This page provides an independent statistical analysis and educational interpretation of publicly reported results. ClinicalTrials.gov provides the official trial registry record. Numerical trial results on this page are restricted to the results posted in the ClinicalTrials.gov record; calculations added by Clinical Biostats are labelled as such.
1. Trial at a Glance
This page covers the registry results for MGC Health COVID-19 & Flu A+B Home Multi Test Usability Study (NCT05732610), a non-randomized na study. The primary outcome is Usability of Quick Reference Instructions (QRI) - Critical Steps.
| Feature | Registry value |
|---|---|
| ClinicalTrials.gov identifier | NCT05732610 |
| Phase | NA |
| Condition | COVID-19, Influenza A, Influenza B |
| Allocation | Non-Randomized |
| Design model | Parallel |
| Masking | None (open label) |
| Enrollment | 34 |
| Arms in the primary outcome | n/a |
| Lead sponsor | Medical Group Care, LLC |
| Results posted | Yes |
2. Clinical Question
Population
The study enrolled 34 participants for a home-use usability evaluation. The registry describes intended use for individuals ages 14 and older and for individuals ages 2 to 13. For those under 14, an adult lay-user collects the sample. The record does not report the number enrolled in each age group or give further participant characteristics.
Intervention
The intervention was the MGC Health COVID-19 & Flu A+B Home Multi Test, a diagnostic test intended for non-prescription home use. The record lists an intervention for individuals ages 14 and older and a version for ages 2 to 13. The intended sample is a self-collected direct anterior nares swab; for a subject under 14, an adult lay-user collects it.
Comparator
The study is listed as parallel and non-randomized, with no masking. Its arm descriptions correspond to the two age-based use contexts, but the record does not describe a randomized or like-for-like control comparison. It therefore should not be interpreted as a controlled comparison of test performance between equivalent groups.
Primary question
The primary outcome concerns usability of the Quick Reference Instructions (QRI), assessed by an observer during a one-hour timeframe. An observation form recorded whether the subject or adult lay-user completed each critical task and whether each task was performed correctly. The registry record does not report the observed results for those tasks, so it does not establish how often critical steps were completed correctly.
3. Trial Design
The registry record describes a completed, parallel, non-randomized study with no masking. It lists an enrollment of 34 and identifies the study as a usability evaluation of the MGC Health COVID-19 & Flu A+B Home Multi Test for home use. The listed conditions are COVID-19, Influenza A, and Influenza B. The record gives a start date of 2023-02-14 and a primary completion date of 2023-02-28.
The intervention descriptions distinguish individuals ages 14 and older from individuals ages 2 to 13. Both descriptions concern non-prescription home use and direct anterior nares swab samples. For individuals under 14, an adult lay-user collects the sample. These age-based instructions describe intended use, but the registry record does not state how participants were distributed between the age groups or report age-group-specific outcome results.
The primary outcome is observer assessment of critical steps in the Quick Reference Instructions. The observer used an observation form to assess whether the subject or adult lay-user completed each critical task and whether it was performed correctly. The outcome timeframe is one hour. The record lists four outcome measures overall, but does not report the primary outcome results or identify the other measures in the registry record for this analysis.
Because allocation was non-randomized, the arm descriptions do not create a like-for-like control comparison. Any difference between age-based groups could reflect differences in participants, task roles, or use context rather than an intervention effect. The registry record does not report a statistical analysis plan, sample-size justification, interim analyses, or the allocation counts by group. Those design details should not be inferred from the enrollment figure or the outcome description.
4. Participant Flow and Accounting
The registry reports how participants moved through each stage of the study. All counts below are exactly as posted; missing counts are not inferred from other stages.
