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 Innovations in Clinical Care of CE Approved Nucleus Cochlear Implant Recipients (NCT05270876), a na na study. The primary outcome is Mean Difference Between Standard and Novel Fitting Method for Monosyllabic Word Scores in Quiet.
| Feature | Registry value |
|---|---|
| ClinicalTrials.gov identifier | NCT05270876 |
| Phase | NA |
| Condition | Hearing Loss |
| Allocation | Not applicable (single group) |
| Design model | Single Group |
| Masking | None (open label) |
| Enrollment | 20 |
| Arms in the primary outcome | n/a |
| Lead sponsor | Cochlear |
| Results posted | Yes |
2. Clinical Question
The registry describes an umbrella investigation of approaches to cochlear implant fitting and diagnostics in adult and paediatric recipients of CE approved Nucleus cochlear implants. Its primary outcome concerns the difference in mean monosyllabic word scores in quiet between standard and novel fitting methods. The score is expressed as the percentage of correct answers, and the outcome timeframe is 0 to 4 weeks after fitting.
The intended comparison is within a single study cohort: recipients received both methods at different timepoints. This differs from a comparison between independently assigned treatment groups. The registry record does not report the observed mean difference, its 95% confidence interval, or the underlying scores, so the direction and size of the recorded primary result cannot be described.
Population
Adult and paediatric recipients of CE approved Nucleus cochlear implants; the primary outcome population is all study recipients who received both fitting methods.
Intervention
A novel fitting method, within an investigation of device fitting approaches and diagnostic or measurement techniques.
Comparator
The standard fitting method, received by the same study cohort at a different timepoint.
Primary question
What is the mean difference in monosyllabic CNC word scores in quiet, reported as percentage correct, between the standard and novel fitting methods?
The umbrella study could evaluate features in separate sub-studies and in laboratory or real-world settings. The registry summary says each sub-study was expected to include approximately 20 subjects on average. It does not identify which specific fitting feature generated the primary outcome, or provide further details linking that outcome to a particular sub-study.
3. Trial Design
This was a prospective, repeated-measures investigation, recorded as a single-group study with no masking. The registry describes an interrupted time series in which recipients received standard and novel fitting methods at different timepoints. Thus, the primary comparison is based on measurements associated with both methods in the same cohort, not on a randomized comparison between separate arms.
The registered enrollment was 20. The study summary describes an umbrella investigation in which each feature would be tested in a sub-study specific to a hearing-care model; each sub-study was expected to include approximately 20 subjects on average. These statements do not establish how many participants contributed to the primary outcome or to any particular sub-study. That information is not reported in the registry record.
The intervention is broadly described as a cochlear implant and sound-processor device fitting paradigm or a diagnostic or measurement technique. The primary outcome specifically concerns standard versus novel fitting methods and monosyllabic word scores in quiet. The registry does not specify which novel fitting approach was assessed for that outcome, how fitting order was determined, or the spacing between the two fitting timepoints.
The study status is completed. The recorded start date is 2020-10-19, and the primary completion date is 2023-03-06. The registry lists Hearing Loss as a condition and Cochlear as the sponsor. The allocation field is NA, consistent with the record’s description of a single-group investigation rather than a randomized allocation to competing groups. No masking was recorded.
The repeated-measures design can compare observations from the same recipients, but the registry record does not describe the statistical procedure used to account for within-person dependence or time trends. It also does not report a protocol-level rationale for enrollment, details of sequence control, or any interim analysis plan. These omissions limit reconstruction of the design and analysis beyond the broad registry 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 | Study Cohort |
|---|---|
| STARTED | 20 |
| COMPLETED | 20 |
| NOT COMPLETED | 0 |
Analysis population for the primary outcome, as defined in the registry: All study recipients received the standard and novel fitting methods at different timepoints of the study.
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 | Study Cohort |
|---|---|---|
| Participants analysed | 20 | |
| Age, Continuous | years | 66.5 (26 to 81) |
| Sex: Female, Male: Female | Participants | 8 |
| Sex: Female, Male: Male | Participants | 12 |
| Race and Ethnicity Not Collected | Participants | — |
| Average period of CI experience | years | 5.3 (0.25 to 13) |
| Device type: CI532 | Participants | 11 |
| Device type: CI632 | Participants | 3 |
| Device type: CI512 | Participants | 3 |
| Device type: CI612 | Participants | 1 |
| Device type: CI24RE(CS) | Participants | 1 |
| Device type: CI24RE(CA) | Participants | 1 |
6. Primary Endpoint
The registry lists the primary outcome as Mean Difference Between Standard and Novel Fitting Method for Monosyllabic Word Scores in Quiet, measured over 0 to 4 weeks after fitting.
