Reliability and validity of the Brief Illness Perception Questionnaire (B-IPQ) in individuals with a recently acquired spinal cord injury

Objective To assess the reliability and validity of the Brief Illness Perception Questionnaire (B-IPQ) and possible subscales, and to interpret Brief Illness Perception Questionnaire (B-IPQ) total scores, in individuals with a spinal cord injury. Design Cross-sectional Setting Seven Dutch rehabilitation centres Subjects Individuals with a recently acquired traumatic or non-traumatic spinal cord injury at the start of inpatient spinal cord injury rehabilitation (N = 270). Main measure The Brief Illness Perception Questionnaire (B-IPQ) consists of eight items on an individual's cognitive and emotional representation of one's health conditions. Principal component analysis was performed to identify possible Brief Illness Perception Questionnaire (B-IPQ) subscales. Validity was assessed by testing hypotheses on correlations between the Brief Illness Perception Questionnaire (B-IPQ) and other measures. Cut-off points of the Brief Illness Perception Questionnaire (B-IPQ) total score were determined. Results Mean (SD) age of participants was 60.1 (16.5) years, 188 (71%) were male, and 119 (44%) had tetraplegia. Three potential subscales were revealed. Cronbach's alpha was acceptable for only one subscale. This subscale was named ‘consequences’ and included the items ‘consequences’, ‘symptom burden’, ‘concern’, and ‘emotions’. The Brief Illness Perception Questionnaire (B-IPQ) total and the consequence subscale showed the expected strong correlations (>.50) with symptoms of anxiety and depression. Mean (SD) scores were 40.9 (12.3) on the 8-item Brief Illness Perception Questionnaire (B-IPQ) (range 0–80) and 25.1 (8.1) on the consequences subscale (range 0–40). Cut-off points for the Brief Illness Perception Questionnaire (B-IPQ) total score were determined as follows: <42 indicating low experienced threat, 42–49 indicating moderate experienced threat, and ≥50 indicating high experienced threat. Conclusion The Brief Illness Perception Questionnaire (B-IPQ) total and consequences subscale seem applicable in individuals with a spinal cord injury in the rehabilitation practice and research.

Translation and cultural validation of the Revised Illness Perception Questionnaire for Healthcare Professionals for Brazilian Portuguese

ABSTRACT Background: Multiple sclerosis progression and disability can be rated differently by healthcare professionals. Therefore, how physicians perceive the disease can impact treatment decisions. There are no previous studies on this matter. Objective: To translate and transculturally validate the Revised Illness Perception Questionnaire for Healthcare Professionals (IPQ-R HP), for use in Brazilian Portuguese. Methods: The process used to validate the IPQ-R HP was based on the steps presented in the guide proposed by Dorcas Beaton. The final version of the IPQ-R HP had 38 questions, divided into seven different dimensions to assess the patient's disease. Also, two clinical cases that were representative of real-life patients with multiple sclerosis (MS) were assembled to consider the two main profiles of the disease. We applied the questionnaire to neurologists at the Federal University of São Paulo (UNIFESP) to assess their perception of MS. These doctors also answered a brief survey to establish the profile of the interviewees. For statistical analysis, we used Bayesian CFA models and kappa statistics. Conclusions: The kappa statistics showed a general agreement of 0.4. For the Bayesian CFAs with seven-factor correlation solution, we had a poor fit for case 1 with a 95% confidence interval ranging from -52.893 to 273.797 and a PPP of 0.107. Regarding case 2, the model did not converge even after 50,000 iterations, which indicated that the specified model (i.e. seven-factor correlation solution) for case 2 was inadmissible. Thus, the IPQ-R HP questionnaire in Brazilian Portuguese has not been validated.

Vision-related Quality of Life in Patients With Glaucoma: the Role of Illness Perceptions

Purpose: To explore the predictive effect of illness perceptions on vision-related quality of life (VRQoL) in Chinese glaucoma patients.Methods: In this cross-sectional study, 97 patients with glaucoma completed the Brief Illness Perception Questionnaire (BIPQ), the Glaucoma Quality of Life-15 (GQL-15), and a questionnaire with sociodemographic and clinical information. Correlation analysis and hierarchical linear regression analysis were performed.Results: The BIPQ total score was positively correlated with the scores of the total GQL-15 and its four dimensions. Chronic comorbidities, type of glaucoma, best-corrected visual acuity (BCVA), mean defect (MD) of visual field in the better eye, and identity in the BIPQ were the critical predictors of VRQoL. Illness perceptions independently accounted for 7.8% of the variance in the VRQoL of glaucoma patients.Conclusions: Patients with stronger illness perceptions who perceive themselves as having more glaucoma symptoms are likely to experience worse VRQoL. Illness perceptions in glaucoma patients deserve clinical attention, and further studies are needed to examine whether cognitive interventions targeting illness perceptions can improve VRQoL.

