| 1. |
- Bixo, Marie, 1957-
(author)
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Ovarian steroids in rat and human brain : effects of different endocrine states
- 1987
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Doctoral thesis (other academic/artistic)abstract
- Ovarian steroid hormones are known to produce several different effects in the brain. In addition to their role in gonadotropin release, ovulation and sexual behaviour they also seem to affect mood and emotions, as shown in women with the premenstrual tension syndrome. Some steroids have the ability to affect brain excitability. Estradiol decreases the electroshock threshold while progesterone acts as an anti-convulsant and anaesthetic in both animals and humans. Several earlier studies have shown a specific uptake of several steroids in the animal brain but only a few recent studies have established the presence of steroids in the human brain.In the present studies, the dissections of rat and human brains were carried out macroscopically and areas that are considered to be related to steroid effects were chosen. Steroid concentrations were measured by radioimmunoassay after extraction and separation with celite chromatography. The accuracy and specificity of these methods were estimated.In the animal studies, immature female rats were treated with Pregnant Mare's Serum Gonadotropin (PMSG) to induce simultaneous ovulations. Concentrations of estradiol and progesterone were measured in seven brain areas pre- and postovulatory. The highest concentration of estradiol, pre- and postovulatory, was found in the hypothalamus and differences between the two cycle phases were detected in most brain areas. The preovulatory concentrations of progesterone were low and the highest postovulatory concentration was found in the cerebral cortex.In one study, the rats were injected with pharmacological doses of progesterone to induce "anaesthesia". High uptake of progesterone was found and a regional variation in the formation of 5<*-pregnane-3,20-dione in the brain with the highest ratio in the medulla oblongata.Concentrations of progesterone, 5a-pregnane-3*20-dione, estradiol and testosterone were determined in 17 brain areas of fertile compared to postmenopausal women. All steroids displayed regional differences in brain concentrations. Higher concentrations of estradiol and progesterone were found in the fertile compared to the postmenopausal women.In summary, these studies show that the concentrations of ovarian steroids in the brain are different at different endocrine states in both rats and humans and that there are regional differences in brain steroid distribution.
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| 2. |
- Grundberg, Åke
(author)
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Mental health promotion among community-dwelling seniors with multimorbidity : perspectives of seniors, district nurses and home care assistants
- 2015
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Doctoral thesis (other academic/artistic)abstract
- The prevalence of mental illness is increasing among the older population in Sweden. One of the most vulnerable groups for mental health problems is older persons with multimorbidity, i.e. seniors with multiple chronic conditions. Many of them remain in their own homes with a comprehensive and complex need of support and healthcare, mainly provided by home care assistants (HCAs) and district nurses (DNs). However, the detection of mental health problems for adequate treatment or to promote mental health among community-dwelling seniors with multimorbidity, calls for skills and competences in this area.This thesis aimed to gain a deeper understanding of how mental health may be promoted among community-dwelling seniors with multiple chronic conditions. Four studies have been included in this thesis (I-IV). All studies had a qualitative descriptive design with either a phenomenographic approach or latent and manifest qualitative content analysis technique. The aim of study I was to describe the variations in how community-dwelling seniors with multimorbidity perceived the concept of mental health and what may influence it. The findings showed the participants conceptualised mental health as having both positive and negative facets. The participants further conceived that social contact, physical activity and optimism may improve mental health, while social isolation, ageing, and chronic pain may worsen it. Study II aimed to describe the experience of health-promoting dialogues from the perspective of community-dwelling seniors with multimorbidity, and what these seniors believed to be important for achieving a dialogue that may promote their mental health. The main finding was the necessity of being seen as a unique individual by an accessible and competent person. Further, the participants missed having friends and relatives to talk to and they especially lacked healthcare or social service providers for health-promoting dialogues that may promote mental health. The aim of study III was to describe DNs’ perspectives on