เปรียบเทียบวิธี

	การศึกษาเชิงนิเวศเชิงปฏิบัติ	การศึกษาทางระบาดวิทยาภาคตัดขวาง
สาขาวิชา	ระบาดวิทยา	ระบาดวิทยา
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1967–1982 (pragmatic concept 1967; ecological study formalized ~1982)	1960s (formal codification); widely practiced since mid-20th century
ผู้ริเริ่ม	Morgenstern (ecological study framework); Schwartz & Lellouch (pragmatic design concept)	Classical epidemiology tradition; systematized by Brian MacMahon and Thomas Pugh (1960s)
ประเภท	Observational ecological study with pragmatic framing	Observational, descriptive/analytic epidemiological design
แหล่งต้นตำรับ	Morgenstern, H. (1982). Uses of ecologic analysis in epidemiologic research. American Journal of Public Health, 72(12), 1336–1344.	Kelsey, J. L., Whittemore, A. S., Evans, A. S., & Thompson, W. D. (1996). Methods in Observational Epidemiology (2nd ed.). Oxford University Press. ISBN: 978-0195080407
ชื่อเรียกอื่น	real-world ecological study, effectiveness ecological study, population-level pragmatic study, pragmatic ecologic design	prevalence study, cross-sectional survey, transversal study, cross-sectional design
ที่เกี่ยวข้อง	5	6
สรุป	A pragmatic ecological study is an observational epidemiological design that examines associations between exposures and outcomes at the population or group level — using routinely collected, real-world data — with the explicit goal of informing practical public health decisions under everyday conditions. Rather than controlling every variable in a laboratory-like manner, it embraces the complexity and heterogeneity of natural settings to answer effectiveness questions relevant to policy.	A cross-sectional epidemiological study measures the exposure(s) and outcome(s) of interest simultaneously in a defined population at a single point in time (or over a short period). Because there is no follow-up, it is the most efficient observational design for estimating disease prevalence and for generating hypotheses about associations between risk factors and health outcomes.