Psychometric Evaluation of a Culturally Adapted Illness Perception Questionnaire for African Americans with Type 2 Diabetes

Background: Diabetes is burdensome to African Americans, who are twice as likely to be diagnosed, more likely to develop complications and are at a greater risk for death and disability than non-Hispanic whites. Medication adherence interventions are sometimes ineffective for African Americans because their unique illness perceptions are not adequately addressed. The Illness Perception Questionnaire-Revised (IPQ-R) that assesses illness perceptions has shown reliability and validity problems when used with African Americans. Thus, the study objective was to adapt the IPQ-R for African Americans and assess the validity and reliability of the culturally adapted questionnaire.Methods: Using an exploratory sequential mixed methods design, we explored African Americans’ illness perceptions qualitatively, used the results to adapt the IPQ-R, and tested the culturally adapted IPQ-R items quantitatively. The culturally adapted IPQ-R was administered to 170 African Americans with type 2 diabetes in a face-to-face survey. Content, construct, convergent, and predictive validity, including reliability was examined. Pearson and item-total correlations, item analysis, exploratory factor analysis, multiple linear regression analysis, and test-retest were conducted. Results: A new 9-factor structure for the culturally-adapted IPQ-R was identified. The new factor structure was distinct from the old factor structure of the IPQ-R. The ‘consequences’ domain from the IPQ-R occurred as two factors (external and internal consequences) while the ‘emotional representations’ domain in the IPQ-R emerged as separate ‘present’ and ‘future’ emotional representation factors. Illness coherence’ was differently conceptualized as ‘illness interpretations’ to capture additional culturally-adapted items within this domain. Most items had factor loadings greater than 0.4, with moderate factor score correlations. Necessity and concern beliefs in medicines significantly correlated with domains of the culturally-adapted IPQ-R. Pearson’s correlation values were not greater than 0.7, indicating good convergent validity. The culturally-adapted IPQ-R significantly predicted medication adherence. None of the correlation values were higher than 0.7 for the test-retest, indicating moderate reliability. Most domains of the culturally-adapted IPQ-R had Cronbach’s alpha values higher than 0.7, indicating good internal consistency. Conclusions: The results provide preliminary support for the validity of the culturally-adapted IPQ-R in African Americans with diabetes, showing good construct, convergent and predictive validity, as well as reliability.

Psychometric Testing of the Bahasa Version of the Brief Illness Perception Questionnaire among Indonesians with Type 2 Diabetes Mellitus

The Brief Illness Perception Questionnaire (B-IPQ) has been recommended to validate illness perception. Nevertheless, this measurement has yet to be validated with an assessment of the construct and convergent validities and reliability in Indonesia. Our study aimed to psychometrically test the 8-item B-IPQ among Indonesians with type 2 diabetes mellitus (T2DM). Data included 294 patients with T2DM with stratified multistage clustering. The 36-item Short Form Survey, 21-item Depression Anxiety Stress Scale, and fasting blood glucose (FBG) were used to examine convergence and divergence. The validity analysis included the construct and convergent validities with significant person correlations. Cronbach’s alpha, composite reliability (CR), and average variance extracted (AVE) were used to assess reliability. Confirmatory and exploratory factor analyses indicated a multidimensional structure, including cognitive with a five-item structure and emotional illness representation with a three-item structure, with an acceptable goodness of model fit. The tool revealed good internal consistency for the cognitive, emotional, and overall domains and was positively moderately correlated with FBG, stress, anxiety, and depression but negatively correlated with the overall quality of life and mental and physical component scores. Findings provide empirical evidence that the Bahasa version of the B-IPQ showed adequate internal consistency, exploratory and confirmatory, and thus is valid and reliable for illness perception assessments among Indonesians with T2DM.

Prediction of Death Anxiety Based on Body Image Concerns Mediated by Disease Perception in Patients With Breast Cancer

Background Fear of death and its associated anxiety are among the effective factors of mental health in patients with cancer. The present study aimed to predict death anxiety based on body image concerns mediated by disease perception in patients with breast cancer. Methods In this descriptive correlation study, Templer's Death Anxiety Scale, Littleton’s Body Image Concern Inventory, and Broadbent's Brief Illness Perception Questionnaire were used to collect data. The statistical population included all patients with breast cancer in Abadan city in 2020 who referred to medical centers for six months. A total of 200 of which were selected as the sample of the study using convenience sampling. The proposed model was evaluated using path analysis with AMOS software. Results The results showed that there was a significant association between body image and disease perception (β = 0.33, P = 0.001), and death anxiety (β = 0.57, P = 0.001), and between disease perception and death anxiety (β = 0.39, P = 0.001). There was a relationship between body image and death anxiety through the mediating role of disease perception in patients with breast cancer (P = 0.009). Conclusion According to the results of the study, the relationship of body image with death anxiety through the mediation of disease perception had a good fit and is an important step in identifying the factors affecting the death anxiety of patients with breast cancer.

Effects of Illness Perception on Self-Care Agency and Hopelessness Levels in Liver Transplant Patients: A Descriptive Cross-Sectional Study

Individuals with liver transplantation (LT), hopelessness, and lack of self-care may occur and change in the illness perceptions; however, no study has examined the effects of the illness perceptions on self-care agency and hopelessness levels in individuals with LT. This study was conducted to examine the effects of the illness perceptions of patients who had received LT surgery on their self-care agency and hopelessness levels. A descriptive cross-sectional study with a convenience sample ( N = 120) was conducted at a center in eastern Turkey. The data were collected by using the “Brief Illness Perception Questionnaire” (B-IPQ), “Self-Care Agency Scale” (SCAS), “Beck Hopelessness Scale” (BHS). In the study, the mean total B-IPQ, SCAS, BHS scores was found as 57.50 ± 3.61, 83.83 ± 9.43, 10.19 ± 3.81, respectively. There was a positive and significant relationship between the B-IPQ and BHS total scores.