detecting mental health problems and promoting mental health among community-dwelling seniors with multimorbidity. Findings revealed that the DNs’ focus was on assessment, collaboration and social support as a way of detecting mental health problems and promoting mental health. Study IV described HCAs’ perspectives on detecting mental health problems and promoting mental health among the seniors in focus. The findings revealed that continuity of care and the seniors’ own thoughts and perceptions were regarded as essential for the detection of mental health problems. Further, observation, collaboration, and social support emerged as important means of detecting mental health problems and promoting mental health.Conclusions: The results of this thesis are based on interviews and show that: 1) Seniors with multimorbidity should have an opportunity to describe how multiple chronic conditions may affect their life situation; 2) An optimal level of care can be achieved through continuity, involvement, and by providing a health-promoting dialogue based on the person’s wishes and needs; 3) Even if DNs seemed engaged in primary mental healthcare, there were no expressed goals set in the improvement of mental health, and it seemed that these DNs could not bear the primary responsibility for early detection of mental health problems and early interventions to improve mental health; 4) HCAs had knowledge about risk factors for mental health problems and it appears that they were dependent on care managers’ decision-making in granted support, as well as supervision from DNs in the detection of mental health problems and to promote mental health.In summary, the finding in the present thesis demonstrates that managing mental health problems is still an ongoing challenge for those organisations providing continuity in home care and home healthcare for homebound elderly persons with complex chronic conditions. The finding in the thesis also shows that DNs and HCAs seem to be dependent on each other in this area. Mental health promotion was expressed as an important assignment among DNs and HCAs, even though they describe different prerequisites and factors which could be seen as barriers in the detection of common mental health problems such as depression, anxiety and sleep problems. These personnel further described difficulties in collaboration and transmission of information between care- and healthcare providers from the community and primary care context. Social and physical interventions - as well as social contacts and social support to break social isolation - seemed important according to all the informants, with their different perspectives of how mental health may be promoted.
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| 3. |
- Gustafson, Yngve, 1949-
(author)
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Acute confusional state (delirium) : clinical studies in hip-fracture and stroke patients
- 1991
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Doctoral thesis (other academic/artistic)abstract
- Acute confusional state (ACS) or delirium according to DSM-III-R holds a central position in the medicine of old age. ACS is a common and sometimes the only symptom of diseases and medical complications in the elderly patient.The aim of this study was to elucidate ACS in patients with femoral neck fractures and patients with acute stroke with regard to frequency, predictors, possible pathogenetic mechanisms, associated complications, assessment and documentary routines and the clinical outcome for the patients. An intervention program to prevent postoperative ACS based on our results was developed and evaluated.The main findings of the study were high frequencies of ACS in elderly patients with femoral neck fractures (61 %) and in patients with acute stroke (48 %). The main risk factors for ACS in patients with femoral neck fractures were old age, diseases and drug treatment interfering with cerebral cholinergic metabolism. There was no link between anaesthetic technique and ACS but the connection between peroperative hypotension, early postoperative hypoxia and ACS was close.In stroke patients the degree of extremity paresis and old age were independent ACS risk factors. ACS was commonly associated with post stroke complications such as myocardial infarction, pneumonia, urinary infection and urinary retention. In stroke patients there was a close connection between high hypothalamic-pituitary-adrenal axis (HPA-axis) activity and ACS. High HPA-axis activity and disturbances in the cerebral cholinergic system may be two important ACS mechanisms.A correct diagnosis is a prerequisite for proper treatment of ACS and its underlying causes. In the orthopaedic wards both physicians and nurses diagnosed and documented ACS poorly and therefore associated complications were insufficiently treated.The intervention program for postoperative ACS, aimed mainly at protecting the cerebral oxidative metabolism and thereby the cerebral cholinergic metabolism which is especially sensitive to hypoxia. Postoperative complications associated with ACS were also treated. The intervention resulted in reduced frequency, duration and severity of postoperative ACS and in shorter orthopedic ward stay for patients with femoral neck fractures.Key words: Acute confusional state, delirium, elderly
