Boudien Krol

The Groningen activity restriction scale for measuring disability: its utility in international comparisons

OBJECTIVES The Groningen Activity Restriction Scale (GARS) is a non-disease-specific instrument to measure disability in activities of daily living (ADL) and instrumental activities of daily living (IADL). It was developed in studies of Dutch samples consisting of elderly or chronically ill people. The psychometric properties of the GARS demonstrated in these studies were highly satisfactory. This paper addresses the psychometric properties of the GARS across countries. METHODS Data of 623 patients with recently diagnosed rheumatoid arthritis from four European countries were analyzed by means of a principal components analysis and a Mokken scale analysis for polychotomous items. RESULTS The results of the analyses were highly satisfactory: there was one strong and reliable general factor representing one underlying dimension of disability in ADL and IADL, and there was a clear hierarchical ordering of the items included in the GARS. The validity of the GARS was strongly suggested by the pattern of associations of the GARS with age, sex, and other existing health status measures. CONCLUSIONS The psychometric characteristics of the GARS, which measures disability in ADL and IADL simultaneously, make this instrument very useful for comparative research across countries.

WORK DISABILITY IN EARLY RHEUMATOID-ARTHRITIS

OBJECTIVE--To assess the impact of early rheumatoid arthritis (RA) on work status. METHODS--The employment status of 119 patients who had jobs before the onset of RA was examined. Patients with work disability were compared with those without, for several disease characteristics, therapeutic regimen, and educational level and age. RESULTS--Sixty two percent of the patients, particularly manual workers, reported some kind of work disability (7% worked less, 13% were on sick leave, and 42% had quit their jobs). Forty five patients (38%) stated that they were working without any restrictions; however, only 12 of this latter group (10% of the total group) had not encountered any changes at all within their jobs. The patients who reported work disability had a lower level of education and scored higher for several disease characteristics (erythrocyte sedimentation rate (ESR), joint tenderness, Health Assessment Questionnaire (HAQ), and Groningen Activity Restriction Scale) and were provided with more medication compared with patients without work disability, though only the educational level, disease duration, HAQ and ESR contributed significantly to work disability in logistic regression analysis. CONCLUSION--Even at an early stage, RA has a considerable impact on work status. This study indicates that work disability is dependent on disease characteristics and on the educational level of the patient.

An international study on measuring social support: Interactions and satisfaction

Recently, a new instrument was developed to measure social support. It consists of two parts; the Social Support Questionnaire for Transactions (SSQT) and the Social Support Questionnaire for Satisfaction with the supportive transactions (SSQS). The SSQT measures the number of supportive interactions and has proved to have good psychometric properties. From the taxonomy that was used for the present study, it results that social support in general consists of two aspects. There are, on the one hand, actual supportive transactions and, on the other hand, the perception of being supported or the satisfaction with the social support provided. In the present study, two research questions were addressed. The first concerned the psychometric properties of the SSQS, measuring the individuals satisfaction with the supportive interactions provided. Secondly, the relative contribution of both supportive interactions (the SSQT) and the satisfaction with the support provided (the SSQS) were assessed, in explaining the level of health related quality of life outcome. The data of 744 rheumatoid arthritis (RA) patients from four different countries (116 French, 238 Norwegian, 98 Swedish and 292 Dutch patients) were used in the present study. At the entry of the study, all patients fulfilled four out of seven American Rheumatism Association (ARA) criteria and had a disease duration of 4 years or less. The results of the study indicate that the SSQS has good psychometric properties across countries. Cronbachs alpha for the emotional support scales was 0.80 or more, and for the instrumental support subscales around 0.60. The standardized regression coefficients demonstrated that, compared to supportive interactions, support satisfaction was more relevant in explaining health related quality of life measures, although it is recommended that the SSQT and SSQS be used to complement each other.

The effects of occupational interventions on reduction of musculoskeletal symptoms in the nursing profession

The objective of the review was to gain more insight into the effects of occupational interventions for primary prevention of musculoskeletal symptoms in healthcare workers. The Cochrane Collaboration methodological guidelines for systematic reviews functioned as a starting point. Thirteen studies meeting the inclusion criteria were analysed for methodological quality and effects. Eight outcome effect areas were established and defined as areas in which an effect had been determined in at least two studies. A method based on levels of scientific evidence was then used to synthesize the information available. Strong scientific evidence for the beneficial effect of occupational interventions was found for the outcome effect areas physical discomfort, technical performance of transfers and frequency of manual lifting. Insufficient evidence was found for the effect areas absenteeism due to musculoskeletal problems, musculoskeletal symptoms, fatigue, perceived physical load and knowledge of risk factors at work and ergonomic principles. Training and education combined with an ergonomic intervention were found to be effective.

Work-related determinants of return to work of employees on long-term sickness absence

Purpose. The aim of the study is to identify work-related determinants of return to work (RTW) of employees who are on long-term sickness absence. Method. The study was based on a sample of 926 employees on sickness absence (maximum duration of 12 weeks). The employees filled out a baseline questionnaire and were subsequently followed until the 10th month after listing sick. Cox proportional hazards regression analyses were used to identify determinants of RTW. Results. Working in one of the vocational sectors public administration, construction, financial and commercial services, transport, or education (P = 0.00) and having low co-worker support (P = 0.01) were related to longer duration to RTW in the mulitvariate model. Having low supervisor support (P = 0.01) was associated with a higher RTW rate. Conclusions. Vocational sector is a strong predictor of RTW. Especially employees from the sector education are slow as to RTW. The observed association between low supervisor support and RTW was unexpected. However, the study confirms earlier research on the association between low co-worker support and RTW.

