東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Assessing treatment effect heterogen...

Mascha, Edward Joseph.

FindBook

Google Book

Amazon

博客來

Assessing treatment effect heterogeneity for binary outcomes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Assessing treatment effect heterogeneity for binary outcomes./
作者:	Mascha, Edward Joseph.
面頁冊數:	180 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5493.
Contained By:	Dissertation Abstracts International65-11B.
標題:	Biology, Biostatistics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3154132
ISBN:	9780496149452

Assessing treatment effect heterogeneity for binary outcomes.
Mascha, Edward Joseph.

Assessing treatment effect heterogeneity for binary outcomes. - 180 p.

Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5493.

Thesis (Ph.D.)--Case Western Reserve University (Health Sciences), 2005.

Randomized clinical trials with binary outcomes typically focus on the mean treatment effect for patients on treatment (T) and control (C), and in doing so ignore the possibility of unit-treatment interaction, or individual treatment effect heterogeneity (TEH). We assume an individual falls into one of four categories based on his/her potential outcomes: failure on T and C, success on T and C, or success on one or the other. We want to learn about the four underlying probabilities corresponding to membership in these categories. Our problem is that in a parallel group study only half the potential outcomes are observed for each individual. We use a potential outcome framework to make inference about the amount of TEH that is likely to exist in a randomized or non-randomized study.

ISBN: 9780496149452Subjects--Topical Terms:

1018416
Biology, Biostatistics.

Assessing treatment effect heterogeneity for binary outcomes.
LDR:03132nmm 2200313 4500 001 1822841
005 20061127103215.5
008 130610s2005 eng d
020 $a 9780496149452
035 $a (UnM)AAI3154132
035 $a AAI3154132
040 $a UnM $c UnM
100 1 $a Mascha, Edward Joseph. $3 1911971
245 1 0 $a Assessing treatment effect heterogeneity for binary outcomes.
300 $a 180 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5493.
500 $a Adviser: Jeffrey M. Albert.
502 $a Thesis (Ph.D.)--Case Western Reserve University (Health Sciences), 2005.
520 $a Randomized clinical trials with binary outcomes typically focus on the mean treatment effect for patients on treatment (T) and control (C), and in doing so ignore the possibility of unit-treatment interaction, or individual treatment effect heterogeneity (TEH). We assume an individual falls into one of four categories based on his/her potential outcomes: failure on T and C, success on T and C, or success on one or the other. We want to learn about the four underlying probabilities corresponding to membership in these categories. Our problem is that in a parallel group study only half the potential outcomes are observed for each individual. We use a potential outcome framework to make inference about the amount of TEH that is likely to exist in a randomized or non-randomized study.
520 $a We focus on bounds for the probability of latently doing worse on a new T than on C, which we call pi01, and which may be understood as the treatment risk. We evaluate properties of existing bound estimators on pi01 which make use of the marginal success probabilities and clustering. Data are simulated from the Dirichlet multinomial (DMN), and estimator properties are assessed under varying degrees of underlying intraclass correlation (ICC) and TEH. Confidence intervals (CI) and coverage properties for lower and upper bound estimators of the heterogeneity parameters of interest are assessed.
520 $a Bounds on pi01 are shown to depend heavily on the marginal success probabilities. Bound estimators are shown to have low bias and mean squared error which increases with the ICC. Joint confidence intervals of the lower and upper bounds allow inference on the plausible underlying values of pi01, with widths narrowing with increasing cluster size and ICC.
520 $a We also show that assuming the DMN model for the underlying potential outcomes, the heterogeneity parameters of interest can be estimated. Under fewer assumptions, we are able to test the independence of the potential outcomes using a novel declustering technique. We analyze two datasets, a randomized trial and an observational study, to demonstrate the applicability of these methods and how they can be interpreted and utilized.
590 $a School code: 0499.
650 4 $a Biology, Biostatistics. $3 1018416
650 4 $a Statistics. $3 517247
690 $a 0308
690 $a 0463
710 2 0 $a Case Western Reserve University (Health Sciences). $3 1250782
773 0 $t Dissertation Abstracts International $g 65-11B.
790 1 0 $a Albert, Jeffrey M., $e advisor
790 $a 0499
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3154132