Catalogue of bias: Attrition bias
This article is part of a series of articles featuring the Catalogue of Bias introduced in this volume of BMJ Evidence-Based Medicine that describes attrition bias and outlines its potential impact on research studies and the preventive steps to minimise its risk. Attrition bias is a type of selecti...
| Hoofdauteurs: | , , |
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| Formaat: | Journal article |
| Taal: | English |
| Gepubliceerd in: |
BMJ Publishing Group
2018
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| _version_ | 1826267136771751936 |
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| author | Nunan, D Aronson, J Bankhead, C |
| author_facet | Nunan, D Aronson, J Bankhead, C |
| author_sort | Nunan, D |
| collection | OXFORD |
| description | This article is part of a series of articles featuring the Catalogue of Bias introduced in this volume of BMJ Evidence-Based Medicine that describes attrition bias and outlines its potential impact on research studies and the preventive steps to minimise its risk. Attrition bias is a type of selection bias due to systematic differences between study groups in the number and the way participants are lost from a study. Differences between people who leave a study and those who continue, particularly between study groups, can be the reason for any observed effect and not the intervention itself. Associations for mortality in trials of tranexamic acid and upper gastrointestinal bleeding were no longer apparent after studies with high or unclear risk of attrition bias were removed. Over-recruitment can help prevent important attrition bias. Sampling weights and tailored replenishment samples can help to compensate for the effects of attrition bias when present. |
| first_indexed | 2024-03-06T20:49:35Z |
| format | Journal article |
| id | oxford-uuid:371ef2f4-db96-44e4-93de-3457524e73ca |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:49:35Z |
| publishDate | 2018 |
| publisher | BMJ Publishing Group |
| record_format | dspace |
| spelling | oxford-uuid:371ef2f4-db96-44e4-93de-3457524e73ca2022-03-26T13:42:08ZCatalogue of bias: Attrition biasJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:371ef2f4-db96-44e4-93de-3457524e73caEnglishSymplectic Elements at OxfordBMJ Publishing Group2018Nunan, DAronson, JBankhead, CThis article is part of a series of articles featuring the Catalogue of Bias introduced in this volume of BMJ Evidence-Based Medicine that describes attrition bias and outlines its potential impact on research studies and the preventive steps to minimise its risk. Attrition bias is a type of selection bias due to systematic differences between study groups in the number and the way participants are lost from a study. Differences between people who leave a study and those who continue, particularly between study groups, can be the reason for any observed effect and not the intervention itself. Associations for mortality in trials of tranexamic acid and upper gastrointestinal bleeding were no longer apparent after studies with high or unclear risk of attrition bias were removed. Over-recruitment can help prevent important attrition bias. Sampling weights and tailored replenishment samples can help to compensate for the effects of attrition bias when present. |
| spellingShingle | Nunan, D Aronson, J Bankhead, C Catalogue of bias: Attrition bias |
| title | Catalogue of bias: Attrition bias |
| title_full | Catalogue of bias: Attrition bias |
| title_fullStr | Catalogue of bias: Attrition bias |
| title_full_unstemmed | Catalogue of bias: Attrition bias |
| title_short | Catalogue of bias: Attrition bias |
| title_sort | catalogue of bias attrition bias |
| work_keys_str_mv | AT nunand catalogueofbiasattritionbias AT aronsonj catalogueofbiasattritionbias AT bankheadc catalogueofbiasattritionbias |