Social support, rheumatoid arthritis and quality of life: concepts, measurement and research

In recent years, medical technology has improved considerably and the possibilities to replace destroyed parts of the body that have been affected by rheumatoid arthritis (RA), have grown also. However, the availability and application of advanced techniques does not automatically entail an improvement of quality of life of individuals. Although the physical (dis)ability of RA patients very often leads to certain restrictions, it is not the only element in the evaluation of life-as-a-whole. The way in which the RA-patient copes with the uncertainty of tomorrow and the management of pain and fatigue is another important element in evaluating quality of life. Beside personality factors, social network and social support are regarded to play an important role in this respect and subsequently in the well-being of individuals in general, and especially where it concerns individuals suffering from a chronic disease. Today, a growing number of evidence of the beneficial impact of social support is available some of which are discussed.

Structure and reliability of Ware's Patient Satisfaction Questionnaire III: patients' satisfaction with oncological care in the Netherlands.

Background. The present study examined the structure and reliability of the Dutch version of the Patient Satisfaction Questionnaire III (PSQ III). The PSQ III was designed to measure technical competence, interpersonal manner, communication, time spent with doctor, financial aspects, and access to care. In the Dutch version, the financial items were left aside because these are not appropriate for the Dutch socialized system. Objectives. The main objectives were to assess response bias, the number of dimensions needed to describe the PSQ III items, and the reliability of the scales. In addition, distribution characteristics were examined and norm scores to interpret satisfaction scores in an oncological setting were presented. Research Design. A cross-sectional survey study. Subjects. The study was comprised of 1594 cancer patients from eight hospitals. Measures. The Dutch version of the PSQ III. Results. Approximately 14% of the respondents were found to demonstrate considerable response bias. Confirmative factor analyses were performed to test three theoretical models with a varying number of dimensions among those participants who did not demonstrate response bias. The original structure did not fit the data well, but support was found for a three-factor model (with interpersonal manner, communication, and time spent with doctor loading on one factor instead of separate factors) and a one-dimensional model. Conclusions. The PSQ III seems to be an appropriate measure of cancer patients’ satisfaction, with the note that the number of dimensions may vary for different patient groups and/or care settings and that it is important to be aware of response bias.

Social participation and employment status after kidney transplantation: A systematic review

Objective: To summarize and assess literature regarding social participation of recipients after successful kidney transplantation.Methods: A systematic review including a literature search in Medline (1980–2003) and five other databases, and assessment of methodological quality of selected studies by two reviewers applying a checklist of twelve criteria. Results: Seventeen studies out of 1443 identified references were selected. Quality scores for internal validity ranged from 0% to 50% (median 20%). Employment was the most used indicator of social participation and two studies briefly reported on vacation and recreation. Employment rate ranged from 18% to 82%, however differences in defining categories of employment or lack of description were present. Study populations were heterogeneous with regard to demographic and clinical characteristics. Three studies identified pre-transplant employment status as predictor of post-transplant employment. Other potential risk factors were not consistent across studies. Conclusion: Measurement of social participation focuses mainly on employment status. Quality assessment revealed shortcomings in reporting and validity of studies, whereby valid conclusions regarding the degree of social participation after kidney transplantation cannot be drawn. Future research should supplement the focus on employment status by examining other aspects of social participation as well as potential risk factors.

Self-rated health as a predictor of return to work among employees on long-term sickness absence

Aims. The aim of the present study is to identify self-rated health predictors of return to work (RTW) within the study population as a whole as well as in three subgroups, namely musculoskeletal complaints, other physical health complaints, and psychological complaints. Methods. The study was based on a sample of 862 employees on sickness absence (maximum duration of 12 weeks). The employees filled out a baseline questionnaire and were subsequently followed until the tenth month after listing sick. Cox proportional hazards regression analyses were used to identify determinants of RTW. Results. For the study population as a whole type of complaint, earlier sickness absence, subjective severity of complaints and several RAND-36 subscales were predictive of RTW. Furthermore, the RAND-36 subscales physical functioning, physical role limitations, mental health, and health change were predictive of RTW among employees with musculoskeletal complaints. For employees with other physical health problems subjective severity of complaints and the RAND-36 subscales physical and social functioning, general health perception, and health change were associated with RTW. Finally, with regard to the group with psychological complaints the RAND-36 subscales mental health and general health perception predicted RTW. Conclusion. Several aspects of self-rated health predict RTW for employees on long-term sickness absence. Variables related to functional status predict RTW for employees with physical complaints in contrast to psychological problems.

THE ASSESSMENT OF RELATIONSHIP BELIEFS IN A MARITAL CONTEXT

Abstract The current study presents data on reliability and validity of the Relationship Beliefs Inventory (RBI), a 40-item questionnaire which was designed to assess beliefs people hold about intimate relationships. The RBI was administered to clinical and non-clinical couples along with measures of marital functioning, communication, and irrational beliefs. The RBI-scales are relatively unaffected by social desirability and have adequate internal consistency and test-retest reliability. Evidence was provided for its construct validity, but discriminant validity is poor.