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wiki:guide:research:screen [2022/05/16 18:45] tiffany [Should You Exclude Follow-up (or Post-Hoc) Studies?] |
wiki:guide:research:screen [2022/05/17 01:58] tiffany |
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After running your search through one or more databases, the next step is to screen through the results to decide which studies you want to include. | After running your search through one or more databases, the next step is to screen through the results to decide which studies you want to include. | ||
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===== Selecting Exclusion Criteria ===== | ===== Selecting Exclusion Criteria ===== | ||
- | Exclusion criteria should be determined before screening begins. Common exclusion | + | Exclusion criteria should be determined before screening begins. Common exclusion |
- | Additional exclusion criteria often relate to PICO. Examples include | + | Additional exclusion criteria often relate to [[https:// |
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===== Should You Exclude Follow-up Studies? ===== | ===== Should You Exclude Follow-up Studies? ===== | ||
- | It is generally better to include the primary study over post-hoc and follow-up studies. However, there are times when the post-hoc study is more relevant than the primary study. As long as you are only collecting data on each patient once, the follow-up study may be included. | + | It is generally better to include the primary study over follow-up |
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===== Is Dual Screening Necessary? ===== | ===== Is Dual Screening Necessary? ===== | ||
- | Dual screening is a process where two reviewers independently screen the search results | + | Dual screening is a process where two reviewers independently screen the search results |
- | The choice of whether to dual-screen or not should be discussed by the team. One study showed that single-reviewer abstract screening missed 13% of relevant studies, while dual-reviewer screening missed 3%.< | + | One study showed that single-reviewer abstract screening missed 13% of relevant studies, while dual-reviewer screening missed |
- | The level of experience of the reviewer can help determine whether dual screening is necessary. A study by Waffenschmidt et al. found that the median proportion of missed studies that would have been included by two independent reviewers reaching consensus was 3% (range: 0 to 21%) for experienced reviewers and 13% for less experienced reviewers (range: 0 to 58%). A clearly defined research question is helpful in reducing the number of missed studies.< | + | [[https:// |
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