مقایسهٔ روش‌ها

	مطالعه سری موردی تطبیقی	مجموعه موارد - مطالعه مشاهده‌ای توصیفی
حوزه	اپیدمیولوژی	اپیدمیولوژی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	Late 20th–early 21st century	Longstanding; systematized in 20th century clinical research
پدیدآور	Evolved from classical case series methodology combined with adaptive design principles (Chow & Chang, 2008; FDA adaptive design guidance)	Historical clinical practice; formalized in modern evidence-based medicine literature
نوع	Observational study with adaptive monitoring	Observational descriptive study
منبع بنیادین	Chow, S.-C., & Chang, M. (2008). Adaptive Design Methods in Clinical Trials. Chapman & Hall/CRC. ISBN: 978-1584887775	Case series. Wikipedia.
نام‌های دیگر	adaptive case-series design, sequential adaptive case series, adaptive observational case series	case series report, clinical case series, consecutive case series, patient series
مرتبط	5	5
خلاصه	An adaptive case series is an observational study design that documents a consecutive group of patients with a shared condition or exposure while incorporating pre-specified rules for modifying data collection, monitoring, or stopping criteria as accumulating evidence warrants. It combines the descriptive richness of traditional case series with the prospective flexibility of adaptive design principles, enabling structured mid-course adjustments without compromising the integrity of the recorded clinical observations.	A case series is a descriptive observational study that documents the characteristics, clinical course, and outcomes of a group of patients who share a common condition, exposure, or intervention. Unlike case reports, which focus on a single patient, a case series aggregates data across multiple patients (typically three or more) to identify patterns, generate hypotheses, and characterize rare or novel conditions — without a concurrent control group.