Distribution free test for unequal observation of panel count data with application in medical follow-up study
Objectives: In medical follow-up study, patients are treated with different treatments may have different follow-up schedule and the number of patients assigned in each treatment group may not be balanced. To address this, a nonparametric test procedure is proposed. Methods/Statistical Analysis: The...
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| Format: | Article |
| Language: | English |
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Indian Society for Education and Environment
2017
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| Online Access: | http://psasir.upm.edu.my/id/eprint/61501/ http://psasir.upm.edu.my/id/eprint/61501/1/Distribution%20free%20test%20for%20unequal%20observation%20of%20panel%20count%20data%20with%20application%20in%20medical%20follow-up%20study.pdf |
| _version_ | 1848854424527568896 |
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| author | Tan, Pei Ling Ibrahim, Noor Akma Arasan, Jayanthi Adam, Mohd Bakri |
| author_facet | Tan, Pei Ling Ibrahim, Noor Akma Arasan, Jayanthi Adam, Mohd Bakri |
| author_sort | Tan, Pei Ling |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Objectives: In medical follow-up study, patients are treated with different treatments may have different follow-up schedule and the number of patients assigned in each treatment group may not be balanced. To address this, a nonparametric test procedure is proposed. Methods/Statistical Analysis: The proposed test statistics is constructed based on the integrated weighted differences between the mean cumulative function of the recurrences event with condition on treatment group. For performance evaluation, the empirical power of proposed test statistics are evaluated via Monte Carlo simulation study conducted using R statistical software. Findings: Based on simulation results, the proposed method gives a good power for both identical and unequal follow-up processes, even when the sample sizes are imbalanced. Applications/Improvement: The proposed test procedure is also applied to a set of panel count data arises from the National Cooperative Gallstone Study to compare the treatment efficiency. The proposed test procedure able to detect treatment differences and is in line with earlier research. |
| first_indexed | 2025-11-15T11:09:39Z |
| format | Article |
| id | upm-61501 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T11:09:39Z |
| publishDate | 2017 |
| publisher | Indian Society for Education and Environment |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-615012022-04-04T08:10:50Z http://psasir.upm.edu.my/id/eprint/61501/ Distribution free test for unequal observation of panel count data with application in medical follow-up study Tan, Pei Ling Ibrahim, Noor Akma Arasan, Jayanthi Adam, Mohd Bakri Objectives: In medical follow-up study, patients are treated with different treatments may have different follow-up schedule and the number of patients assigned in each treatment group may not be balanced. To address this, a nonparametric test procedure is proposed. Methods/Statistical Analysis: The proposed test statistics is constructed based on the integrated weighted differences between the mean cumulative function of the recurrences event with condition on treatment group. For performance evaluation, the empirical power of proposed test statistics are evaluated via Monte Carlo simulation study conducted using R statistical software. Findings: Based on simulation results, the proposed method gives a good power for both identical and unequal follow-up processes, even when the sample sizes are imbalanced. Applications/Improvement: The proposed test procedure is also applied to a set of panel count data arises from the National Cooperative Gallstone Study to compare the treatment efficiency. The proposed test procedure able to detect treatment differences and is in line with earlier research. Indian Society for Education and Environment 2017-08 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/61501/1/Distribution%20free%20test%20for%20unequal%20observation%20of%20panel%20count%20data%20with%20application%20in%20medical%20follow-up%20study.pdf Tan, Pei Ling and Ibrahim, Noor Akma and Arasan, Jayanthi and Adam, Mohd Bakri (2017) Distribution free test for unequal observation of panel count data with application in medical follow-up study. Indian Journal of Science and Technology, 10 (31). pp. 1-11. ISSN 0974-6846; ESSN: 0974-5645 https://indjst.org/articles/distribution-free-test-for-unequal-observation-of-panel-count-data-with-application-in-medical-follow-up-study 10.17485/ijst/2017/v10i31/116268 |
| spellingShingle | Tan, Pei Ling Ibrahim, Noor Akma Arasan, Jayanthi Adam, Mohd Bakri Distribution free test for unequal observation of panel count data with application in medical follow-up study |
| title | Distribution free test for unequal observation of panel count data with application in medical follow-up study |
| title_full | Distribution free test for unequal observation of panel count data with application in medical follow-up study |
| title_fullStr | Distribution free test for unequal observation of panel count data with application in medical follow-up study |
| title_full_unstemmed | Distribution free test for unequal observation of panel count data with application in medical follow-up study |
| title_short | Distribution free test for unequal observation of panel count data with application in medical follow-up study |
| title_sort | distribution free test for unequal observation of panel count data with application in medical follow-up study |
| url | http://psasir.upm.edu.my/id/eprint/61501/ http://psasir.upm.edu.my/id/eprint/61501/ http://psasir.upm.edu.my/id/eprint/61501/ http://psasir.upm.edu.my/id/eprint/61501/1/Distribution%20free%20test%20for%20unequal%20observation%20of%20panel%20count%20data%20with%20application%20in%20medical%20follow-up%20study.pdf |