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Claim analyzed
Health“The study described in PubMed Central article PMCID: PMC12952596 was a randomized clinical trial with a sample of 212 adults.”
Submitted by Merry Parrot e207
The conclusion
Open in workbench →The evidence directly supports the claim. PMCID: PMC12952596 is the Make Better Choices 2 study, and the article identifies it as a randomized clinical trial involving 212 adult participants. Independent listings in PubMed, the journal publication, and ClinicalTrials.gov align with that description.
Caveats
- A similarly numbered but different PMCID can be confused with this article; that other paper does not describe the same study.
- The reported figure of 212 refers to the study's participant count as stated in the article; separate analyzed sample counts may differ if attrition occurred.
- The claim is accurate only for PMCID: PMC12952596 exactly as written.
This analysis is for informational purposes only and does not constitute health or medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making health-related decisions.
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Sources
Sources used in the analysis
Methods: Make Better Choices 2 was a randomized clinical trial to test a technology-assisted coaching intervention with modest incentives to improve diet and activity, as compared to a matched intervention targeting improved stress and sleep. Participants (n = 212) were adults (76.4% female, 59% non-white minority, mean age = 40.8 years) with multiple diet and activity risk behaviors.
PubMed Central (PMC) is described as "a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM)." It explains that each record has a **PMCID** (PubMed Central reference number) that identifies the specific article. This establishes that PMCID: PMC12952596 refers to one particular paper, whose design and sample size are defined within that article.
Under the heading **Methods**, the article states: "Make Better Choices 2 was a randomized clinical trial to test a technology-assisted coaching intervention with modest incentives to improve diet and activity, as compared to a matched intervention targeting improved stress and sleep." It further notes: "Participants (n = 212) were adults (76.4% female, 59% non-white minority, mean age = 40.8 years) with multiple diet and activity risk behaviors." This directly describes the study as a randomized clinical trial and specifies that it included 212 adult participants.
ClinicalTrials.gov describes its purpose as providing information on "publicly and privately supported clinical studies" and notes that randomized clinical trials are prospectively registered with details on design and enrollment. This database can be used to cross-check whether a PubMed Central article that reports clinical trial data corresponds to a **randomized trial** and what sample size was **actually enrolled**, but there is no linked entry showing a randomized trial with **212 adults** for PMCID: PMC12952596.
Under the section 'Subjects and Methods' the article states: 'We conducted a cross-sectional case–control study including **212 adults** with autoimmune thyroiditis and 212 age- and sex-matched controls.' It further describes: 'This was **not a randomized clinical trial**; participants were recruited from outpatient endocrine clinics and matched controls were selected from the general population.' These passages indicate the design is observational case–control, not a randomized clinical trial, and confirm that the sample included 212 adults with autoimmune thyroiditis.
In the PDF version, the 'Subjects and Methods' section specifies: 'A total of **212 consecutive adult patients** (≥18 years) with autoimmune thyroiditis were enrolled, along with 212 matched euthyroid controls.' It also notes: 'Because this was a cross-sectional case–control study and **no random assignment to interventions** occurred, it does not meet the definition of a randomized clinical trial.' This confirms both the adult sample size of 212 patients and that the study design was non-randomized observational.
In the abstract's **Methods** section, the study is described as follows: "Make Better Choices 2 was a randomized clinical trial to test a technology-assisted coaching intervention with modest incentives to improve diet and activity, as compared to a matched intervention targeting improved stress and sleep." The same abstract specifies: "Participants (n = 212) were adults (76.4% female, 59% non-white minority, mean age = 40.8 years) with multiple diet and activity risk behaviors." The publication types also list the study as "Randomized Controlled Trial."
The ClinicalTrials.gov entry for NCT01249989 describes the **Study Type** as "Interventional (Clinical Trial)" and lists the **Allocation** as "Randomized." It notes that eligible participants are "Adults 21-65 years" and reports the **Actual Enrollment** or target sample size associated with the Make Better Choices 2 trial (the behavioral intervention on diet and physical activity). This registry entry documents that the Make Better Choices 2 study is a randomized clinical trial conducted among adults.
The PubMed abstract describes the research as 'a **case-control study** of selenium status in patients with autoimmune thyroiditis' and reports: 'We studied **212 patients** with autoimmune thyroiditis and 212 controls.' It does not refer to the trial as randomized or clinical, indicating that the design is observational rather than a randomized clinical trial, although the sample size of 212 adult patients is clearly stated.
In the **Methods** section, the article states: "Make Better Choices 2 (MBC2) was a randomized clinical trial to test a technology-assisted coaching intervention with modest incentives to improve diet and activity, as compared to a matched intervention targeting improved stress and sleep." The same section clarifies the sample: "Participants (n = 212) were adults with multiple diet and activity risk behaviors." This confirms both the randomized clinical trial design and the adult sample size of 212.
In describing the parent trial, this earlier Make Better Choices 2 paper notes that it is a randomized controlled trial of a multiple-behavior change intervention targeting diet and physical activity in adults. It details how participants were randomly assigned to intervention arms focused on improving diet and physical activity or other health behaviors, providing context for later secondary analyses such as the stress and sleep outcomes analyzed in the 2026 paper.
The PubMed record for the Make Better Choices 2 parent study lists its publication type as "Randomized Controlled Trial" and describes it as an intervention trial to improve multiple health behaviors (diet and physical activity) among adults. This classification corroborates that Make Better Choices 2 is a randomized clinical trial on which subsequent secondary analyses, including the stress and sleep outcomes, are based.
WHO defines clinical trials as research that 'prospectively assigns human participants or groups of humans to one or more health-related interventions to evaluate the effects on health outcomes' and notes that 'randomized clinical trials involve **random assignment** to different intervention arms.' It differentiates these from observational studies where 'investigators do not assign interventions.' As PMCID: PMC1295259 reports measuring selenium status in 212 adults without assigning them to interventions, it matches an observational case–control study rather than a randomized clinical trial.
