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Draws inferences from a sample to a population where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints.
Methods: Prospective population-based observationalstudy evaluating daily clinical practice in Northern Holland.
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We illustrate our new methodology using data from a longitudinal observationalstudy.
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Design: A prospective observationalstudy in a homogeneous population with nonspecific complaints.
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Design and setting: Prospective observationalstudy in university hospital intensive care units.
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Methods: Peruvians initiating first-line ART were enrolled in a prospective observationalstudy.
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Methods: A national CSD surveillancestudy is conducted in Israel since 1991.
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A long term surveillancestudy could hold the clues to developing a Covid-19 vaccine.
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A large surveillancestudy on antimicrobial prescribing appropriateness in different hospital settings is warranted.
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Design: We conducted a 15-year prospective surveillancestudy of all invasive pneumococcal infections in children.
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The authors evaluated the effectiveness and safety of bimatoprost using an open-label, non-comparative, three-month, community-based surveillancestudy.
Usage of observational studies in anglès
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Melioidosis risk was estimated using Bayesian evidence synthesis of 12 observationalstudies.
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Studies included randomized clinical trials, observationalstudies, guideline statements, and review articles.
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Design: Systematic review and meta-analysis of randomised controlled trials and observationalstudies.
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Most observationalstudies of CRP and cardiovascular disease have been in Europeans.
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The adipocyte-secreted protein adiponectin is associated with insulin sensitivity in observationalstudies.
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Weighting methods offer an approach to estimating causal treatment effects in observationalstudies.
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Context: Vitamin K has been implicated in bone health, primarily in observationalstudies.
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We also selected observationalstudies or case reports examining bisphosphonates related to ONJ.
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Results: Six cross-sectional or observationalstudies met the criteria for review.
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Cannon is quick to point out that observationalstudies have value.
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Where clinical trial evidence was lacking, we relied on information from observationalstudies.
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This completion rate was higher than reported in similar observationalstudies.
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We excluded original trial reports, observationalstudies, and clinical systematic reviews.
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Results providing evidence of associations may be overrepresented in meta-analyses of observationalstudies.
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The Cox model is a valuable tool, particularly for observationalstudies.
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We sought to include both experimental and observationalstudies within the United States.