From: B-type natriuretic peptides in chronic obstructive pulmonary disease: a systematic review
Selection | Is there consecutive or random participant sampling? |
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Misclassification | Are key inclusion/exclusion criteria clearly stated and defined by valid and reliable measures? |
Performance | Did the study vary from the protocol proposed by the investigators, and was there appropriate ethical approval? |
Detection | Is the study design prospective, retrospective, or mixed? |
Reporting | Are important primary outcomes missing from the results? |
Information | Were valid and reliable measures used consistently across all study participants to assess outcomes, exposures or interventions? |
Confounding Interpretation | Were important confounding and effect modifying variables accounted for in the design and/or analysis? |