เปรียบเทียบวิธี

	การทดลองแบบ N-of-1	การทดลองสุ่มและมีกลุ่มควบคุม (Randomized Controlled Trial - RCT)
สาขาวิชา	การวิจัยทางคลินิก	การออกแบบการทดลอง
ตระกูล	Process / pipeline	Hypothesis test
ปีกำเนิด	1990s-2010s	1948
ผู้ริเริ่ม	Kravitz, Duan, Vohra, and single-patient methodology pioneers	James Lind (early precursor, 1747); modern formulation: Austin Bradford Hill & Medical Research Council (1948)
ประเภท	Research Design	Interventional comparative study
แหล่งต้นตำรับ	Gabler, N. B., Duan, N., Vohra, S., & Kravitz, R. L. (2011). N-of-1 trials in the medical literature: a systematic review. Medical Care, 49(8), 761–768.	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.
ชื่อเรียกอื่น	single-patient RCT, n=1 trial, individual RCT, crossover n-of-1	RCT, randomised controlled trial, clinical trial, Randomize Kontrollü Çalışma (RCT) Tasarımı
ที่เกี่ยวข้อง	3	7
สรุป	An N-of-1 trial is a single-patient randomized controlled trial in which a patient alternates between treatment A and treatment B (or active drug and placebo) in repeated, randomized cross-over periods. Developed systematically in the 1990s–2010s by Kravitz, Duan, and Vohra, N-of-1 trials enable personalized medicine by determining which treatment works best for that specific individual, avoiding the assumption that population-average effects apply to all patients. They are ideal for chronic conditions with variable outcomes and heterogeneous treatment response.	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).