Overall Study
| Stage | Individuals - Ages 14 and Older | Individuals - Ages 2 to 13 |
|---|---|---|
| STARTED | 19 | 15 |
| COMPLETED | 19 | 15 |
| NOT COMPLETED | 0 | 0 |
5. Baseline Characteristics
The table reproduces the baseline characteristics posted in the registry, which describe the participants analysed at baseline and help show whether the randomized groups were comparable.
| Characteristic | Unit | Usability Data Set |
|---|---|---|
| Participants analysed | 34 | |
| Age, Customized: < 14 years | Participants | 15 |
| Age, Customized: ≥ 14 years | Participants | 19 |
| Sex: Female, Male: Female | Participants | 16 |
| Sex: Female, Male: Male | Participants | 18 |
| Ethnicity (NIH/OMB): Hispanic or Latino | Participants | 30 |
| Ethnicity (NIH/OMB): Not Hispanic or Latino | Participants | 4 |
| Ethnicity (NIH/OMB): Unknown or Not Reported | Participants | 0 |
| Race (NIH/OMB): American Indian or Alaska Native | Participants | 0 |
| Race (NIH/OMB): Asian | Participants | 0 |
| Race (NIH/OMB): Native Hawaiian or Other Pacific Islander | Participants | 0 |
| Race (NIH/OMB): Black or African American | Participants | 2 |
| Race (NIH/OMB): White | Participants | 32 |
| Race (NIH/OMB): More than one race | Participants | 0 |
| Race (NIH/OMB): Unknown or Not Reported | Participants | 0 |
| Region of Enrollment: United States | participants | 34 |
| Education: Pre-high school | Participants | 20 |
| Education: High school graduate | Participants | 6 |
| Education: Some college | Participants | 5 |
| Education: College graduate | Participants | 3 |
6. Primary Endpoint
The registry lists the primary outcome as Usability of Quick Reference Instructions (QRI) - Critical Steps, measured over 1 hour.
| Element | Registry entry |
|---|---|
| Result type | Number |
| Measure of spread | not applicable |
| Unit | participants |
| Endpoint classification | Binary Endpoint |
The primary endpoint is titled “Usability of Quick Reference Instructions (QRI) - Critical Steps.” It is a count-type measure expressed in participants, with a one-hour timeframe. According to the registry description, an observer completed an observation form for each subject and assessed whether the subject or adult lay-user completed each critical task and whether the task was performed correctly.
Usability assessment addresses whether people can follow instructions and perform specified tasks in the intended use context. That is a different question from whether a diagnostic test correctly identifies a condition. The listed conditions and diagnostic-test interventions do not make the primary usability endpoint a measure of diagnostic accuracy. The endpoint as described focuses on task completion and correctness during use of the Quick Reference Instructions.
Observer assessment can make task performance more structured than relying only on a participant’s later recollection. At the same time, interpretation depends on how critical tasks were defined, what counted as correct performance, and how observations were recorded. Those operational details are not reported in the registry record.
The registry record does not provide the number of participants completing critical steps correctly, the number with an observed error, or a group-specific result. It also does not report an effect estimate or uncertainty interval for this endpoint. As a result, the outcome definition can be described, but the observed usability findings cannot be quantified from the registry record.
7. Why No Re-analysis Is Shown
8. Statistical Interpretation
The central interpretive point is that the registry record defines a primary usability outcome but does not report its observed result. The outcome concerns observer-assessed completion and correctness of critical Quick Reference Instructions tasks during a one-hour timeframe. Without participant counts for successful or incorrect task performance, there is no basis in the record for describing the frequency of correct completion or comparing that frequency between the age-based use contexts.
The study is listed as non-randomized, parallel, and unmasked. The two intervention descriptions reflect use for individuals ages 14 and older and for individuals ages 2 to 13, including adult lay-user sample collection for subjects under 14. These are distinct use contexts, not randomized treatment assignments. The record itself cautions that the arms are not a like-for-like control comparison. Even if group-level values were available, differences would need to be interpreted with that design limitation in mind.
The enrollment figure is 34, but enrollment alone does not indicate how many participants contributed evaluable observations, whether all critical tasks were observed, or how missing observations were handled. Those details are not reported in the registry record. No analysis results are listed. Accordingly, the enrollment count should not be treated as the endpoint denominator.
The record lists four outcome measures, while the primary measure is the one described in detail in the registry record. The other measures, their results, and any analyses are not reported in the registry record. There are no reported estimates, confidence intervals, or hypothesis-test results from which to assess precision or statistical evidence.
