A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach
Background & Objectives: One of the problems of diagnostic accuracy studies is verification bias. It occurs when standard test performed only for non-representative subsample of study subjects that diagnostic test done for them. In this study we extend a Bayesian method to correct this bias. Met...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | fas |
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Tehran University of Medical Sciences
2012-09-01
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| Series: | مجله اپیدمیولوژی ایران |
| Subjects: | |
| Online Access: | http://irje.tums.ac.ir/browse.php?a_code=A-10-25-5&slc_lang=en&sid=1 |
| _version_ | 1818975274313711616 |
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| author | M Cheharazi M Shamsipour M Norouzi F Jafari F Ramazan Ali |
| author_facet | M Cheharazi M Shamsipour M Norouzi F Jafari F Ramazan Ali |
| author_sort | M Cheharazi |
| collection | DOAJ |
| description | Background & Objectives: One of the problems of diagnostic accuracy studies is
verification bias. It occurs when standard test performed only for
non-representative subsample of study subjects that diagnostic test done for
them. In this study we extend a Bayesian method to correct this bias. Methods: Patients
that have had at least twice repeated failures in cycles IVF ICSI were included
in this model. Patients were screened by using an ultrasonography and those
with polyps recommended for hysteroscopy. A logistic regression with binomial
outcome fit to predict the missing values (false and true negative),
sensitivity and specificity. Bayesian methods was applied with informative
prior on polyp prevalence. False and true negatives were estimated in Bayesian
framework.Results: A
total of 238 patients were screened and 47 had polyps. Those with polyps are
strongly recommended to undergo hysteroscopy, 47/47 decided to have a
hysteroscopy and 37/47 were confirmed to have polyps. None of the 191 patients
with no polyps in ultrasonography had hysteroscopy. The false negative was
obtained 14 and true negative 177, so sensitivity and specificity was estimated
easily after estimating missing data. Sensitivity and specificity were equal to
74% and 94% respectively.Conclusion: Bayesian analyses with
informative prior seem to be powerful tools in simulation experimental |
| first_indexed | 2024-12-20T15:53:21Z |
| format | Article |
| id | doaj.art-44e8ece187444d5faf80838b6aeb7e6e |
| institution | Directory Open Access Journal |
| issn | 1735-7489 2228-7507 |
| language | fas |
| last_indexed | 2024-12-20T15:53:21Z |
| publishDate | 2012-09-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | مجله اپیدمیولوژی ایران |
| spelling | doaj.art-44e8ece187444d5faf80838b6aeb7e6e2022-12-21T19:34:34ZfasTehran University of Medical Sciencesمجله اپیدمیولوژی ایران1735-74892228-75072012-09-01822028A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian ApproachM Cheharazi0M Shamsipour1M Norouzi2F Jafari3F Ramazan Ali4 Background & Objectives: One of the problems of diagnostic accuracy studies is verification bias. It occurs when standard test performed only for non-representative subsample of study subjects that diagnostic test done for them. In this study we extend a Bayesian method to correct this bias. Methods: Patients that have had at least twice repeated failures in cycles IVF ICSI were included in this model. Patients were screened by using an ultrasonography and those with polyps recommended for hysteroscopy. A logistic regression with binomial outcome fit to predict the missing values (false and true negative), sensitivity and specificity. Bayesian methods was applied with informative prior on polyp prevalence. False and true negatives were estimated in Bayesian framework.Results: A total of 238 patients were screened and 47 had polyps. Those with polyps are strongly recommended to undergo hysteroscopy, 47/47 decided to have a hysteroscopy and 37/47 were confirmed to have polyps. None of the 191 patients with no polyps in ultrasonography had hysteroscopy. The false negative was obtained 14 and true negative 177, so sensitivity and specificity was estimated easily after estimating missing data. Sensitivity and specificity were equal to 74% and 94% respectively.Conclusion: Bayesian analyses with informative prior seem to be powerful tools in simulation experimentalhttp://irje.tums.ac.ir/browse.php?a_code=A-10-25-5&slc_lang=en&sid=1Verification biasMCMCBayesianHysteroscopyVaginal ultrasonography |
| spellingShingle | M Cheharazi M Shamsipour M Norouzi F Jafari F Ramazan Ali A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach مجله اپیدمیولوژی ایران Verification bias MCMC Bayesian Hysteroscopy Vaginal ultrasonography |
| title | A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach |
| title_full | A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach |
| title_fullStr | A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach |
| title_full_unstemmed | A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach |
| title_short | A New Method for Correcting Verification Bias in Diagnostic Accuracy Studies Using A Bayesian Approach |
| title_sort | new method for correcting verification bias in diagnostic accuracy studies using a bayesian approach |
| topic | Verification bias MCMC Bayesian Hysteroscopy Vaginal ultrasonography |
| url | http://irje.tums.ac.ir/browse.php?a_code=A-10-25-5&slc_lang=en&sid=1 |
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