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Lifetime Data Analysis - Frailty models are generally used to model heterogeneity between the individuals. The distribution of the frailty variable is often assumed to be continuous. However, there...  相似文献   
2.
Physical activity offers one of the greatest opportunities for people to extend years of active independent life and reduce functional limitations. The article identifies key practices for promoting physical activity in older adults, with a focus on those with chronic disease or low fitness and those with low levels of physical activity. Key practices identified: (a) A multidimensional activity program that includes endurance, strength, balance, and flexibility training is optimal for health and functional benefits; (b) principles of behavior change including social support, self-efficacy, active choices, health contracts, assurances of safety, and positive reinforcement enhance adherence; (c) manage risk by beginning at low intensity but gradually increasing to moderate physical activity, which has a better risk:benefit ratio and should be the goal for older adults; (d) an emergency procedure plan is prudent for community-based programs; and (e) monitoring aerobic intensity is important for progression and motivation. Selected content review of physical activity programming from major organizations and institutions is provided.  相似文献   
3.
Physical activity offers one of the greatest opportunities for people to extend years of active independent life and reduce functional limitations. The purpose of this paper is to identify key practices for promoting physical activity in older adults, with a focus on older adults with chronic disease or low fitness and those with low levels of physical activity. Key practices identified in promotion activity in older adults include: (1) a multidimensional activity program that includes endurance, strength, balance, and flexibility training is optimal for health and functional benefits; (2) principles of behavior change, including social support, self-efficacy, active choices, health contracts, assurances of safety, and positive reinforcement, enhance adherence; (3) management of risk by beginning at low intensity but gradually increasing to moderate physical activity which has a better risk/benefit ratio should be the goal for older adults; (4) an emergency procedure plan is prudent for community-based programs; and (5) monitoring aerobic intensity is important for progression and for motivation. Selected content reviews of physical activity programming from major organizations and institutions are provided. Regular participation in physical activity is one of the most effective ways for older adults, including those with disabilities, to help prevent chronic disease, promote independence, and increase quality of life in old age.Publication Note All National Blueprint Publications are in the public domain and can be freely reproduced without copyright. This article has been previously published in Medicine Science and Sports and Exercise and the Journal of Aging and Physical Activity. Individuals or organizations who wish to publish National Blueprint articles should contact the National Blueprint Office for permission.  相似文献   
4.
This article uses the censuses of 1842 of Canada East (modern-day Quebec) and Canada West (modern-day Ontario) to help explain the historical differences in living standards between Canada and the United States. The wage and price data contained in the censuses suggest a gap of 42 percent between Canada East and Canada West. We argue that Canada East was substantially poorer than the rest of Canada and, as it represented such a large proportion of the total population of the initial four Canadian provinces (over 35 percent), that relative poverty weighed heavily in determining the extent of differences in living standards between Canada and the United States. These findings change the perspective on the roots of the differences between the two countries. We propose that any research agenda trying to explain those differences should focus heavily on Quebec.  相似文献   
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The authors describe an undergraduate psychology course that covers academic advising and career planning. Lectures included choosing a major, job opportunities with a bachelor's degree, applying to graduate school, and guest lectures from professionals in psychology‐related careers. Students completed a plan of study, a résumé, and a career exploration paper. Students evaluated the course and assignments as being moderately high in value and recommended that the course continue to be required for psychology majors. Nearly all students (93%) either changed their career plans or felt more confident about their plans after taking the course. Recommendations for implementing a similar course are provided.  相似文献   
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Background

Hypertensive disorders of pregnancy are among the leading causes of maternal morbidity and mortality. Studies suggest that the use of folic acid may lower the risk of hypertensive disorders in pregnant women.

Aim

The aim of this study was to assess the effects of timing and duration of folic acid-containing supplement use on the risk for gestational hypertension and preeclampsia.

Methods

Exposures and outcomes data were obtained through interviews and review of participant’s medical records from the MotherToBaby cohort studies across the United States and Canada. Demographics, medical history, lifestyle factors, substance use, and fetal sex were assessed as potential confounders. Unadjusted and adjusted risks for gestational hypertension and preeclampsia were examined using odds ratios and 95% confidence intervals.

Findings

3247 women were included in the study. Compared to non-supplement use, early and late supplement use were not significantly associated with the development of gestational hypertension or preeclampsia. The odds of developing gestational hypertension and preeclampsia were significantly reduced as the duration of folic acid-containing supplement use increased.

Conclusion

Findings from this study suggest that the use of folic acid-containing supplements may mitigate the risk for gestational hypertension and preeclampsia.  相似文献   
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