| 1. |
- Bjorner, JB, et al.
(författare)
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Use of item response theory to develop a shortened version of the EORTC QLQ-C30 emotional functioning scale
- 2004
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Ingår i: Quality of Life Research. - : Springer Science and Business Media LLC. - 1573-2649 .- 0962-9343. ; 13:10, s. 1683-1697
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Tidskriftsartikel (refereegranskat)abstract
- Background: As part of a larger study whose objective is to develop an abbreviated version of the EORTC QLQ-C30 suitable for research in palliative care, analyses were conducted to determine the feasibility of generating a shorter version of the 4-item emotional functioning (EF) scale that could be scored in the original metric. Methods: We used data from 24 European cancer studies conducted in 10 different languages (n = 8242). Item selection was based on analyses by item response theory (IRT). Based on the IRT results, a simple scoring algorithm was developed to predict the original 4-item EF sum scale score from a reduced number of items. Results: Both a 3-item and a 2-item version ( item 21 'Did you feel tense?' and item 24 'Did you feel depressed?') predicted the total score with excellent agreement and very little bias. In group comparisons, the 2-item scale led to the same conclusions as those based on the original 4-item scale with little or no loss of measurement efficiency. Conclusion: Although these results are promising, confirmatory studies are needed based on independent samples. If such additional studies yield comparable results, incorporation of the 2-item EF scale in an abbreviated version of the QLQ-C30 for use in palliative care research settings would be justified. The analyses reported here demonstrate the usefulness of the IRT-based methodology for shortening questionnaire scales.
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| 2. |
- Burström, Kristina, et al.
(författare)
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Swedish population health-related quality of life results using the EQ-5D
- 2001
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Ingår i: Quality of life research. - : Springer Nature B.V. - 1573-2649 .- 0962-9343. ; 10:7, s. 621-635
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Tidskriftsartikel (refereegranskat)abstract
- Health-related quality of life (HRQoL) measured on population level may be useful to guide policies for health. This study aims to describe the HRQoL; in EQ-5D dimensions, mean rating scale (RS) scores and mean EQ-5D index values, in the general population, by certain disease and socio-economic groups, in Stockholm County 1998. The EQ-5D self-classifier and a RS were included in the 1998 cross-sectional postal Stockholm County public health survey to a representative sample (n = 4950, 20-88 years), 63% response rate. Mean RS score ranged from 0.90 (20-29 years) to 0.69 (80-88 years), mean EQ-5D index value ranged from 0.89 (20-29 years) to 0.74 (80-88 years). For different diseases mean RS scores ranged from 0.80 (asthma) to 0.69 (angina pectoris), mean EQ-5D index values ranged from 0.79 (asthma) to 0.66 (low back pain). The mean health state scores (RS and EQ-5D index) were 0.06 lower in the unskilled manual group than in the higher non-manual group after controlling for age and sex (p < 0.0001). This difference was 0.03 after controlling also for different diseases (p < 0.0001). In conclusion, our results show that the HRQoL varies greatly between socio-economic and disease groups. Furthermore, after controlling for age, sex and disease, HRQoL is lower in manual than in non-manual groups.[PUBLICATION ABSTRACT]
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| 3. |
- Carlsson, Marianne, et al.
(författare)
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Evaluation of the life satisfaction questionnaire (LSQ) using structural equation modelling (SEM)
- 2002
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Ingår i: Quality of Life Research. - 0962-9343 .- 1573-2649. ; 11:5, s. 415-425
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Tidskriftsartikel (refereegranskat)abstract
- The life satisfaction questionnaire (LSQ) was developed for use in conventional and complementary/anthroposophic care to assess the quality of life/life satisfaction of Swedish women with breast cancer. The first attempt to test the reliability and validity was in a sample of women with breast cancer (n = 362), the second in a random sample of Swedish women (n = 257). A theoretical model with six latent and 34 manifest variables was formulated. The aim of the present study was to perform confirmatory factor analyses using structural equation modelling. The software STREAMS was used. An additional sample of men (n = 263) was randomly selected from the Swedish population register. Confirmatory factor analyses were performed for the combined sample of women and men (n = 520) and for the women with breast cancer. The result of the confirmatory factor analyses showed that the factor structure of the original model was confirmed. The factors were called physical symptoms (PS), sickness impact (SI), quality of everyday activities (QDA), socio-economic situation (SES), quality of family relation (QFA), and quality of close friend relationship (QFR).
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| 4. |
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| 5. |
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| 6. |
- Hansson, Lars, et al.
