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 computer_science_and_information 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 or placebo arm. This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices.

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. As a result, single arm trials are used to address these concerns. Since there is no randomization in single-arm trials, all patients receive the same intervention within a particular study/trial.

For Single-arm study design, the abstraction is narrower than the article's general subject matter: a positive case must preserve 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. Retaining only the name, a familiar example, or a downstream effect is insufficient. The specialist roles and tests remain anchored in computer_science_and_information, which is why this identity is domain-specific rather than prime.

Structural Signature¶

Sig role-phrases:

Defining carrier — Single-arm trials include one experimental group without the inclusion of a parallel control group.
Constitutive relation — This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices.
Operating condition — 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.
Recognition evidence — As a result, single arm trials are used to address these concerns.
Admissible variation — Since there is no randomization in single-arm trials, all patients receive the same intervention within a particular study/trial.
Characteristic 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 be impractical or unethical.
Failure boundary — Phase I studies primarily assess safety, tolerability, and pharmacokinetics over a relatively short duration.

What It Is Not¶

Not the whole field of computer_science_and_information. The node requires the specific identity stated by 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.
Not an over-broad reading. 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.
Not an over-broad reading. The design is open-label and does not involve randomization or blinding.
Not an over-broad reading. Single-arm trials include one experimental group without the inclusion of a parallel control group.
Not automatically N-of-1 Trial. Retrieval proximity does not establish equivalence; the two identities must be compared by carrier, operation, and failure boundary.

Scope of Application¶

Single-arm study design applies literally inside computer_science_and_information wherever the source-defined carrier and relation can be established. Its documented habitats include:

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.
Applications. They are used to inform dose selection for subsequent studies.

Outside computer_science_and_information, the name should be retained only when these same operational conditions survive; otherwise the comparison belongs to the broader parent Classification or should be marked as analogy.

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. The strongest recognition evidence in the frozen account is: As a result, single arm trials are used to address these concerns. A report should distinguish that evidence from a proxy, consequence, or common implementation. It should also state the qualification 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. so that a reader can reproduce the classification rather than infer it from topical resemblance.

Manages Complexity¶

Single-arm study design compresses multiple computer_science_and_information 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 be impractical or unethical. This compression makes cases comparable while leaving parameters, conventions, exceptions, and evidential quality explicit. It is lossy by design: local history and implementation details may be omitted only when they do not alter the defining relation.

Abstract Reasoning¶

Type the carrier. Identify the computer_science_and_information 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. As a result, single arm trials are used to address these concerns.
Test variation. Change an implementation or setting while preserving since there is no randomization in single-arm trials, all patients receive the same intervention within a particular study/trial.
Run the collapse test. Remove the defining operation; if the label still seems equally apt, only a topic or correlate was retained.
Reduce cautiously. When the specialist conditions cannot be carried, route the residual comparison to Classification.

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. An outside case receives the specialist name only when the same typed roles and rejection conditions can be filled literally; otherwise the comparison remains an analogy pending later graph densification.

Examples¶

Canonical¶

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. This case is canonical because it supplies a concrete carrier and lets the defining relation be checked rather than merely named.

Mapped back: carrier → the entities in the documented case; operation → 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; recognition evidence → As a result, single arm trials are used to address these concerns

Applied / In Practice¶

In oncology, time-to-event outcomes such as progression-free survival and overall survival may be used to assess treatment effects. The applied case shows how the identity is used under a second setting or qualification while keeping the same operative relation.

Mapped back: changed setting → Interpreting results; invariant → 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; boundary → the case exits the class when 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

Structural Tensions¶

T1 — Stable identity versus admissible variation. 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. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Which changes preserve the defining relation, and which replace it?

T2 — Recognition versus proxy. The design is open-label and does not involve randomization or blinding. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Does the cited evidence establish the identity or only a correlated sign?

T3 — Definition versus implementation. Single-arm trials include one experimental group without the inclusion of a parallel control group. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Is the observed implementation constitutive, optional, or merely common?

T4 — Scope versus overextension. This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Can every claimed application fill the same typed roles without metaphor?

T5 — Transfer versus domain accent. Single-arm trials include one experimental group without the inclusion of a parallel control group. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: Does the receiving case instantiate Single-arm study design literally, co-instantiate Classification, or only resemble it?

