Abstract:
:We consider two exact unconditional procedures to test the difference between two multinomials with ordered categorical data. Exact unconditional procedures are compared to other approaches based on the Wilcoxon mid-rank test and the proportional odds model. We use a real example from an arthritis pain study to illustrate the various test procedures and provide an extensive numerical study to compare procedures with regards to type I error rates and power under the unconditional framework. The exact unconditional procedure based on estimation followed by maximization is generally more powerful than other procedures, and is therefore recommended for use in practice.
journal_name
Stat Methods Med Resjournal_title
Statistical methods in medical researchauthors
Shan G,Ma Cdoi
10.1177/0962280212450957subject
Has Abstractpub_date
2016-02-01 00:00:00pages
241-54issue
1eissn
0962-2802issn
1477-0334pii
0962280212450957journal_volume
25pub_type
杂志文章abstract::Recently, the joint analysis of longitudinal and survival data has been an active research area. Most joint models focus on survival data with only one type of failure. The research on joint modeling of longitudinal and competing risks survival data is sparse. Even so, many joint models for this type of data assume pa...
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