cancer as an example 21
Know group validity - 3
Relation to social network
0%
20%
40%
60%
80%
100%
much less less same asbefore
greater muchgreater
Response categories
Normal
False positive
Psychosocial consequences of false-positive screening results - breast cancer as an example 22
Know group validity - 4
Existential values
0%
20%
40%
60%
80%
100%
muchless
less same asbefore
greater muchgreater
Response categories
Normal
False positive
Psychosocial consequences of false-positive screening results - breast cancer as an example 23
Know group validity - 4
Existential values
0%
20%
40%
60%
80%
100%
muchless
less same asbefore
greater muchgreater
Response categories
Normal
False positive
Psychosocial consequences of false-positive screening results - breast cancer as an example 24
Content of presentation
Medical screening Breast cancer screening Psychosocial consequences Conclusions and perspectives
Psychosocial consequences of false-positive screening results - breast cancer as an example 25
Conclusion 1
The conclusions drawn from previously conducted studies regarding long-term psychosocial consequences of false-positive screening mammography should remain tentative
Psychosocial consequences of false-positive screening results - breast cancer as an example 26
Conclusion 2a
A valid and reliable condition-specific instrument measuring psychosocial consequences of abnormal and false-positive screening mammography has been established
Psychosocial consequences of false-positive screening results - breast cancer as an example 27
Conclusion 2b
Consequences of Screening on Breast Cancer (COS-BC)1.Psychosocial consequences of
abnormal and false-positive screening mammography
2.Long-term psychosocial consequences of false-positive screening mammography
Psychosocial consequences of false-positive screening results - breast cancer as an example 28
Conclusion 3
There are substantial negative psychosocial consequences associated with having an abnormal screening mammography later confirmed to be false-positive
Psychosocial consequences of false-positive screening results - breast cancer as an example 29
Implications for practice
Letters and folders posted at invitation to screening should contain information on the negative psychosocial consequences arising from abnormal and false-positive screening results
Psychosocial consequences of false-positive screening results - breast cancer as an example 30
Implications for research
Need for valid instruments in the area of psychosocial consequences of screening for any cancers
To establish core-items and core-subscales relevant for any kind of cancer screening
Psychosocial consequences of false-positive screening results - breast cancer as an example 31
Consequences Of Screening
Lung cancer P1: 17 items P2: 4 items
Cervical cancer P1: 40 items
Breast cancer P1: 4 items
Core P1: 26 itemsP2: 22 items