Article ; Online: Statistical Methods to Evaluate Surrogate Markers.
2023 Volume 62, Issue 2, Page(s) 102–108
Abstract: Background: There is tremendous interest in evaluating surrogate markers given their potential to decrease study time, costs, and patient burden.: Objectives: The purpose of this statistical workshop article is to describe and illustrate how to ... ...
Abstract | Background: There is tremendous interest in evaluating surrogate markers given their potential to decrease study time, costs, and patient burden. Objectives: The purpose of this statistical workshop article is to describe and illustrate how to evaluate a surrogate marker of interest using the proportion of treatment effect (PTE) explained as a measure of the quality of the surrogate marker for: (1) a setting with a general fully observed primary outcome (eg, biopsy score); and (2) a setting with a time-to-event primary outcome which may be censored due to study termination or early drop out (eg, time to diabetes). Methods: The methods are motivated by 2 randomized trials, one among children with nonalcoholic fatty liver disease where the primary outcome was a change in biopsy score (general outcome) and another study among adults at high risk for Type 2 diabetes where the primary outcome was time to diabetes (time-to-event outcome). The methods are illustrated using the Rsurrogate package with a detailed R code provided. Results: In the biopsy score outcome setting, the estimated PTE of the examined surrogate marker was 0.182 (95% confidence interval [CI]: 0.121, 0.240), that is, the surrogate explained only 18.2% of the treatment effect on the biopsy score. In the diabetes setting, the estimated PTE of the surrogate marker was 0.596 (95% CI: 0.404, 0.760), that is, the surrogate explained 59.6% of the treatment effect on diabetes incidence. Conclusions: This statistical workshop provides tools that will support future researchers in the evaluation of surrogate markers. |
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MeSH term(s) | Child ; Humans ; Treatment Outcome ; Diabetes Mellitus, Type 2 ; Biomarkers |
Chemical Substances | Biomarkers |
Language | English |
Publishing date | 2023-12-11 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 411646-x |
ISSN | 1537-1948 ; 0025-7079 |
ISSN (online) | 1537-1948 |
ISSN | 0025-7079 |
DOI | 10.1097/MLR.0000000000001956 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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