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| 4. |
- Håkansson, Krister, 1952-
(author)
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The role of socio-emotional factors for cognitive health in later life
- 2016
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Doctoral thesis (other academic/artistic)abstract
- With increasing life expectancies in most parts of the world, the prevalence of dementia and other age-related chronic diseases is growing. Several factors affect future projections and are discussed in this thesis, including possible limits to a continued growth of life expectancy. A related question is to what extent healthy ageing per se affects cognitive functions in old persons. Previous studies have generally exaggerated ageing effects on cognition, by applying study designs that did not account for common confounders, such as birth cohort differences, and the effects of terminal decline and subclinical dementia. In contrast to healthy ageing, dementia neuropathologies dramatically reduce cognitive performance, and proposed mechanisms behind dementia are briefly discussed with focus on Alzheimer’s disease (AD), on the role of genetic factors and on life course exposures. Three studies (study 1-3) investigated how cohabitant status and feelings of loneliness and hopelessness in midlife were associated with cognitive health in later life. Neurotrophic factors could potentially be involved in the biological mechanisms behind these and other associations between life-style factors and cognitive health. The fourth study aimed to explore how levels of brain-derived neurotrophic factor (BDNF), measured in serum, were affected by performing different activities; physical exercise, cognitive training, and mindfulness.THE FOUR STUDIESStudy 1-3 were epidemiological association studies based on the Cardiovascular Risk Factor, Ageing and Dementia (CAIDE) Study, a population based cohort study on 1511 persons in eastern Finland, who at baseline were 50.4 years. Two re-examinations have been performed in the CAIDE Study, in 1998 when the participants were between 65 and 80 years, and between 2005-2008, averagely 25.3 years after the baseline examinations. The first two studies were based on the 1409 persons who fully participated in the first re-examination and the third study on the 1511 persons who participated in one or both re-examinations. In the first two studies logistic regression was the main statistical method with any cognitive impairment versus no cognitive impairment as outcome. In addition we performed analyses with mild cognitive impairment and Alzheimer’s disease as separate outcomes. In Study 1 and 2 we also analysed how apolipoprotein epsilon 4 (ApoE4) status affected the associations with Alzheimer’s disease. The statistical method in Study 3 was survival model analysis (Kaplan-Meyer and Cox regression) and the outcome variable was dementia, without subtyping. We compared the results from the analysis on the 1511 participants with the results when we used the total sample (by including register linked data on dementia diagnoses). We adjusted the associations for several potential confounding variables in all three studies.In Study 4 we used 19 elderly healthy volunteers who were between 65 and 80 years (mean = 70.8 years). They performed three different activities during 35 minutes on separate occasions, i.e. a within-subject cross-over experimental design where we randomized the order of the three conditions between the participants. We sampled blood from a suitablelower arm vein directly before and after each activity session and in addition at 20 and 60 minutes after the session had ended. After the serum had been analysed for BDNF levels, we used repeated measures ANOVA to calculate the differences in the effect of BDNF levels between the three conditions.MAIN RESULTSWe found that living alone in midlife was associated with approximately a doubled risk of cognitive impairment during the re-examination. Among the non-cohabitants the risk increase was especially high for persons who were widowed in midlife and who had continued to live alone until the re-examination (odds ratio (OR) 7.67, 95% confidence interval (CI) 1.6 – 40.0). Feelings of loneliness were common both among cohabitants and non-cohabitants, but we found that such feelings were only associated with an increased dementia risk if these persons had also been living alone. Feelings of hopelessness in midlife, but not at follow-up, were associated with increased risk of cognitive impairment at the re-examination, especially of Alzheimer’s disease (OR 2.90, CI 1.4 – 5.9). When we adjusted the association from midlife also for depression and hopelessness at the re-examination, this association was still statistically significant. Participants with a diagnosis of cognitive impairment had higher feelings