So sánh phương pháp

	Thử nghiệm lâm sàng Giai đoạn II	Phân tích liều-đáp ứng
Lĩnh vực	Dịch tễ học	Dịch tễ học
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1960s–1970s (formalised in US federal drug regulation)	Conceptual roots 16th century; modern epidemiological application mid-20th century
Người khởi xướng	U.S. Food and Drug Administration / ICH E8 guidelines (institutionalised framework)	Paracelsus (conceptual foundation); formalized by John Snow and later Bradford Hill
Loại	Interventional clinical study design	Quantitative analytical method
Công trình gốc	Friedman, L. M., Furberg, C. D., DeMets, D. L., Reboussin, D. M., & Granger, C. B. (2015). Fundamentals of Clinical Trials (5th ed.). Springer. ISBN: 978-3319185392	Rothman, K. J., Greenland, S., & Lash, T. L. (2008). Modern Epidemiology (3rd ed.). Lippincott Williams & Wilkins. ISBN: 978-0781755641
Tên gọi khác	Phase 2 trial, Phase II study, early efficacy trial, proof-of-concept trial	exposure-response analysis, concentration-response modeling, dose-response modeling, DRA
Liên quan	6	4
Tóm tắt	A Phase II clinical trial is the second stage in the drug or intervention development pipeline, conducted after Phase I safety testing. Its primary goal is to assess whether the intervention shows preliminary efficacy signals in a relevant patient population at the dose established in Phase I, while continuing to characterise the safety and tolerability profile. Phase II trials are generally smaller than Phase III confirmatory trials and serve as critical go/no-go decision points before large-scale investment.	Dose-response analysis quantifies the relationship between the magnitude of an exposure (the dose) and the probability or rate of an outcome (the response). It is a core analytical strategy in epidemiology and toxicology, providing evidence that increasing exposure systematically increases — or decreases — the risk of disease. A demonstrated dose-response gradient is one of Bradford Hill's classic criteria supporting causal inference.