Patients With Chronic Pain: The Aspect Of Negative Body Image.

OBJECTIVE: Negative body image is an increasingly important factor in chronic pain disorders; particularly because the two conditions mutually influence each other. Our study examines body-image-related attitudes and comorbid psychic symptoms in patients with chronic pain disorders. METHODS AND MEASURES: 188 patients with chronic pain answered the Dresden body image questionnaire (DKB-35), the Hospital Anxiety and Depression Scale (HADS) and the Beck's Depression Inventory (BDI). RESULTS: The mean values of the DKB-35 subscales range between 2.24 und 3.29. The subscale "vitality" has the lowest mean value. BDI and HADS correlated significantly with the DKB-35 subscales. The subscale "body-acceptance" intercorrelated high with the two subscales "vitality" and "self-aggrandizement". CONCLUSION: Our findings verify that chronic pain is strongly associated with negative body image. The issues of vitality and psychological symptoms seem particularly central in this complex interaction. The biopsycho-social model and the avoidance-endurance approach to chronic pain offer important ideas for explanation and treatment.

Rasch analysis of the Depression, Anxiety, and Stress Scale in patients with chronic pain.

OBJECTIVE: Questionnaires are commonly used to assess and screen pain-related, psychological symptoms in patients with chronic pain. In Germany, the "German pain questionnaire" provided by the German Pain Society used for this purpose includes the Depression, Anxiety, and Stress Scale (DASS). This study aims to analyze the DASS by fitting its data to the Rasch model to test the psychometric quality. STUDY DESIGN AND SETTING: In this cross-sectional study, 932 patients with chronic pain answered the DASS. The 21-item short version was tested via Rasch analysis using the parameters threshold order, fit to the model, Differential Item Functioning, unidimensionality and reliability. RESULTS: The Rasch analysis results showed a low reliability, misfitting items, Differential Item Functioning or multidimensionality. It was necessary to remove items from the subscales to improve fit to the Rasch model. A revised depression subscale of the DASS-21 was the only scale that achieved all the required psychometric parameters. The summation of all items to a total scale was not supported. CONCLUSION: More research is required on somatic free measurement of psychological symptoms in patients with chronic pain. The results demonstrate that the development of a new instrument or a revision of existing instruments for screening of psychological symptoms in chronic pain are needed.

Patients with Chronic Pain Prefer Maintenance of Pain Treatment Despite COVID-19 Pandemic Restrictions.

BACKGROUND: Worldwide, the COVID-19 pandemic has a significant impact on daily life. First studies describe a negative impact of pandemic stressors even on individuals without previous mental illnesses. The home lockdown and the shutdown of pain clinics make it difficult for all patients to get the healthcare they need. OBJECTIVES: The aim of this study was to investigate to what extent patients with chronic pain felt affected by the pandemic and its consequences on pain treatments, focussing on the beginning of the outbreak. STUDY DESIGN: A prospective noninterventional study. SETTING: Medical University Center . METHODS: One-hundred and forty-nine patients, suffering from chronic pain, treated at a large German interdisciplinary pain center, were studied over a period of 2 months at the beginning of the pandemic. Data from patient charts and questionnaires were evaluated. Patients were asked about postponements or cancellations of pain therapy, the possible effect on pain levels, depression, anxiety and stress, and the impact of intensified hygiene measures. Results were compared to those from standardized and validated questionnaires from the same patients (German version of the depression, anxiety, and stress scale = DASS) at the time of the first contact in the pain clinic. RESULTS: Eighty-four (56.4%) patients reported cancelled or postponed treatments during the pandemic. Those chronic pain patients with delayed or cancelled treatments reported significantly more pain and psychological distress. The delay or discontinuation of treatments resulted in a deterioration of symptoms. From the patients' point of view this deterioration was unrelated to the timing of treatment and not secondary to increased hygiene measures. In both groups, patients showed a significant amelioration of the DASS values compared to the values they had at the beginning of treatment, despite the negative effects of the COVID-19 pandemic on care structures. The majority of the patients do not think that the quality of pain treatment was significantly affected by the intensified hygiene requirements. LIMITATIONS: The limitations of the study are the small number of patients because of the limitation to a short period of time at the beginning of the pandemic and the return rate of 40.2% of the study consents. CONCLUSIONS: Even in the event of a pandemic-related restriction of the care structures, patients with chronic pain benefit from pain therapy. Limitations such as the increased hygiene measures caused by the pandemic were not considered detrimental to the therapeutic measures.

