The Turkish Versions of the Revised Illness Perception Questionnaire IPQR and the Brief Illness Perc

1
The Turkish Versions of the Revised Illness
Perception Questionnaire (IPQ-R) and the Brief
Illness Perception Questionnaire (Brief IPQ)
Pilot Validation in Turkish Migrants Living in
Germany
Patrick Brzoska, Nazan Ulusoy, Yüce YIlmaz,
Oliver Razum

• University of Bielefeld, School of Public Health,
• Department of Epidemiology International Public
  Health
• 12th WCPH, Istanbul, April 30, 2009

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Introduction
Background

• Around 2.3 to 3.0 million Turkish migrants living
  in Germany
• Culture-specific illness perceptions play a role
  in health care provision
• Assessment instruments utilizing comprehensive
  frameworks exist

3
Introduction
Objectives

• Translation of the Brief IPQ into Turkish and
  adaptation for Turkish migrants with chronic
  diseases
• Pilot validation of both instruments
• Contributing to knowledge about validity issues
  in migrant health research
• Critically reflect on current practice regarding
  usage of psychometric instruments in migrant
  health research

4
Methods
Study design
Quantitative
All
patients
considered
for
All
patients
considered
for
re
-
recruitment
in
self-help groups
cruitment
in
rehabilitation
clinics
(n39)
(n70)
Patients
participating
Patients
participating
from
rehabilitation
clinics
from self-help groups
(n19 48.7)
(n63 90.0)
Total
sample
size
for
quantitative
analysis
(n82)
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Methods
Questionnaire instrument and validation

• Turkish IPQ-R as provided
• Translated Brief IPQ
• 6-page questionnaire
• Assessment of different validity types

Content validity
Content validity
IPQ-R
Brief IPQ
Factorial validity
Convergent validity
Divergent validity
Divergent validity
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Results
Sample description
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Results
IPQ-R part I
IPQ-R part I
8
Results
IPQ-R part II Factorial validity
Many cross loadings, unclean solution
Internal consistencies of the IPQ-R part II
9
Results
IPQ-R part III Factorial validity
Four-factor structure according to original
solution
AlsoPoor primary loadings, many cross loadings
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Results
Brief IPQ

• Allowed assessment of illness identity (IPQ-R
  part I)
• Brief IPQ and IPQ-R part II dimensions correlated
  as expected, however weaker than original version
• Represented the IPQ-R part III well
• Top-rated causes almost equal

The four top-rated causes as measured by part III
of the IPQ-R
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Discussion/Conclusion

• IPQ-R validity in Turkish migrants lower than in
  other IPQ-R validation studies
• Participants had problems in understanding
• Cross-loading, missings values, unclean solutions
• Less problems with migrant specific Brief IPQ

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IPQ-R part II factor structure
13
Results
IPQ-R part III Factorial validity
Revised three-factor structure
14
Results
Sample description (incl. administration type)