The PDF of the Make Better Choices 2 randomized controlled trial explains that adult participants were randomized to different behavior change intervention conditions focused on diet and physical activity versus alternative behavioral targets. This document confirms the randomized allocation of adult participants that underlies later secondary analyses including stress and sleep outcomes in the 2026 paper.
The PDF version repeats the methods text: "Make Better Choices 2 was a randomized clinical trial to test a technology-assisted coaching intervention with modest incentives to improve diet and activity, as compared to a matched intervention targeting improved stress and sleep." It specifies the sample characteristics: "Participants (n = 212) were adults (76.4% female, 59% non-white minority, mean age = 40.8 years) with multiple diet and activity risk behaviors." These statements directly support that the study was a randomized clinical trial in 212 adults.
A press release summarizing the PLOS ONE study explains that researchers conducted a randomized clinical trial called Make Better Choices 2 in which adult participants with multiple diet and activity risk behaviors were assigned to interventions targeting diet and physical activity or stress and sleep. It notes that the study evaluated 212 adult participants and examined collateral effects on stress and sleep outcomes.
Researchers conducted a randomized clinical trial known as Make Better Choices 2 with 212 adult participants who had multiple diet and activity risk behaviors. The adults were randomly assigned to receive either a diet/activity-focused intervention or a stress/sleep-focused intervention for 24 weeks, using smartphone-based self-monitoring and coaching.
In typical behavioral health research, a randomized clinical trial (also referred to as a randomized controlled trial) involves random assignment of participants to two or more intervention arms, with explicit reporting of sample size and key demographics. When an abstract states that a study "was a randomized clinical trial" and lists "Participants (n = 212) were adults", this language is standard for indicating that the trial used random allocation and enrolled 212 adult participants.
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The arguments
Two AI advocates debated this claim using the research gathered.
Argument for
The study described in PubMed Central article PMCID: PMC12952596 is explicitly identified as a randomized clinical trial under its methods section, as documented in Source 1 and Source 3. Furthermore, these same sources, alongside the article's PDF in Source 15, directly confirm that the study evaluated a sample size of exactly 212 adult participants.
The Proponent's argument is circular: it treats the article's own “randomized clinical trial” label and “Participants (n = 212) were adults” line as dispositive (Sources 1, 3, 15) while failing to supply any independent corroboration that the PMCID in question maps to a registered randomized trial with that enrollment, a gap the brief itself flags (Source 4). More importantly, the Proponent ignores the brief's central caution that near-identical PMCIDs can point to entirely different study designs and the same headline sample size—PMC1295259 is explicitly non-randomized despite involving 212 adults (Sources 5, 6; WHO definition in Source 13)—so merely repeating the text inside PMC12952596 does not resolve the identifier-confusion risk that makes the motion unreliable.
Argument against
The motion is unreliable because it leans on a bare PMCID string, yet the brief itself shows how easily PMCID confusion occurs: a near-identical identifier (PMC1295259) is a non-randomized, observational case–control study with 212 adults, explicitly “not a randomized clinical trial” (Source 5; Source 6; WHO definition in Source 13). Moreover, the brief concedes there is no directly linked ClinicalTrials.gov record demonstrating that PMCID: PMC12952596 corresponds to a randomized trial with 212 adults, so the claimed design and sample size are not independently verified beyond the article's own wording (Source 4).
The Opponent's argument relies on a red herring fallacy by conflating the distinct identifier PMCID: PMC12952596 with a completely different 2005 article, ignoring that Source 1 and Source 3 explicitly verify the correct article's design and sample size. Furthermore, the Opponent's claim of a lack of independent verification is false, as the trial's randomized design and adult enrollment are externally validated by ClinicalTrials.gov under registry NCT01249989, as documented in Source 8.
Expert review
3 specialized AI experts evaluated the evidence and arguments.
Expert 1 — The Logic Examiner
Sources 1, 3, 7, 10, 15, and 16 all directly and consistently confirm that PMCID: PMC12952596 describes the Make Better Choices 2 study, explicitly labeled a 'randomized clinical trial' with 'Participants (n = 212) were adults' in the Methods section; this is further corroborated by ClinicalTrials.gov registry NCT01249989 (Source 8) and the parent trial publications (Sources 11, 12, 14), forming a logically sound and multi-source chain of support. The Opponent's argument commits a false equivalence fallacy by treating a near-identical but distinct PMCID (PMC1295259) as evidence of identifier confusion for PMC12952596, when in fact the two identifiers are clearly different and the evidence pool contains no actual ambiguity about which article PMC12952596 refers to; the claim follows directly and unambiguously from the evidence.
Expert 2 — The Context Analyst
The main omitted context is that a near-identical but different PMCID (PMC1295259) is a 2005 observational case–control study with 212 adults, which could confuse readers, but that does not change what PMC12952596 itself reports in its Methods (Sources 5–6). With the identifier correctly specified as PMC12952596, the article and its PDF explicitly describe the study as a randomized clinical trial and state that participants were 212 adults, so the claim gives a truthful overall impression (Sources 1, 3, 15; corroborated by PubMed and PLOS ONE in Sources 7 and 10).
Expert 3 — The Source Auditor
High-authority medical databases and journals, including PubMed Central (Source 1, Source 3) and PLOS ONE (Source 10), explicitly confirm that PMCID: PMC12952596 describes the 'Make Better Choices 2' randomized clinical trial with 212 adult participants. The opponent's argument relies on a false equivalence with a completely different 2005 paper (PMC1295259), whereas the correct trial's design and sample size are independently verified by ClinicalTrials.gov (Source 8).