of hopelessness at the re-examination, compared to the cognitively healthy group, but this difference between the groups existed already when they were in midlife. When we stratified the participants with reference to ApoE4 status, we found that participants who were also ApoE4 carriers had a dramatically increased risk of Alzheimer’s disease compared to non-carriers without feelings of hopelessness, even after final adjustment for depression (OR 6.48, CI 2.4 –17.5). A similar stratification for ApoE4 status in Study 1 showed an even more dramatic increase in the association for persons who had lost their partner (widowed or divorced/separated) if they in addition were ApoE4 carriers.In Study 4 we found that physical exercise, but not cognitive training or mindfulness, led to a statistically significant increase in BDNF levels of around 25%, compared to baseline. We also found that the individual differences in BDNF levels after the physical exercise correlated with working memory performance, measured on a separate occasion.CONCLUSIONSSocial and emotional factors can have long-term consequences for cognitive health in later life. The long follow-up time in Study 1-3 suggests that the associations we found with dementia could reflect a causal, rather than a prodromal, relation. As other studies have found a range of adverse ill health consequences from both living alone and from depressive feelings, a possible mechanism behind the associations we found could be related to a systemic biological impact, and that the specific ill health outcome could be a result of individual vulnerability where genetic dispositions could play an important role. This conclusion seems consistent with the dramatic risk increases we found for AD when ApoE4status was combined with the social factor of living alone and with the emotional dimension of hopelessness. At the micro level, as synaptic dysfunction and loss is characteristic of Alzheimer’s disease, and as BDNF has a central role for synaptogenesis, impaired BDNF functionality could play a role in the development of Alzheimer’s disease. More research is needed to further explore the role of BDNF in Alzheimer’s disease and if the disease can be prevented, or the disease process halted, by activities that stimulate BDNF expression in the brain.
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| 5. |
- Viitanen, Matti, 1950-
(author)
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Long-term effects of stroke
- 1987
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Doctoral thesis (other academic/artistic)abstract
- Stroke, which has an increasing incidence with age, causes an irreversible brain damage which may lead to impairment, disability and decreased life satisfaction or death.Risk factors for death, recurrent stroke and myocardial infarction, were analyzed in 409 stroke patients treated at the Stroke Unit, Department of Medicine, Umeå University Hospital, between Jan. 1, 1978 and Dec. 31, 1982. The causes of death were related with the time of survival. In fully co-operable (n=62) 4-6 year stroke survivors, the occurrence of motor and perceptual impairments, of self-care (ADL) disability and of self-reported decreased life satisfaction due to stroke was determined.The probability of survival was 77% three months after stroke, 69% after one year, and 37% after five years. Multivariate statistical analysis indicated that impairment of consciousness was the most important risk factor for death followed by age, previous cardiac failure, diabetes mellitus, intracerebral hemorrhage and male sex. During the first week, cerebrovascular disease (90%) was the most dominant primary cause of death, from the second to the fourth week pulmonary embolism (30%), bronchopneumonia during the second and third months and cardiac disease (37%) later than three months after stroke. The risk of recurrence was 14% during the first year after stroke and the accumulated risk of stroke recurrence after 5 years was 37% after stroke. The estimated probability of myocardial infarction was 7% at one year and 19% at 5 years. High age and a history of cardiac failure increased the risk of recurrent stroke. The risk of myocardial infarction was associated with high age, angina pectoris and diabetes mellitus. The highest risk of epilepsy was found between 6 and 12 months after stroke. Motor impairment prevailed in 36% of the long-term survivors, perceptual impairments in up to 57% and decreased ADL-capacity in 32%. As regards ecological perception, perceptual function variables were distinctly grouped into low and high level perception which together with motor function explained 71% of the variance of self-care ADL. While levels of global and of domain specific variables of life satisfaction appeared stable in clinically healthy reference populations aged 60 and 80 years, the stroke had produced a decrease in one or more aspects of life satisfaction for 61% of the long-term survivors. Although significantly associated with motor impairments and ADL disability, these changes could not only be attributed to physical problems.