Parallel short forms for the assessment of activities of daily living in cardiovascular rehabilitation patients (PADL-cardio): development and validation.

PURPOSE: To develop and validate parallel short forms for the assessment of activities of daily living in cardiac rehabilitation patients (PADL-cardio I & II). METHOD: PADL-cardio I & II were developed based on a sample of 106 patients [mean age = 57.6; standard deviation (SD) = 11.1; 72.6% males] using Rasch analysis and validated with a sample of 81 patients (mean age = 59.1; SD = 11.1; 88.9% males). All patients answered PADL-cardio and the Short Form 12 Health Survey. RESULTS: Both versions of PADL-cardio are composed of 10 items. The fit to the Rasch model was given documented by a non-significant Item-trait interaction score (PADL-cardio I: χ2 = 31.08, df = 30, p = 0.41; PADL-cardio II: χ2 = 45.6, df = 40, p = 0.25). The two versions were free of differential item functioning. Person-separation reliability was 0.72/0.78 and unidimensionality was given. The two versions correlated with r = 0.98 and the correlation between PADL-cardio and the underlying item bank was 0.99 for both versions. Concurrent validity is indicated through correlations with the Short Form 12 Health Survey (r = -0.37 to -0.40). CONCLUSION: PADL-cardio provides a short and psychometrically sound option for the assessment of activities of daily living in cardiovascular rehabilitation patients. The two versions of PADL-cardio are equivalent. Hence, they can be used to reduce practice and retest effects in repeated measurement, facilitating the longitudinal assessment of activities of daily living. Implications for Rehabilitation New parallel test forms for the assessment of activities of daily living in cardiac rehabilitation (PADL-cardio I & PADL-cardio II) are available. PADL-cardio I & II consist of 10 items and are therefore especially timesaving. Concurrent validity is given through correlations with the Short Form Health Survey 12. Therapeutic success could be determined more precisely by the parallel forms reducing practice and retest effects.

Development and validation of parallel short forms PaSA-cardio for the assessment of general anxiety in cardiovascular rehabilitation patients using Rasch analysis.

OBJECTIVE: To develop and validate parallel short forms for the assessment of general anxiety in cardiovascular rehabilitation patients, that facilitate repeated measurement over time without contamination from residual practice effect variance. DESIGN: Development of the parallel short forms using Rasch analysis. Validation study. SETTING: Cardiac rehabilitation centres in Germany. SUBJECTS: Cardiovascular rehabilitation patients. INTERVENTIONS: Not applicable. MAIN MEASURES: Parallel short forms PaSA-cardio, Hospital Anxiety and Depression Scale, Short Form Health Survey SF-12 and Structured Clinical Interview for DSM-IV Axis I Disorders. RESULTS: Each version of the parallel short forms (PaSA-cardio-I and PaSA-cardio-II) comprises ten items. The two forms fitted to the Rasch model with a non-significant item-trait interaction (PaSA-cardio-I: chi-square = 39.49, degrees of freedom = 30, probability = 0.12; PaSA-cardio-II: chi-square = 26.56, degrees of freedom = 30, probability = 0.65). Person-separation reliability was 0.75/0.76. Unidimensionality could be verified. Correlation between the two models was 0.94 and 0.95, and correlations with the underlying item bank were 0.95 and 0.93. Validity could be confirmed. The area under the curve was between 0.88 and 0.97 for PaSA-cardio-I and between 0.92 and 0.95 for PaSA-cardio-II. CONCLUSIONS: Assessment of general anxiety in cardiovascular rehabilitation patients with the PaSA-cardio was valid, economical and accurate. The two forms of the PaSA-cardio are equivalent and allow retest without contamination from residual practice effect variance.