The safety listing records zero serious adverse events and zero deaths in the usability data set, with 34 at risk for each of those entries. This describes the registry’s reported serious-event figures; it does not supply results for non-serious events or establish that no other events occurred. It also does not replace the missing primary usability results.
Overall, the record supports a description of the study’s purpose, intended use contexts, endpoint definition, and listed serious-event counts. It does not support a numerical conclusion about how often critical instructions were followed correctly, whether performance differed by age-based use context, or the precision of any such difference.
9. Statistical Methods Explained
The registry describes a binary-type outcome whose meaning is participants with an event, expressed as counts. The primary endpoint description, however, explains that an observer assessed completion of critical tasks and whether each task was performed correctly. Those are related but not interchangeable descriptions: a count requires a clear definition of what constitutes the event and what participant-level rule converts task observations into a participant-level result. That rule is not reported in the registry record.
What does a count measure?
In general, a count states how many observations meet a defined condition. For a participant-level count, the condition must be clear: for example, whether the event means completing every critical task correctly, completing a specified task correctly, or having any task error. These alternatives can yield different counts from the same set of observations. The registry record names critical steps and describes observation of task completion and correctness, but does not report the participant-level event definition or the task-level scoring rule.
Counts are useful because they preserve the number of participants meeting the stated condition. They do not, on their own, convey the uncertainty around a result or explain what happened among participants who did not meet the condition. Interpretation also depends on the denominator: the number assessed for the endpoint may differ from enrollment if some observations are incomplete. Endpoint-specific denominators are not reported in the registry record.
Why does the study design matter?
Random allocation, when used, can help make groups comparable in expectation by distributing known and unknown participant characteristics across study arms. This study is identified as non-randomized, and its arm descriptions concern age-based intended use. The registry record cautions that the arms are not a like-for-like control comparison. Thus, a difference between groups, if results were available, could reflect differences in who performed the task or the context in which it was performed. It would not automatically identify a causal effect of one test version or instruction approach.
No masking is listed. In general, observer assessments can be influenced by expectations if the observer knows the participant’s group or study purpose. Standardized task definitions and consistent recording can reduce some sources of variation, but the record does not report observer training, blinding procedures, or how disagreement between observers was handled. These are methodological considerations, not evidence that a particular bias occurred.
What would an uncertainty interval tell a reader?
In general, a confidence interval gives a range of values compatible with the data and the method used to calculate it. A narrower interval indicates greater precision under that method; a wider interval indicates greater uncertainty. Its interpretation depends on the endpoint definition, observed result, denominator, and analysis model. The registry record does not report an endpoint estimate or confidence interval for the primary usability outcome, so its precision cannot be assessed from the record.
A hypothesis test is another way to compare data with a specified null hypothesis under a statistical model. A p-value does not measure the size or practical importance of an effect, and it cannot repair a weak or mismatched comparison. No primary-outcome test result or statistical analysis is reported in the registry record. The absence of a reported test does not establish that groups were equal; it means that the registry record does not provide the inferential result.
How should planning illustrations be read?
The stated sample-size assumptions describe a planning illustration based on an observed effect, not the study’s own design. The assumptions specify a two-sided significance level of 0.05, equal allocation between two arms, and a normal approximation; the effect to detect is described as a stated fraction of the observed effect. Such calculations are hypothetical planning aids. They are not observed outcomes, and they are not observed power. The record does not provide the primary effect estimate needed to interpret numerical planning values, nor does it report the study’s own sample-size justification.
In general, a planning sample size depends on the effect chosen for detection, the statistical test, the allocation scheme, and the desired operating characteristics. Changing those assumptions changes the illustration. A planning result should not be read as evidence that a completed study had adequate precision, particularly when the endpoint result and analysis are not reported. No sample-size illustration can substitute for observed participant counts and an analysis of the primary endpoint.
The record does not report a model for adjustment, a method for handling clustering or repeated observations, or a prespecified approach to missing values. These details could matter if participants contributed multiple task observations or if the analysis combined tasks into one participant-level outcome. General statistical methods explain why such choices matter, but the registry record does not show which choices were made.
