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Response by Denti and Schulz to Letter Regarding Article, "Impact on Prehospital Delay of a Stroke Preparedness Campaign: A SW-RCT (Stepped-Wedge Cluster Randomized Controlled Trial)".

作者信息

Denti Licia, Schulz Peter J

机构信息

Geriatrics Ward-Stroke Care Section, University Hospital of Parma, Italy.

Institute of Communication and Health, University of Svizzera Italiana, Lugano, Switzerland.

出版信息

Stroke. 2018 Apr;49(4):e166. doi: 10.1161/STROKEAHA.118.020413. Epub 2018 Feb 22.

DOI:10.1161/STROKEAHA.118.020413
PMID:29472283
Abstract
摘要

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1
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Stepped wedge designs could reduce the required sample size in cluster randomized trials.阶梯式楔形设计可以减少群组随机试验所需的样本量。
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The stepped wedge cluster randomized trial always requires fewer clusters but not always fewer measurements, that is, participants than a parallel cluster randomized trial in a cross-sectional design. In reply.阶梯楔形整群随机试验通常需要的群组较少，但在横断面设计中，其测量次数（即参与者数量）并不总是比平行整群随机试验少。作为回应。
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