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http://hdl.handle.net/1942/26594
Title: | An extension of generalized pairwise comparisons for prioritized outcomes in the presence of censoring | Authors: | Peron, Julien BUYSE, Marc Ozenne, Brice Roche, Laurent Roy, Pascal |
Issue Date: | 2018 | Source: | STATISTICAL METHODS IN MEDICAL RESEARCH, 27(4), p. 1230-1239 | Abstract: | Generalized pairwise comparisons have been proposed to permit a comprehensive assessment of several prioritized outcomes between two groups of observations. This procedure estimates , the net chance of a better outcome with treatment than with control by comparing the patients outcomes among all possible pairs taking one patient from the treatment group and one patient from the control group. For time to event outcomes, the standard procedure of generalized pairwise comparisons is analogous to the Gehan's modification of the Mann-Whitney test which is biased in presence of censored observation and less powerful than Efron's modification of this test. We adapt Efron's modification to generalized pairwise comparisons. We show how a pairwise contribution to can be calculated from the estimates of the survival function in the presence of right-censored data. We performed a simulation study to assess the bias, the type I error and the power of the new procedure. The estimate of with the new procedure is only slightly biased even in presence of heavy censoring. We also show how this bias can be corrected when only one time-to-event outcome is analyzed. The new procedure has higher power in most cases compared to the standard procedure. | Notes: | Peron, J (reprint author), Ctr Hosp Lyon Sud, Serv Biostat, 165 Chemin Grand Revoyet, F-69310 Pierre Benite, France. julien.peron@chu-lyon.fr | Keywords: | pairwise comparisons; multivariate analysis; randomized trial; survival outcome | Document URI: | http://hdl.handle.net/1942/26594 | ISSN: | 0962-2802 | e-ISSN: | 1477-0334 | DOI: | 10.1177/0962280216658320 | ISI #: | 000429948100019 | Rights: | (C) The Author(s) 2018 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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