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- Brower Scribani, Melissa, 1979-
(författare)
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Insights on weight maintenance and impacts of obesity for two rural populations in the United States and Sweden
- 2023
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background: Obesity is a serious public health concern worldwide, and nearly 40% of all adults in the United States and 21% in Sweden are now living with obesity. Efforts focusing mainly on weight loss have fallen short in reducing obesity prevalence. There is a great need for improved insight into what factors may promote a healthy weight, thereby avoiding the adverse health outcomes linked to obesity. Primary weight maintenance is a prevention strategy that emphasizes keeping a long-term stable weight in the non-obese range.Aim: The overall aims of this thesis were to improve understanding of the patterns of obesity and obesity-related mortality among rural adults in Central New York State (U.S.) and Västerbotten County (Sweden), and to explore factors that are related to primary weight maintenance.Material and methods: Data from U.S. health surveys and health examinations in Sweden were used to compare twenty-year (1989-2009) trends in body mass index (BMI) and obesity using multi-factor analysis of variance. The association between obesity and risk of 1) premature all-cause death, and 2) premature circulatory death, was compared between the U.S. and Sweden using proportional hazards regression. In 2009, a longitudinal questionnaire of attitudes, behaviors and perceptions regarding weight maintenance was administered to U.S. subjects. Associations between ten-year weight change and survey variables were tested using multiple linear regression, separately for sex and age strata. To gain a deeper understanding of influences, facilitators and barriers to healthy eating and physical activity, a qualitative interview study was conducted with U.S. women aged 26-35, with data analyzed by qualitative content analysis.Results: Over twenty years, BMI increased for both men and women in all age strata in both countries, and those with no university education consistently had higher BMI than their university-educated counterparts. BMI increased more for younger groups (ages 36-45) compared to those aged 46-55 and 56-62. U.S. females aged 36-45 showed the greatest increases in average BMI, particularly when comparing 1999 to 2009. Increases in the prevalence of obesity (BMI≥30) in Sweden were more modest than in the U.S. Severe obesity (BMI≥35) was associated with significantly increased risk of premature death from all causes and from circulatory causes for all subjects. Severe obesity was less common in Sweden (2% of men, 3% of women) than in the U.S. (8% of men, 9% of women). Nonetheless, severely obese Swedish men had 2.9 times the risk of premature death from all causes compared to those of normal weight, and 4.9 times the risk for circulatory causes. The gradient of risk among U.S. men was significantly lower than in Sweden; those with severe obesity had a 1.6 times increased risk for all-cause premature death and 3.2 times increased risk for premature circulatory death. The pattern of risk among women did not differ between countries. Longitudinal analysis of U.S. health survey participants showed that women aged 26-35 gained the most weight of any group (mean=10.3kg gained over ten years). The variables found to be associated with ten-year weight change were different across sex and age groups. Among women, all variables associated with weight change were exercise-related. Among men, three of the four predictors were focused on eating habits. Interviews with women aged 26-35 revealed the challenges of healthy eating and engaging in physical activity. Women often identified as caregivers for others, and those with more social support, who were financially stable and showed self-efficacy around healthy choices were able to more consistently engage in healthy habits.Conclusions: Obesity is an increasing problem for the rural adult population in both the U.S. and Sweden. When primary weight maintenance strategies are designed to support individuals towards healthy eating and increased physical activity, the complexity of the living environment must be considered. Individual conditions and personal relationships as well as the physical environment, home environment and work environment must be included in the assessment. Development of targeted programs for primary weight maintenance should be a focus of public health work for adults in rural areas in both Sweden and the U.S.
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| 2. |
- Andersen, Pia, 1958-
(författare)
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Physical activity on prescription with access to counsellor support implemented in routine care : Healthcare and patient perspectives
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background: The Swedish PAP (physical activity on prescription) programme FaR®, introduced in 2001, has been adopted by all Swedish regions, which are responsible for provision of healthcare in Sweden. Several studies have shown positive outcomes of the Swedish PAP on patients’ physical activity and other health-related outcomes. There are no guidelines for best practises of the Swedish PAP, which has led to the development of different organizational structures for its delivery. This thesis project was developed with the ambition of providing knowledge for further development of PAP in clinical practise.Aim: The overall aim was to investigate and generate improved understanding of a structure for physical activity on prescription with access to physical activity counsellors, implemented in routine healthcare.Methods: To address the overall aim, four real-world studies with different design and analysis methods were carried out. The study population consisted of patients 18 years or older prescribed PAP in primary and secondary care in Region Kronoberg’s healthcare organization. Study I investigated characteristics of healthcare delivery of PAP over a four-year period, including all patients prescribed PAP in these years. Study II explored factors that influenced patient’s long-term engagement in physical activity after prescription. Study III investigated differences in physical activity and health-related quality of life (HRQoL) at one-year follow-up between patients who used versus patients who did not use counsellor support after prescription. Study IV investigated factors associated with patients increase in physical activity at one-year follow-up. Data sources for the studies were electronic medical records (Studies I, II, III and IV), individual interviews (Study II) and a baseline and a follow-up questionnaire (Studies III and IV). Different statistical analyses were performed in Studies I, III and IV. Study II used qualitative content analysis based on an approach including both inductive and deductive analysis. The final study samples of PAP recipients were N = 4,879 (Study I), n = 13 (Study II), n = 400 (Study = III) and n = 355 (Study IV).Results: Study I: 4,879 PAP recipients were identified, one-third had used the offer of counsellor support. PAP recipients had a high frequency of diagnosis and healthcare consumption prior to PAP. Counsellor users had higher frequency of multiple diagnoses and healthcare visits than non-counsellor users. The main prescriber of PAP was physicians and the main prescribing setting was primary care. Study II: PAP recipients’ long-term engagement with physical activity was influenced by the determinants of capability, opportunity, and motivation. Receiving a prescription of physical activity, and professional counselling and follow up from a physical activity counsellor, and adaption of PAP to the individual’s capacity were important for patients change of physical activity. Study III: Counsellor users had better outcomes in both physical activity and HRQoL than non-users of this support. Study IV: Nearly half of the PAP recipients had increased physical activity one year after prescription. Increased physical activity was positively associated with lower baseline activity, counsellor use, and positive perception of given support after PAP.Conclusions: Patients who were prescribed PAP had a high frequency of diagnoses and high healthcare consumption in the year prior to the prescription. Due to the positive findings regarding patient outcomes on physical activity, and patient experiences of counsellor support, it could be suggested that individualized counselling and follow up by a physical activity counsellor is of importance for patients’ engagement in physical activity, especially for patients with lower baseline activity. Since increased activity was also seen among nonusers of counsellor support, a general recommendation for physical activity counsellor support for all PAP recipients could not be suggested.
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