Parametric estimation for partly interval-censored failure time data under Weibull distribution
This article discusses the parametric estimation in the existence of partly interval-censored failure time data. Partly interval-censored failure time data is composed of exact observations and interval-censored observations. This phenomenon often happens in clinical trials and health studies that a...
| Main Authors: | , |
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| Format: | Article |
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Scientific Publishing Center, University of Bahrain
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/34814/ |
| _version_ | 1848847879107510272 |
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| author | Mohammad Alharpy, Azzah Ibrahim, Noor Akma |
| author_facet | Mohammad Alharpy, Azzah Ibrahim, Noor Akma |
| author_sort | Mohammad Alharpy, Azzah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This article discusses the parametric estimation in the existence of partly interval-censored failure time data. Partly interval-censored failure time data is composed of exact observations and interval-censored observations. This phenomenon often happens in clinical trials and health studies that are followed by periodic follow-ups. We have constructed a parametric estimation for this kind of failure time data under Weibull distributions by using direct approach (without imputation) and indirect approach (with multiple imputation technique). Simulation studies are established to assess the proposed estimate for survival function and to illustrate the difference between the two approaches. The simulation results indicate that the presented procedure works well for both approaches but the estimate under the indirect approach is better than the estimate under direct approach. A modified secondary data set from breast cancer study is used to illustrate the proposed estimation. |
| first_indexed | 2025-11-15T09:25:37Z |
| format | Article |
| id | upm-34814 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T09:25:37Z |
| publishDate | 2014 |
| publisher | Scientific Publishing Center, University of Bahrain |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-348142015-12-23T03:05:01Z http://psasir.upm.edu.my/id/eprint/34814/ Parametric estimation for partly interval-censored failure time data under Weibull distribution Mohammad Alharpy, Azzah Ibrahim, Noor Akma This article discusses the parametric estimation in the existence of partly interval-censored failure time data. Partly interval-censored failure time data is composed of exact observations and interval-censored observations. This phenomenon often happens in clinical trials and health studies that are followed by periodic follow-ups. We have constructed a parametric estimation for this kind of failure time data under Weibull distributions by using direct approach (without imputation) and indirect approach (with multiple imputation technique). Simulation studies are established to assess the proposed estimate for survival function and to illustrate the difference between the two approaches. The simulation results indicate that the presented procedure works well for both approaches but the estimate under the indirect approach is better than the estimate under direct approach. A modified secondary data set from breast cancer study is used to illustrate the proposed estimation. Scientific Publishing Center, University of Bahrain 2014-06 Article PeerReviewed Mohammad Alharpy, Azzah and Ibrahim, Noor Akma (2014) Parametric estimation for partly interval-censored failure time data under Weibull distribution. Journal of Data Analysis and Operations Research, 1 (1). pp. 7-15. ISSN 2384-4671 http://journals.uob.edu.bh/JDAOR/contents/volume-14/articles/article-164 |
| spellingShingle | Mohammad Alharpy, Azzah Ibrahim, Noor Akma Parametric estimation for partly interval-censored failure time data under Weibull distribution |
| title | Parametric estimation for partly interval-censored failure time data under Weibull distribution |
| title_full | Parametric estimation for partly interval-censored failure time data under Weibull distribution |
| title_fullStr | Parametric estimation for partly interval-censored failure time data under Weibull distribution |
| title_full_unstemmed | Parametric estimation for partly interval-censored failure time data under Weibull distribution |
| title_short | Parametric estimation for partly interval-censored failure time data under Weibull distribution |
| title_sort | parametric estimation for partly interval-censored failure time data under weibull distribution |
| url | http://psasir.upm.edu.my/id/eprint/34814/ http://psasir.upm.edu.my/id/eprint/34814/ |