T6 — Autonomy versus reduction. This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices. The tension matters because emphasizing only one side either dissolves the identity or overstates what the evidence and domain conventions warrant.

Diagnostic: What does Single-arm study design distinguish that the broader parent Classification leaves together?

Structural–Framed Character¶

Single-arm study design is structural-leaning. Its structural side is the repeatable organization summarized by 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. Its framed side is the computer_science_and_information vocabulary that fixes the carrier, evidence, exceptions, and admissible transformations.

Evaluative weight: the identity can be stated descriptively even when applications carry practical stakes. Human-practice dependence: the source-grounded carrier determines whether the relation exists independently or is constituted by a practice. Institutional origin: disciplinary conventions stabilize the name and test. Vocabulary portability: 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. Import versus recognition: literal transfer requires the same mechanism; shape alone is analogy.

Its portable skeleton is Classification. Its character: a recurring specialist identity whose thin organization can be abstracted, while its operational meaning remains domain-bound.

Structural Core vs. Domain Accent¶

What is skeletal. 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 stable skeleton is the typed relation expressed in that definition and the entry's recognition and collapse tests. The source identifies these operative conditions: Single-arm trials include one experimental group without the inclusion of a parallel control group. This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices. It further constrains recognition and variation through: 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. As a result, single arm trials are used to address these concerns.

What is domain-bound. computer science and information supplies the operative entities, technical vocabulary, warrants, and exceptions that make Single-arm study design literal. Its documented scope includes the condition that This type of study design is commonly applied to advanced stage cancer, rare diseases, emerging infectious diseases, new treatment methods, and medical devices. Another bounded application condition is that As a result, single arm trials are used to address these concerns. These are not decorative examples; they determine which carrier and evidence can fill the abstraction's roles.

Why no parent is asserted. Removing those specialist details does not currently yield one live catalog node that is a necessary genus for every instance. The entry is therefore approved as unparented rather than attached by topical resemblance. Its collapse evidence remains specific—Since there is no randomization in single-arm trials, all patients receive the same intervention within a particular study/trial.—and future graph densification may discover a defensible relation only if it preserves that boundary.

This entry is a kind of Clinical Study Design.

Approved unparented node. No current live node supplies a defensible necessary genus or structural prerequisite for Single-arm study design. The reviewed identity 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. The accelerated suggestion was declined because topical or lexical similarity does not establish hierarchy; the node is admitted without a parent pending later graph densification.
Related reasoning operations. Evidence, representation, comparison, classification, transformation, or evaluation may participate in particular cases, but participation does not make any one of them a necessary parent of every instance.

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

Not to Be Confused With¶

Classification. The parent omits the specialist differentia. Tell: Can the case establish 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?
N-of-1 Trial. A prospectively planned multiple-crossover experiment in one participant that repeats intervention and comparator periods to estimate that participant's treatment response. Tell: Which entry's carrier, operation, and failure condition are satisfied?
Experimental Design. Structuring an investigation through deliberate intervention, controlled assignment, and measurement so that causation can be distinguished from mere correlation and confounding. Tell: Which entry's carrier, operation, and failure condition are satisfied?
Multiple baseline design. A single-case experimental design that staggers introduction of an intervention across behaviors, participants or settings to replicate causal change without withdrawing treatment. Tell: Which entry's carrier, operation, and failure condition are satisfied?
A measurement, proxy, or consequence. Those may provide evidence without being the identity. Tell: Would Single-arm study design remain present if the detector or downstream effect changed?
A metaphorical analogue. A similar shape outside computer_science_and_information lacks the specialist mechanism. Tell: Do the native roles transfer literally, or only the parent Classification?

References¶

Frozen Wikipedia discovery revision: https://en.wikipedia.org/wiki/Single-arm_study_design (revision 1362132440).
Preserved source candidate: https://spcare.bmj.com/lookup/doi/10.1136/spcare-2024-004984
Preserved source candidate: https://www.jstage.jst.go.jp/article/ace/7/3/7_25011/_article
Preserved source candidate: https://aacrjournals.org/clincancerres/article/16/6/1764/76067/The-Design-of-Phase-II-Clinical-Trials-Testing

The frozen Wikipedia revision is discovery provenance. The retained source set was reviewed for identity, formal or operational relation, and scope. The encyclopedia's structural synthesis is bounded to those claims; a thin authority surface is recorded as a nonblocking source-strengthening repair rather than concealed.