Development and calibration of an item bank for the assessment of activities of daily living in cardiovascular patients using Rasch analysis.

BACKGROUND: To develop and calibrate the activities of daily living item bank (ADLib-cardio) as a prerequisite for a Computer-adaptive test (CAT) for the assessment of ADL in patients with cardiovascular diseases (CVD). METHODS: After pre-testing for relevance and comprehension a pool of 181 ADL items were answered on a five-point Likert scale by 720 CVD patients, who were recruited in fourteen German cardiac rehabilitation centers. To verify that the relationship between the items is due to one factor, a confirmatory factor analysis (CFA) was conducted. A Mokken analysis was computed to examine the double monotonicity (i.e. every item generates an equivalent order of person traits, and every person generates an equivalent order of item difficulties). Finally, a Rasch analysis based on the partial credit model was conducted to test for unidimensionality and to calibrate the item bank. RESULTS: Results of CFA and Mokken analysis confirmed a one factor structure and double monotonicity. In Rasch analysis, merging response categories and removing items with misfit, differential item functioning or local response dependency reduced the ADLib-cardio to 33 items. The ADLib-cardio fitted to the Rasch model with a nonsignificant item-trait interaction (chi-square = 105.42, df = 99; p = 0.31). Person-separation reliability was 0.81 and unidimensionality could be verified. CONCLUSIONS: The ADLib-cardio is the first calibrated, unidimensional item bank that allows for the assessment of ADL in rehabilitation patients with CVD. As such, it provides the basis for the development of a CAT for the assessment of ADL in patients with cardiovascular diseases. Calibrating the ADLib-cardio in other than rehabilitation cardiovascular patient settings would further increase its generalizability.

Development and evaluation of a computer adaptive test to assess anxiety in cardiovascular rehabilitation patients.

OBJECTIVE: To develop and evaluate a computer adaptive test for the assessment of anxiety in cardiovascular rehabilitation patients (ACAT-cardio) that tailors an optimal test for each patient and enables precise and time-effective measurement. DESIGN: Simulation study, validation study (against the anxiety subscale of the Hospital Anxiety and Depression Scale and the physical component summary scale of the 12-Item Short-Form Health Survey), and longitudinal study (beginning and end of rehabilitation). SETTING: Cardiac rehabilitation centers. PARTICIPANTS: Cardiovascular rehabilitation patients: simulation study sample (n=106; mean age, 57.8y; 25.5% women) and validation and longitudinal study sample (n=138; mean age, 58.6 and 57.9y, respectively; 16.7% and 12.1% women, respectively). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Hospital Anxiety and Depression Scale, 12-Item Short-Form Health Survey, and ACAT-cardio. RESULTS: The mean number of items was 9.2 with an average processing time of 1:13 minutes when an SE ≤.50 was used as a stopping rule; with an SE ≤.32, there were 28 items and a processing time of 3:47 minutes. Validity could be confirmed via correlations between .68 and .81 concerning convergent validity (ACAT-cardio vs Hospital Anxiety and Depression Scale anxiety subscale) and correlations between -.47 and -.30 concerning discriminant validity (ACAT-cardio vs 12-Item Short-Form Health Survey physical component summary scale). Sensitivity to change was moderate to high with standardized response means between .45 and .82. CONCLUSIONS: The ACAT-cardio shows good psychometric properties and provides the opportunity for an innovative and time-effective assessment of anxiety in cardiovascular rehabilitation. A more flexible stopping rule might further improve the ACAT-cardio. Additionally, testing in other cardiovascular populations would increase generalizability.

The calibrated, unidimensional anxiety item bank for cardiovascular patients provided the basis for anxiety assessment in cardiovascular rehabilitation patients.