(författare)
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The relationship of personality dimensions as measured by the temperament and character inventory and quality of life in individuals with schizophrenia or schizoaffective disorder living in the community
- 2001
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Ingår i: Quality of Life Research. - 1573-2649. ; 10:2, s. 133-139
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Tidskriftsartikel (refereegranskat)abstract
- The influence of personality factors on the appraisal of subjective quality of life in individuals with schizophrenia or schizoaffective disorder is not much investigated. The present study examined this relationship in a sample of 104 patients living in the community. The temperament and character inventory was used to assess personality and the Lancashire quality of life profile was used to assess quality of life. The results showed that lower levels of harm avoidance and higher levels of self-directedness were significantly correlated to a better subjective quality of life. Regression analyses controlling for psychopathology revealed that a higher level of self-directedness was significantly associated with a better subjective quality in all aspects measured and explained the variance in the latter in the range of 4-12%. It is concluded that personality factors are involved in severely mentally ill individuals' assessment of their quality of life and should be accounted for in evaluations of quality of life assessments. The strength and directions of this influence require further studies.
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| 7. |
- Hedov, Gerth, et al.
(författare)
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Self-perceived health in Swedish parents of children with Down's syndrome
- 2000
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Ingår i: Quality of Life Research. - 0962-9343 .- 1573-2649. ; 9:4, s. 415-422
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Tidskriftsartikel (refereegranskat)abstract
- In this comparative study, self-perceived health was investigated in 165 parents of 86 children with Down's syndrome (DS), using the Swedish version of the SF-36 questionnaire. Questionnaires were mailed to parents of children with DS in a defined Swedish population. The results were compared with those in a randomised control group of parents from the Swedish SF-36 norm population. Mothers and fathers replied separately. Student's t-test with the Bonferroni correction was used for multiple statistical comparisons. The mothers of children with DS ('DS mothers') had significantly lower, less favourable scores than did the fathers of DS children ('DS fathers') in the Vitality (p < 0.0005) domain. Further, DS mothers spent significantly more time in caring for their child with DS than did the DS fathers (p < 0.0001). DS mothers also had lower scores than the mothers of the control group in the Vitality (p < 0.001) and Mental Health (p < 0.001) domains. DS fathers and control fathers differed significantly in the Mental Health domain (p < 0.002), but not otherwise. In conclusion, DS mothers showed poorer health than their spouses and the control mothers. No differences similar to those found between the DS mothers and DS fathers were observed between control mothers and control fathers.
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| 8. |
- Hedov, Gerth, et al.
(författare)
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Self-perceived health in Swedish parents of children with Down's syndrome
- 2000
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Ingår i: Quality of Life Research. - 0962-9343 .- 1573-2649. ; 9:4, s. 415-422
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Tidskriftsartikel (refereegranskat)abstract
- In this comparative study, self-perceived health was investigated in 165 parents of 86 children with Down's syndrome (DS), using the Swedish version of the SF-36 questionnaire. Questionnaires were mailed to parents of children with DS in a defined Swedish population. The results were compared with those in a randomised control group of parents from the Swedish SF-36 norm population. Mothers and fathers replied separately. Student's t-test with the Bonferroni correction was used for multiple statistical comparisons. The mothers of children with DS ('DS mothers') had significantly lower, less favourable scores than did the fathers of DS children ('DS fathers') in the Vitality (p < 0.0005) domain. Further, DS mothers spent significantly more time in caring for their child with DS than did the DS fathers (p < 0.0001). DS mothers also had lower scores than the mothers of the control group in the Vitality (p < 0.001) and Mental Health (p < 0.001) domains. DS fathers and control fathers differed significantly in the Mental Health domain (p < 0.002), but not otherwise. In conclusion, DS mothers showed poorer health than their spouses and the control mothers. No differences similar to those found between the DS mothers and DS fathers were observed between control mothers and control fathers.
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| 9. |
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| 10. |
- Herlitz, Johan, et al.
(författare)
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Relief symptoms and improvement of quality of Life five years after coronary artery bypass grafting in relation to preoperative ejection fraction
- 2000
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Ingår i: Quality of Life Research. - : Springer Netherlands. - 0962-9343 .- 1573-2649. ; 9:4, s. 467-476
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Tidskriftsartikel (refereegranskat)abstract
- AIM: To describe the relief of symptoms and improvement in Quality of Life (QoL) 5 years after coronary artery bypass grafting (CABG) in relation to preoperative ejection fraction (EF). METHODS: Patients who underwent CABG between 1988 and 1991 in western Sweden were approached with an inquiry prior to surgery and 5 years after the operation. Quality of Life was estimated with three different instruments: Physical activity score, Nottingham Health Profile and Psychological General Well-being Index. RESULTS: Among all patients who underwent CABG (n = 1904) the 5-year mortality rate was 27% in those with EF < 0.40 and 12% in those with EF > or = 0.40 (p < 0.0001). In all, 849 patients, of whom 58 (7%) had EF < 0.40 participated in the evaluation. Neither physical activity, symptoms of chest pain, dyspnea nor any indices of QoL were significantly associated with preoperative EF. Improvement in physical activity, symptoms of chest pain and dyspnea and various estimates of QoL appeared similar and marked regardless of preoperative EF. CONCLUSION: Among survivors there was no association between preoperative EF and symptoms or various estimates of QoL 5 years after CABG. Improvement in symptoms and QoL were not dependent on preoperative EF.
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