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| 6. |
- Westerbotn, Margareta
(author)
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Drug Use Among the Very Old Living in Ordinary Households : Aspects on Well-being, Cognitive and Functional Ability
- 2007
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Doctoral thesis (other academic/artistic)abstract
- Background: In Sweden today a major proportion of the population survive to old ages. To a large extent, the oldest old are capable of living longer in their own households; some of them are very healthy while others have multiple diagnoses or ailments caused by a normal ageing process. This means that many elderly persons receive their health care needs in their own home, and in the future this will be even more common. Drug use of the elderly is a complex field, and many drugs have side effects complicating the medical treatment and decreasing the quality of life. Aim: This thesis aims to explore and describe the medicine use and the medical situation of very old persons (¡Ý84 years) living in ordinary households, and to obtain knowledge of their views on the use of drugs.Methods: This thesis combines quantitative and qualitative research methods. The quantitative studies (Study I, II and III) were based on data from the Kungsholmen Project, a population based study of elderly people living in a district of the inner city of Stockholm, Sweden. Data collection of the present studies was carried out from the third follow-up 1997-1998. The qualitative data (Study IV) was obtained 2005 through in-depth interviews with 25 elderly men and women, aged 85-97 years, living in ordinary households in Stockholm, Sweden. A pre-tested semi-structured questionnaire was used for the interviews.Results: The findings in Study I demonstrated that cardiovascular diseases are very frequent in this population (62%). Heart failure (47%) and hypertension (37%) were the most common conditions; and diuretics (69%), nitrates (31%) and cardiac glycosides (30%) were the most commonly prescribed drugs. Multivariate regression analyses showed that while being affected by a CV disease did not affect the emotional well-being of the participants (PANAS-PA, p=0.171; PANAS-NA, p=0.209), the use of cardiac glycosides (p=0.006) and nitrates (p=0.008) was associated with increased negative feelings. Study II revealed that 88% of the population took medicines on a regular basis, and only 23% of them received help with the handling of their medicines. Using logistic regression models controlling for sociodemographic variables, cognitive and functional status, female gender (OR: 2.8; 95% CI: 1.2-6.5) was the only variable associated with regular use of medicines. The results also showed that older age and functional disability as measured by ADL, increased the risk of receiving help with medicines, while higher cognitive status decreased the odds of receiving help. Using multiple regression models, we found that the only factor related to not receiving help from a family member was that of living alone (OR:0.05; 95% CI: 0.006-0.4). Study III showed that the prevalence of pain among very old persons was 46%, and the prevalence of pain treatment was 71%. Results from logistic regression analysis using all variables in the model indicated that pain reporting was not associated with age, gender or living conditions, but decreased with decreasing cognitive status and with increasing functional disability. Furthermore, pain treatment was not associated with age, gender, living conditions, cognitive and functional status. The qualitative data in Study IV indicated that most of the participants managed their medicines by themselves and were very content with this. Those elderly who received help with their medicines were also very pleased with this help. The findings also revealed that the most important components for the elderly to be able to remain living in their homes and to handle their medicines by themselves, were to have good cognitive ability, to be independent and to get support with their medicines from a close person as a back-up.Conclusions: This study revealed that a large proportion of very old people (¡Ý84 years) were living in ordinary households and used medicines regularly. Being a woman and living alone were associated with receiving help with medicines from the community help services. Cognitive and functional ability were revealed to be significant factors in the management of medicines, but also to affect the pain reporting, and type of received pain treatment. Most of the older participants managed to handle their medicines by themselves, and were very pleased by doing this. However, most of them were concerned about the risk of losing their memory, as they are getting older, because they knew that they would not be able to manage themselves any more and therefore would have to move to an institution.
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| 7. |
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