J
J Zhang
Researcher at Merck & Co.
Publications - 3
Citations - 457
J Zhang is an academic researcher from Merck & Co.. The author has contributed to research in topics: Asthma & Randomized controlled trial. The author has an hindex of 3, co-authored 3 publications receiving 426 citations.
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Journal ArticleDOI
What are minimal important changes for asthma measures in a clinical trial
TL;DR: Patients in a randomized, placebo-controlled clinical trial of a leukotriene antagonist experienced less mean improvement from baseline than active-treated patients and younger patients, who reported minimal improvement.
Journal Article
Measurement characteristics of two asthma symptom diary scales for use in clinical trials
TL;DR: The daytime and nocturnal asthma symptom diary scales show measurement characteristics appropriate for use as asthma outcome measures in clinical trials of asthma therapy, including significant responsiveness to change in asthma due to therapy in one of the clinical trials.
Journal ArticleDOI
Variability and lack of predictive ability of asthma end-points in clinical trials
TL;DR: The results showed that multiple measurements over a length of time are needed to establish a more complete profile of response, and that demographic and early treatment responses had a small but inadequate ability to predict future response.