10. Multiplicity, Missing Data and Analysis Populations
The registry record lists four outcome measures, but does not report the details or results for the other measures in the registry record for this analysis. It lists no analyses. A prespecified statistical plan, including how outcomes were prioritized or analyzed, is not reported in the registry record.
Multiplicity arises when several outcomes, groups, or statistical comparisons are examined. In general, testing many hypotheses can increase the chance of finding at least one apparently unusual result by chance. Researchers may address this through a prespecified hierarchy, adjustment procedures, or a clear separation between primary and exploratory analyses. The registry record does not report whether any such approach was planned or used. No multiplicity correction should therefore be assumed.
The record does not state how missing or incomplete observations were handled, whether any participants lacked an endpoint assessment, or which analysis population was used. Enrollment is reported as 34, but an enrollment figure does not establish how many participants had evaluable observations for the primary endpoint. The endpoint denominator and missing-data procedures are not reported in the registry record.
In general, missing observations can affect interpretation when the probability of missingness is related to task performance or participant characteristics. Complete-case analysis, imputation, and other methods make different assumptions, and their suitability depends on why data are missing and what information was collected. No particular method or assumption can be attributed to this study from the registry record. Consequently, the available record does not allow assessment of the effect of missing data or of how the primary analysis population was defined.
11. Safety Results
The registry reports serious adverse events as affected participants divided by participants at risk.
| Arm | Participants with serious adverse events | Participants at risk | Percentage |
|---|---|---|---|
| Usability Data Set | 0 | 34 | 0.0% |
Deaths
| Arm | Deaths (participants affected of at risk) |
|---|---|
| Usability Data Set | 0 of 34 |
Other (non-serious) adverse events
Participants with at least one non-serious event at or above the registry's 0% reporting threshold.
| Arm | Participants affected of at risk |
|---|---|
| Usability Data Set | 0 of 34 |
The registry’s usability data set lists 34 participants at risk for serious adverse events and records zero serious adverse events. It also lists 34 at risk for deaths and records zero deaths. These are the serious-event figures in the registry record for this data set.
In general, a zero count means that no event of the specified type was recorded in the listed group during the reported accounting. It does not mean that the underlying risk is known to be zero. A small or limited data set can provide little information about uncommon events, and interpretation depends on the observation period and how events were collected. The record does not describe the safety observation period or event-collection procedures beyond the listed figures.
The serious-event entries should not be read as a complete summary of every possible adverse event. Non-serious adverse events are not reported in the registry record, and the listed counts do not describe test usability, diagnostic accuracy, or critical-task performance. The record also does not provide a comparison with a control group. These safety figures are descriptive rather than evidence of comparative safety.
12. What the Result Does, and Does Not, Mean
The registry record establishes that this was a completed usability study of the MGC Health COVID-19 & Flu A+B Home Multi Test, intended for non-prescription home use. The listed use contexts are individuals ages 14 and older and individuals ages 2 to 13; for subjects under 14, an adult lay-user collects the sample. The primary question concerns whether a subject or adult lay-user completed critical instruction tasks and performed them correctly, as assessed by an observer during a one-hour timeframe.
That endpoint is relevant to understanding how instructions are used, but it is not a direct measure of diagnostic accuracy. The record does not report the number of participants who correctly completed the critical tasks, the number with errors, or any group-specific endpoint result. Therefore, it does not permit a quantitative statement about observed usability or a comparison between the age-based use contexts.
The non-randomized design also limits causal interpretation. The listed groups are not described as equivalent control arms, and the record cautions against treating them as a like-for-like comparison. If group results were available, differences could be associated with age, who collected the sample, or other group characteristics. The registry record does not report information that would separate those possibilities.
The serious adverse event listing records zero serious events and zero deaths in the usability data set. It does not report non-serious events or provide a comparative safety analysis. The record also does not provide the statistical analysis, endpoint-specific denominator, missing-data handling, confidence interval, or hypothesis test needed to assess the precision of the primary finding.
Accordingly, the registry record describes the study question and some design and safety information, but it does not establish a numerical usability result, a diagnostic performance result, or a causal comparison. A missing result should not be interpreted as either success or failure of the test or instructions.
