So sánh phương pháp

	Thử nghiệm ngẫu nhiên phân cụm theo hình nêm bậc thang	Thử nghiệm ngẫu nhiên theo cụm
Lĩnh vực	Suy luận nhân quả	Nghiên cứu lâm sàng
Họ	Regression model	Process / pipeline
Năm ra đời	2007	1999-2000
Người khởi xướng	Hussey and Hughes	Campbell, Grimshaw, Elbourne et al.
Loại	Phased implementation trial design	Research Design
Công trình gốc	Hemming, K., Haines, T. P., Chilton, P. J., Girling, A. J., & Lilford, R. J. (2015). The stepped wedge cluster randomised trial: rationale, design, analysis, and reporting. British Medical Journal, 350, h391.	Campbell, M. K., Grimshaw, J. M., & Elbourne, D. R. (2000). Intracluster correlation coefficients in cluster randomized trials: empirical insights into how should they be reported. BMC Medical Research Methodology, 4, 30.
Tên gọi khác	SWCRT, SW-CRT, Stepped Wedge Design	CRT, cluster RCT, cluster trial, group randomization
Liên quan	3	3
Tóm tắt	A stepped wedge cluster randomized trial is an experimental design where clusters (e.g., schools, hospitals, communities) are randomized to receive an intervention in a phased, staggered manner over time. First formally described by Hussey and Hughes in 2007, this design combines the benefits of cluster randomization with a time-stepped implementation strategy. It is particularly useful for evaluating the effectiveness of interventions in real-world healthcare and public health settings.	A cluster randomized trial (CRT) randomizes intact groups—schools, clinics, villages, or hospital wards—rather than individuals. Developed by Campbell, Grimshaw, and colleagues in the late 1990s to address real-world settings where intervention delivery or contamination occurs at the group level, CRTs are now standard for evaluating population-level, community-based, and policy interventions.