قارن الطرق

	التجربة العشوائية العنقودية	التجربة المعشاة ذات الشواهد (RCT)
المجال	البحوث السريرية	التصميم التجريبي
العائلة	Process / pipeline	Hypothesis test
سنة النشأة	1999-2000	1948
صاحب الطريقة	Campbell, Grimshaw, Elbourne et al.	James Lind (early precursor, 1747); modern formulation: Austin Bradford Hill & Medical Research Council (1948)
النوع	Research Design	Interventional comparative study
المصدر التأسيسي	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.	Schulz, K.F., Altman, D.G., Moher, D., for the CONSORT Group (2010). CONSORT 2010 Statement: Updated Guidelines for Reporting Parallel Group Randomised Trials. BMJ, 340, c332.
الأسماء البديلة	CRT, cluster RCT, cluster trial, group randomization	RCT, randomised controlled trial, clinical trial, Randomize Kontrollü Çalışma (RCT) Tasarımı
ذات صلة	3	7
الملخص	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.	A randomized controlled trial (RCT) is the gold standard experimental design in clinical and health research, in which participants are randomly allocated to a treatment group or a control group so that the effect of an intervention can be measured with the highest possible degree of internal validity. The modern parallel-group RCT was formalized by Austin Bradford Hill and the Medical Research Council in their landmark streptomycin trial of 1948, and its reporting is governed today by the CONSORT 2010 guidelines (Schulz et al., 2010).