| 21. |
- Elgán, Carina, et al.
(författare)
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Bone mineral density in relation to body mass index among young women: A prospective cohort study.
- 2006
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Ingår i: International Journal of Nursing Studies. - : Elsevier BV. - 1873-491X .- 0020-7489. ; 43:6, s. 663-672
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To identify important predictors among lifestyle behaviours and physiological factors of bone mineral density (BMD) in relation to body mass index (BMI) among young women over a 2-year period. Design, sample and measurements: Data were collected in 1999 and 2001. Healthy young women (n=152) completed a questionnaire. BMD measurements were performed by DEXA in the calcaneus. The women were subdivided into three categories according to baseline BMI. Results: Baseline bodyweight explained 25% of the variability in BMD at follow-up in the BMI<19 category, and high physical activity seemed to hinder BMD development. In the BMI>24 category, a difference in time spent outdoors during winter between baseline and follow-up was the single most important factor for BMD levels. Overweight women with periods of amenorrhoea had lower BMD than overweight women without such periods. Conclusions: Predictors and lifestyle behaviours associated with BMD are likely to be based on women of normal weight. BMI should be considered when advising on physical activity, since high physical activity seems to impair BMD development among underweight young women, possibly due to energy imbalance. Among overweight women, sleep satisfaction is the greatest predictor associated with BMD change and may indicate better bone formation conditions. Energy balance and sleep quality may be prerequisites of bone health and should be considered in prevention.
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| 22. |
- Elgán, Carina, et al.
(författare)
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Young women´s lifestyle behaviours and their bone mineral density changes:a grounded theory analysis.
- 2005
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Ingår i: Scandinavian Journal of Caring Sciences. - : Wiley. - 1471-6712 .- 0283-9318. ; 19:1, s. 39-45
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Tidskriftsartikel (refereegranskat)abstract
- Background: Only limited information is available on healthy young women's perspective of their own lifestyle behaviours. By lifestyle behaviours, e.g. smoking and physical activity, individuals have the possibility to influence bone mineral density (BMD). The aim of this study was to generate a theoretical model of lifestyle behaviours among young women with different BMD changes. Methods: Data were collected by interviewing with 11 women, and the material was analysed by means of the grounded theory. Findings: Two core categories were generated: (i) the respondents' outlook on life and (ii) their life situation. The respondents' outlook on life was either `rigid' or `relaxed'. Respondents who had a rigid outlook on life adjusted with others and had a decreased BMD while those with a relaxed outlook on life were doing things for fun and had an increased BMD level. Life situation also consisted of two categories: `stagnation' and `development'. Respondents in a static life situation did not pursue any active actions while in a developing life situation, the respondents were actively striving towards a goal. Four dimensions which characterized the respondents' outlook on life in relation to their life situation emerged: subordinating and enduring with a decreased BMD level or compromising and discerning with an increased BMD level. Conclusion: It seems as if the outlook on life has a greater influence than the acted lifestyle behaviour for bone development. Further research is needed to generalize the findings of this study and to explore the importance of the outlook on life among women of all ages.
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| 23. |
- Flemme, Inger, et al.
(författare)
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Long-term quality of life and uncertainty in patients living with an implantable cardioverter defibrillator.
- 2005
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Ingår i: Heart & lung : the journal of critical care. - St. Louis, MO : Elsevier BV. - 0147-9563 .- 1527-3288. ; 34:6, s. 386-92
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: This study describes the quality of life (QOL) and uncertainty in patients who have an implantable cardioverter defibrillator (ICD) and predicts QOL at long-term follow-up. METHODS: Long-term follow-up was defined as 6.9 years +/- 1 year (range 4.11-8.7 years). QOL was measured with the Quality of Life Index, and uncertainty was measured with the Mishel Uncertainty in Illness Scale. RESULTS: The overall QOL and health/functioning were unchanged over time. QOL in the socioeconomic (P = .002) and psychologic/spiritual domains (P = .012) decreased in the first year. From baseline to long-term follow-up, the QOL in the family domain (P = .011) and uncertainty (P = .002) decreased. Uncertainty was a predictor of low QOL. CONCLUSION: QOL was reasonably good 6.9 years post-ICD implantation. Patients felt less uncertain once they had passed the first year of their illness.
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| 24. |
- Fridlund, Bengt
(författare)
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10 challenges in supervision of doctoral students
- 2005
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Ingår i: European Journal of Cardiovascular Nursing. - : Oxford University Press (OUP). - 1474-5151 .- 1873-1953. ; 4:2, s. 97-98
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Tidskriftsartikel (refereegranskat)
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| 25. |
- Gunnarsson, Birgitta, 1958-, et al.
(författare)
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The Tree Theme Method as an intervention in Psychosocial Occupational Therapy : Client acceptability and outcomes
- 2009
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Ingår i: Australian Occupational Therapy Journal. - : Wiley. - 0045-0766 .- 1440-1630. ; 56:3, s. 167-176
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Tidskriftsartikel (refereegranskat)abstract
- Background/aim: The Tree Theme Method (TTM) is an intervention in which the client paints trees representing certain periods in his/her life. The intervention comprises five sessions, using trees as a starting point to tell one's life story. This study, which is part of an implementation project, aimed to examine the therapeutic alliance and client satisfaction, in relation to perceptions of everyday occupations and health-related factors, with clients going through a TTM intervention. Methods: Nine occupational therapists recruited 35 clients, at general outpatient mental health care units, for the TTM intervention. Self-rating instruments, targeting therapeutic alliance (HAq-II), different aspects of daily occupations (Canadian Occupational Performance Measure, Satisfaction with Daily Occupations), health-related factors (Sense of Coherence measure, Mastery Scale, Symptom Checklist-90-R) and client satisfaction (Client Satisfaction Questionnaire), were administrated before and after the intervention. Results: A good initial therapeutic alliance, experienced by both therapists and clients, was correlated to increased changes regarding occupational performance and self-mastery. According to the therapists’ ratings, a good initial therapeutic alliance was correlated to increased sense of coherence and a decreased level of psychiatric symptoms. The results showed positive significant changes in occupational performance and health-related factors. High ratings of the therapeutic alliance by the therapists were also related to high client satisfaction. Conclusions: The TTM seemed to function well in psychosocial occupational therapy, but there is a need for further implementation studies to deepen our understanding of the treatment process, comprising both technique and formation of the therapeutic alliance.
