Single-arm study design¶

A single-arm study design is a type of clinical or experimental study where all participants receive the same intervention, with no control or placebo group.

Version: v1 · 2026-09-28 · History
Domain-specific #: 12061
Domain group: Applied Sciences & Engineering
Origin domain: Medicine & Healthcare
Subdomain: Clinical Trials → Medicine & Healthcare

Core Idea¶

Single-arm study design is treated here as the recurring computerscienceandinformation identity summarized by this source-grounded definition: A single-arm study design is a type of clinical or experimental study where all participants receive the same intervention, with no control or placebo group. A single-arm study design is a type of clinical or experimental study where all participants receive the same intervention, with no control or placebo group. The term "single-arm" refers to the presence of only one participant group, in contrast to designs such as randomized controlled trials, which include both a treatment arm and control.

Scope of Application¶

Overview. This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices.
Overview. As a result, single arm trials are used to address these concerns.
Applications. This design is most commonly used in early-phase clinical trials or in studies of rare or serious diseases, where including a control group may be impractical or unethical.
Interpreting results. This can include benchmarks established from previous studies or historical control data, and are used to define minimum efficacy thresholds and expected performance ranges.
Interpreting results. In oncology, time-to-event outcomes such as progression-free survival and overall survival may be used to assess treatment effects.

Clarity¶

A clear use of Single-arm study design names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is A single-arm study design is a type of clinical or experimental study where all participants receive the same intervention, with no control or placebo group.

Manages Complexity¶

Single-arm study design compresses multiple computerscienceandinformation details into a stable diagnostic relation. The source shows both the central mechanism—this type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices.—and the practical consequence—this design is most commonly used in early-phase clinical trials or in studies of rare or serious diseases, where including a control group may.

Abstract Reasoning¶

Type the carrier. Identify the computerscienceandinformation entities to which the claim applies.
State the relation. Use the source-grounded identity: A single-arm study design is a type of clinical or experimental study where all participants receive the same intervention, with no control or placebo group.
Check operation and conditions. While randomized control trials are considered the “gold standard” in clinical research, they are not always feasible due to limitations in the study population, challenges in obtaining evidence, high costs, and ethical considerations.
Demand recognition evidence.

Knowledge Transfer¶

Within the home domain. Knowledge about Single-arm study design transfers literally when a new case preserves the same carrier type, relation, and recognition test. This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices. As a result, single arm trials are used to address these concerns. Beyond the home domain. No canonical parent is asserted for Single-arm study design.

Relationships to Other Abstractions¶

Current abstraction Single-arm study design Domain-specific

Parents (1) — more general patterns this builds on

Single-arm study design is a kind of Clinical Study Design Domain-specific

Single-arm study design is a kind of Clinical Study Design with a stable domain-specific differentia.

Hierarchy path (1) — routes to 1 parentless root

Single-arm study design → Clinical Study Design

Neighborhood in Abstraction Space¶

Single-arm study design sits in a moderately populated region (57^th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.

Family — Clinical Trial & Research Methodology (20 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08