OBJECTIVE: Computer adaptive tests (CATs) offer a flexible, test fair, and economic opportunity for accurate measurement of anxiety in patients with cardiovascular diseases (CVDs). The objective of this study was to develop and calibrate an item bank [anxiety item bank for cardiovascular patients (AIB-cardio)] as a prerequisite for an anxiety-CAT in CVD patients. STUDY DESIGN AND SETTING: After pretesting for relevance and comprehension, a pool of 155 anxiety items was answered on a five-point Likert scale. Sample consisted of 715 CVD patients, who were recruited in 14 German cardiac rehabilitation centers. A confirmatory factor analysis (CFA), Mokken analysis, and Rasch analysis were conducted. RESULTS: The results of CFA and Mokken analysis confirmed one factor structure and double monotonicity. In Rasch analysis, merging response categories and removing items with misfit, differential item functioning or local response dependency reduced the AIB-cardio to 37 items. The AIB-cardio fitted to the Rasch model with a nonsignificant item-trait interaction (chi-square, 133.89; degrees of freedom, 111; P = 0.07). Person separation reliability was 0.85, and unidimensionality could be verified. CONCLUSION: The calibrated, unidimensional AIB-cardio provides the basis for a CAT to assess anxiety in rehabilitation patients with CVD with good psychometric properties. Further testing in other cardiovascular patients is needed to increase generalizability.

Calibration of an item bank for work capacity in cardiological rehabilitation patients.

BACKGROUND: Prevention of work loss is a core objective of cardiovascular rehabilitation. However, comprehensive and economic diagnostic instruments on work limitation are missing. The present study describes the calibration of an item bank for work capacity in cardiovascular rehabilitation patients. DESIGN AND METHODS: This study was based on an item pool (166 items) for assessing work capacity in orthopaedic rehabilitation patients. A total of 349 cardiovascular rehabilitation patients were recruited from 14 German rehabilitation inpatient centres. Exploratory factor analysis was used to determine underlying dimensions of work capacity. Rasch analysis was applied to test for fit of the model, item fit, unidimensionality, particularly local independence and differential item functioning using RUMM2030. RESULTS: Two independent factors (cognitive work capacity/physical work capacity) were found. Fitting of the data to the Rasch model was initially poor (significant item-trait interaction for both factors; p < 0.001). After rescoring disordered categories, excluding misfitting items and items with differential item functioning, 20 and 18 items remained for cognitive work capacity and physical work capacity. Item-trait interaction (cognitive work capacity p = 0.24; physical work capacity p = 0.95) and person separation index (cognitive work capacity = 0.81; physical work capacity = 0.85) were satisfactory. Unidimensionality was given for both factors. CONCLUSIONS: The calibrated item bank provides the basis to assess work capacity in cardiovascular rehabilitation patients, fulfilling high psychometric standards. Further, the item bank could be either used to develop a computer adaptive test or an economic short-form questionnaire.

Development of short form questionnaires for the assessment of work capacity in cardiovascular rehabilitation patients.

OBJECTIVES: Prevention of job loss is an essential objective of cardiovascular rehabilitation. However, comprehensive and economic diagnostic instruments on work limitations are missing. The present study describes development of short form questionnaires from 2 domains of the WCIB-Cardio item banks for the assessment of work capacity in cardiovascular rehabilitation patients. MATERIALS AND METHODS: 283 cardiovascular rehabilitation patients were recruited from 14 German rehabilitation clinics. Based on the WCIB-Cardio with the domains of cognitive and physical work capacity, we developed a short form for both domains. Item selection criteria were content coverage, content appropriateness, internal consistency reliability (≥ 0.8). We used correlation of person location scores of the short forms with person location scores of the full item banks to examine the extent of measurement precision. RESULTS: For each domain of the WCIB-Cardio a short form was developed (cognitive work capacity - 14 items; physical work capacity 7 - items). In both domains psychometric properties were good (person separation index: cognitive work capacity - 0.80; physical work capacity - 0.80). Correlation meaures of the short form with the full item banks showed a high accordance of person locations for both domains (cognitive work capacity: r = 0.97; physical work capacity: r = 0.95). CONCLUSIONS: The calibrated instrument WCIB-Cardio provides the possibility to develop short form questionnaires with high psychometric quality. These short forms make it possible to monitor patient's work capacity in cardiovascular rehabilitation settings in a more economical way.