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| 26. |
- Gunnarsson, Birgitta, 1958-, et al.
(författare)
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The Tree Theme Method in psychosocial occupational therapy – a case study
- 2006
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Ingår i: Scandinavian Journal of Occupational Therapy. - : Informa UK Limited. - 1103-8128 .- 1651-2014. ; 13:4, s. 229-240
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Tidskriftsartikel (refereegranskat)abstract
- This study aimed to describe the Tree Theme Method (TTM) as a method for intervention in psychosocial occupational therapy. The TTM is based on theories concerning creative activities and occupational storytelling and story making. In order to exemplify the method a case study of a treatment process with follow up was undertaken. The participant was a female client suffering from anxiety and depression. During an interview the client painted symbolic trees on five different occasions with specific variations of the tree theme: a tree symbolizing her present life, her childhood, adolescence, adulthood, and, finally, a tree representing her future. The trees were used as starting points for the client to tell her life story. The intention was that she would find new strategies for how to change her daily life. Three years later there was a follow up stage where the client painted new trees and told her story. Some life themes were identified. The TTM appears suitable for intervention in psychosocial occupational therapy. In future studies the TTM should be subjected to evaluation research based on several clients in order to develop a deeper understanding of the process and what kind of results changes in the TTM intervention may provide.
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| 27. |
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| 28. |
- Hacker, R Scott, et al.
(författare)
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A Test for Multivariate ARCH Effects
- 2005
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Ingår i: Applied Economics Letters. - : Informa UK Limited. - 1350-4851 .- 1466-4291. ; 12:7, s. 411-417
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Tidskriftsartikel (refereegranskat)abstract
- This paper extends Engle's LM test for ARCH affects to multivariate cases. The size and power properties of this multivariate test for ARCH effects in VAR models are investigated based on asymptotic and bootstrap distributions. Using the asymptotic distribution, deviations of actual size from nominal size do not appear to be very excessive. Nevertheless, there is a tendency for the actual size to overreject the null hypothesis when the nominal size is 1% and underreject the null when the nominal size is 5% or 10%. It is found that using a bootstrap distribution for the multivariate LM test is generally superior in achieving the appropriate size to using the asymptotic distribution when (1) the nominal size is 5%; (2) the sample size is small (40 observations) and/or the VAR system is stable. With a small sample, the power of the test using the bootstrap distribution also appears better at the 5% nominal size.
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| 29. |
- Hacker, R Scott, 1964-, et al.
(författare)
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Optimal lag-length choice in stable and unstable VAR models under situations of homoscedasticity and ARCH
- 2008
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Ingår i: Journal of Applied Statistics. - : Routledge. - 0266-4763 .- 1360-0532. ; 35:6, s. 601-615
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Tidskriftsartikel (refereegranskat)abstract
- The performance of different information criteria - namely Akaike, corrected Akaike (AICC), Schwarz-Bayesian (SBC), and Hannan-Quinn - is investigated so as to choose the optimal lag length in stable and unstable vector autoregressive (VAR) models both when autoregressive conditional heteroscedasticity (ARCH) is present and when it is not. The investigation covers both large and small sample sizes. The Monte Carlo simulation results show that SBC has relatively better performance in lag-choice accuracy in many situations. It is also generally the least sensitive to ARCH regardless of stability or instability of the VAR model, especially in large sample sizes. These appealing properties of SBC make it the optimal criterion for choosing lag length in many situations, especially in the case of financial data, which are usually characterized by occasional periods of high volatility. SBC also has the best forecasting abilities in the majority of situations in which we vary sample size, stability, variance structure (ARCH or not), and forecast horizon (one period or five). frequently, AICC also has good lag-choosing and forecasting properties. However, when ARCH is present, the five-period forecast performance of all criteria in all situations worsens.
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| 30. |
- Hacker, R Scott, et al.
(författare)
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Tests for Causality between Integrated Variables Using Asymptotic and Bootstrap Distributions : Theory and Application
- 2006
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Ingår i: Applied Economics. - : Informa UK Limited. - 0003-6846 .- 1466-4283. ; 38:13, s. 1489-1500
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Tidskriftsartikel (refereegranskat)abstract
- Causality tests in the Granger's sense are increasingly applied in empirical research. Since the unit root revolution in time-series analysis, several modifications of tests for causality have been introduced in the literature. One of the recent developments is the Toda-Yamamoto modified Wald (MWALD) test, which is attractive due to its simple application, its absence of pre-testing distortions, and its basis on a standard asymptotical distribution irrespective of the number of unit roots and the cointegrating properties of the data. This study investigates the size properties of the MWALD test and finds that in small sample sizes this test performs poorly on those properties when using its asymptotical distribution, the chi-square. It is suggested that use be made of a leveraged bootstrap distribution to lower the size distortions. Monte Carlo simulation results show that an MWALD test based on a bootstrap distribution has much smaller size distortions than corresponding cases when the asymptotic distribution is used. These results hold for different sample sizes, integration orders, and error term processes (homoscedastic or ARCH). This new method is applied to the testing of the efficient market hypothesis
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