13. Why This Trial Matters Statistically
Usability is a distinct statistical and practical question from diagnostic accuracy. A home test can involve a sequence of instructions and actions, including sample collection, and observer assessment of critical steps focuses on whether those tasks were completed as intended. A clearly defined usability endpoint can help identify how a test is used in its intended setting. The registry record’s primary outcome is framed around task completion and correctness rather than a diagnostic result.
The study also illustrates why the unit and definition of an endpoint matter. The observer recorded task-level information, while the endpoint is described as participants with an event. To interpret a count, readers need to know how multiple task observations translate into a participant-level event and what denominator was analyzed. The registry record does not report those details or the resulting counts.
Age-based intended use can involve different task roles: the record specifies that an adult lay-user collects the sample for subjects under 14. That distinction is relevant when interpreting usability observations. Because the study is non-randomized and the arms are not a like-for-like control comparison, the design does not support attributing a difference between groups to a test version alone.
Finally, the record demonstrates the difference between a study being marked completed and results being available for interpretation. Enrollment, endpoint definitions, and serious-event counts provide useful context, but they do not replace the primary outcome estimate, its denominator, and an account of uncertainty. Those primary results are not reported in the registry record.
14. Limitations
- The posted summary statistics are the only data these results rest on; patient-level data, full protocols and statistical analysis plans are not available.
- Recalculated results are simple, unadjusted calculations from posted summaries. They do not replace the sponsor's prespecified analysis.
The most consequential limitation for interpreting this study is that the registry record does not report the primary usability results. It describes observer assessment of critical tasks, but gives no participant counts for correct completion, task errors, or endpoint-specific denominators. Without those results, neither the observed level of usability nor its precision can be assessed.
The record does not explain how task-level observations were combined into a participant-level event, what counted as correct performance, or how critical steps were defined. It does not report observer training, consistency checks, or handling of disagreements. These missing details limit reproducibility and make it difficult to judge how consistently the endpoint could have been assessed.
The study is non-randomized and has no masking. Its age-based use contexts differ in whether the subject or an adult lay-user performs sample collection. The record cautions that the arms are not a like-for-like control comparison, and it does not provide group allocation counts or group-specific results. Any direct comparison between the groups would therefore require information not reported in the registry record.
The record does not report participant characteristics, endpoint-specific missingness, the analysis population, or the method used to handle incomplete observations. It also does not report the statistical analysis plan, sample-size justification, or results for the other outcome measures. The listed enrollment of 34 cannot resolve these uncertainties or establish the number contributing to each analysis.
The safety information is limited to the recorded serious adverse event and death counts. Non-serious event information and further event-collection details are not reported in the registry record. These limitations do not show that a particular problem occurred; they define what cannot be concluded from the record.
15. Related Tutorials
16. Related Statistical Calculators
17. Sources
- ClinicalTrials.gov: MGC Health COVID-19 & Flu A+B Home Multi Test Usability Study — NCT05732610.
- Registry record last updated 2024-05-02; status last verified 2024-04.
- Results first posted 2024-05-02.
- Data retrieved from ClinicalTrials.gov on 2026-11-09.
- Group sizes, means, event counts and sponsor-reported p-values are reproduced as posted. Effect estimates, confidence intervals and p-values not attributed to the sponsor are independently calculated from the posted summary statistics.
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18. Record Summary
The registry record describes a completed, non-randomized, parallel, unmasked usability study of the MGC Health COVID-19 & Flu A+B Home Multi Test, with enrollment of 34. It lists intended home use for individuals ages 14 and older and ages 2 to 13, with adult lay-user sample collection for subjects under 14.
The primary outcome concerns observer assessment of whether critical Quick Reference Instructions tasks were completed and performed correctly within a one-hour timeframe. The primary outcome results, endpoint denominator, analysis population, missing-data approach, and statistical analysis are not reported in the registry record. The record lists four outcome measures, but other outcome details are not reported in the registry entries analyzed.
The usability data set lists zero serious adverse events and zero deaths, with 34 at risk for each entry. These are descriptive registry counts and do not provide a comparative safety assessment.