TY - JOUR
T1 - Content Validity Assessment of the Revised Illness Perception Questionnaire in CKD Using Qualitative Methods
AU - Rivera, Eleanor
AU - Levoy, Kristin
AU - Clark-Cutaia, Maya N.
AU - Schrauben, Sarah
AU - Townsend, Raymond R.
AU - Rahman, Mahboob
AU - Lash, James
AU - Saunders, Milda
AU - Frazier, Rebecca
AU - Rincon-Choles, Hernan
AU - Hirschman, Karen B.
N1 - Publisher Copyright:
© 2022 by the authors.
PY - 2022/7
Y1 - 2022/7
N2 - Background: The Revised Illness Perception Questionnaire (IPQ-R) measures individuals’ unique perceptions of their illness. While psychometric properties of the IPQ-R have been demonstrated in many disease populations, its content validity has not been extensively studied in non-dialysis chronic kidney disease (CKD). Unique features of CKD (e.g., few symptoms in early stages) may impact the measurement of illness perceptions. The purpose of this study was to explore the IPQ-R content validity in a sample of CKD patients. Methods: Thirty-one participants completed the IPQ-R and were interviewed regarding their subscale scores (timeline, consequences, personal control, treatment control, coherence, cyclical, and emotions). Participants’ agreement with their scores was tallied and assessed qualitatively for themes related to the content validity of the measure. Results: Individual participant agreement with their subscale scores averaged 79% (range: 29–100%). Subscale agreement varied: timeline (100%), consequences, coherence, and emotion (83% each), cyclical (75%), personal control (65%), and treatment control (64%). A qualitative exploration of disagreement responses revealed concerns with the relevance and comprehensibility of personal control and treatment control. Conclusions: Some IPQ-R subscales may pose content validity concerns in the non-dialysis CKD population. Item modification for comprehensibility (personal control) and relevance (treatment control) should be considered. Future studies should explore the impact of a patient’s symptom experience on IPQ-R validity, especially in populations like CKD with a higher proportion of asymptomatic patients.
AB - Background: The Revised Illness Perception Questionnaire (IPQ-R) measures individuals’ unique perceptions of their illness. While psychometric properties of the IPQ-R have been demonstrated in many disease populations, its content validity has not been extensively studied in non-dialysis chronic kidney disease (CKD). Unique features of CKD (e.g., few symptoms in early stages) may impact the measurement of illness perceptions. The purpose of this study was to explore the IPQ-R content validity in a sample of CKD patients. Methods: Thirty-one participants completed the IPQ-R and were interviewed regarding their subscale scores (timeline, consequences, personal control, treatment control, coherence, cyclical, and emotions). Participants’ agreement with their scores was tallied and assessed qualitatively for themes related to the content validity of the measure. Results: Individual participant agreement with their subscale scores averaged 79% (range: 29–100%). Subscale agreement varied: timeline (100%), consequences, coherence, and emotion (83% each), cyclical (75%), personal control (65%), and treatment control (64%). A qualitative exploration of disagreement responses revealed concerns with the relevance and comprehensibility of personal control and treatment control. Conclusions: Some IPQ-R subscales may pose content validity concerns in the non-dialysis CKD population. Item modification for comprehensibility (personal control) and relevance (treatment control) should be considered. Future studies should explore the impact of a patient’s symptom experience on IPQ-R validity, especially in populations like CKD with a higher proportion of asymptomatic patients.
KW - chronic kidney disease
KW - content validity
KW - illness perception questionnaire
KW - illness perceptions
KW - illness representation
KW - psychometric testing
UR - http://www.scopus.com/inward/record.url?scp=85135101305&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85135101305&partnerID=8YFLogxK
U2 - 10.3390/ijerph19148654
DO - 10.3390/ijerph19148654
M3 - Article
C2 - 35886505
AN - SCOPUS:85135101305
SN - 1661-7827
VL - 19
JO - International journal of environmental research and public health
JF - International journal of environmental research and public health
IS - 14
M1 - 8654
ER -