Cochrane Db Syst Rev
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Cochrane Db Syst Rev · Apr 2007
Review Meta AnalysisBed rest for acute uncomplicated myocardial infarction.
Bed rest is prescribed to all patients with acute myocardial infarction (AMI), but to a variable extent. Current guidelines (American College of Cardiology/ American Heart Association) recommend at least 12 hours bed rest in patients with uncomplicated ST-elevation myocardial infarction, however the basis for this recommendation is unclear. ⋯ Bed rest ranging from 2 to 12 days appears to be as safe as longer periods of bed rest. The quality of most trials is unsatisfactory. Current bed rest recommendations are not supported by the existing evidence as the optimal duration of bed rest is unknown. The lack of adequate trials is surprising, considering the large size of several studies to compare effectiveness of drugs on people with AMI.
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Cochrane Db Syst Rev · Apr 2007
Review Meta AnalysisOxygen therapy during exercise training in chronic obstructive pulmonary disease.
Exercise training within the context of pulmonary rehabilitation improves outcomes of exercise capacity, dyspnea and health-related quality of life in individuals with chronic obstructive pulmonary disease (COPD). Supplemental oxygen in comparison to placebo increases exercise capacity in patients performing single-assessment exercise tests. The addition of supplemental oxygen during exercise training may enable individuals with COPD to tolerate higher levels of activity with less exertional symptoms, ultimately improving quality of life. ⋯ This review provides little support for oxygen supplementation during exercise training for individuals with COPD, but the evidence is very limited. Studies with larger number of participants and strong design are required to permit strong conclusions, especially for functional outcomes such as symptom alleviation, health-related quality of life and ambulation.
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Cochrane Db Syst Rev · Apr 2007
Review Meta AnalysisGinkgo biloba for cognitive impairment and dementia.
Extracts of the leaves of the maidenhair tree, Ginkgo biloba, have long been used in China as a traditional medicine for various disorders of health. A standardized extract is widely prescribed for the treatment of a range of conditions including memory and concentration problems, confusion, depression, anxiety, dizziness, tinnitus and headache. The mechanisms of action are thought to reflect the action of several components of the extract and include increasing blood supply by dilating blood vessels, reducing blood viscosity, modification of neurotransmitter systems, and reducing the density of oxygen free radicals. ⋯ Ginkgo biloba appears to be safe in use with no excess side effects compared with placebo. Many of the early trials used unsatisfactory methods, were small, and we cannot exclude publication bias. The evidence that Ginkgo has predictable and clinically significant benefit for people with dementia or cognitive impairment is inconsistent and unconvincing.
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Cochrane Db Syst Rev · Apr 2007
Review Meta AnalysisMultidisciplinary rehabilitation for adults with multiple sclerosis.
Multidisciplinary rehabilitation (MD) is an important component of symptomatic and supportive treatment for Multiple sclerosis (MS), but evidence base for its effectiveness is yet to be established. ⋯ MD rehabilitation programmes do not change the level of impairment, but can improve the experience of people with MS in terms of activity and participation. Regular evaluation and assessment of these persons for rehabilitation is recommended. Further research into appropriate outcome measures, optimal intensity, frequency, cost and effectiveness of rehabilitation therapy over a longer time period is needed. Future research in rehabilitation should focus on improving methodological and scientific rigour of clinical trials.
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Cochrane Db Syst Rev · Apr 2007
ReviewHandsearching versus electronic searching to identify reports of randomized trials.
Systematic reviewers need to decide how best to reduce bias in identifying studies for their review. Even when journals are indexed in electronic databases, it can still be difficult to identify all relevant studies reported in these journals. Over 1700 journals have been or are being handsearched within The Cochrane Collaboration to identify reports of controlled trials in order to help address these problems. ⋯ Handsearching still has a valuable role to play in identifying reports of randomized trials for inclusion in systematic reviews of health care interventions, particularly in identifying trials reported as abstracts, letters and those published in languages other than English, together with all reports published in journals not indexed in electronic databases. However, where time and resources are limited, searching an electronic database using a complex search (or the Cochrane HSSS) will identify the majority of trials published as full reports in English language journals, provided, of course, that the relevant journals have been indexed in the database.