| Element | Registry entry |
|---|---|
| Result type | Mean |
| Measure of spread | 95% Confidence Interval |
| Unit | difference in percentage correct answers |
| Endpoint classification | Continuous Endpoint |
The primary endpoint is the mean difference between standard and novel fitting methods in monosyllabic CNC word scores in quiet. Scores are reported as the percentage of correct answers, and the measure is a continuous outcome. The listed timeframe is 0 to 4 weeks after fitting. The registry description says all study recipients received both fitting methods at different timepoints.
A word-recognition score provides a measure of performance on a defined listening task. Comparing mean scores can describe the average difference associated with the two fitting methods in the observed study cohort. Because the same recipients contribute measurements under both methods, the contrast is naturally interpreted as a within-person comparison, provided measurements are available for both methods and the analysis accounts appropriately for their dependence. The registry record does not specify the actual analysis procedure.
The registered summary measure is a mean difference with a 95% confidence interval. In general, a confidence interval conveys the range of effect estimates reasonably compatible with the data and the statistical model; it indicates precision, not certainty that the true effect lies in the interval. No numerical mean difference or confidence interval is reported in the registry record, so neither the estimated direction nor its precision can be assessed from the registry outcome entry.
The endpoint is limited to monosyllabic words in quiet over the stated post-fitting timeframe. It should not be treated as a measure of every aspect of hearing, performance in noise, or longer-term outcomes. Those outcomes are not the primary endpoint described in the registry record.
7. Why No Re-analysis Is Shown
8. Statistical Interpretation
The registry identifies a clinically interpretable comparison: mean monosyllabic CNC word scores in quiet under standard and novel fitting methods, expressed as percentage correct. It also identifies a 95% confidence interval as the dispersion measure and states that the participants received the methods at different timepoints. These details define the intended endpoint, but they do not provide its observed result.
The mean difference, confidence limits, and underlying group or paired summary values are not reported in the registry record. Consequently, the posted information does not establish whether the average score was higher under the novel method, higher under the standard method, or similar between methods. It also does not establish the magnitude of any difference or how precisely it was estimated. A numerical result should not be inferred from the endpoint title or from the study status.
The registry lists one outcome measure and no analyses. That does not mean the study necessarily collected no measurements; it means that analysis results are not presented in the registry record. The registry’s primary outcome description is therefore a specification of what was to be measured, rather than a reported estimate of the comparison.
Repeated measurement can be useful because each recipient serves as their own reference, reducing the influence of stable differences between people in a within-person contrast. However, observations from the same person are related, not independent. In general, an analysis should account for that dependence. In an interrupted time-series setting, time and order may also matter: changes between observations could reflect the fitting method, changes over time, or other factors. The registry record does not report how these issues were handled, whether order was controlled, or which covariates were considered.
The absence of a reported estimate also prevents assessment of whether the confidence interval is narrow or wide, whether it includes no difference, or whether the result is compatible with effects of differing practical importance. Statistical significance cannot be determined from the outcome description alone. A confidence interval is particularly informative because it shows uncertainty around the point estimate, but neither is present in the registry result entry.
The posted safety figures are separate from the primary efficacy outcome. They record no serious adverse events among 20 at risk, other adverse events affecting 5 of 20 at risk, and 0 deaths. They do not supply evidence about the comparative word-score endpoint. Nor can these summary safety counts, without further detail about event type, timing, severity, or attribution, establish a causal relationship with a fitting method.
Any sample-size figures based on the observed effect are planning illustrations, not observed power. The registry record does not report the primary effect needed to interpret such illustrations, nor does it report the resulting planning counts. The study’s registered enrollment and its approximate expected sub-study size should not be mistaken for a reported endpoint analysis population.
9. Statistical Methods Explained
The registry describes a continuous primary outcome summarized as a mean difference with a 95% confidence interval. The outcome is the difference in mean CNC scores, expressed as percentage correct, between standard and novel fitting methods. No numerical estimate or interval is reported in the registry record, and the record lists no analyses. The methods below explain the statistical ideas relevant to that specification in general; they do not establish which procedures the investigators used.
What does a mean difference describe?
For a continuous measure, a mean summarizes the central value of observations. A mean difference expresses the contrast between the average score under one condition and the average score under another, using the same outcome scale. In this study, the scale is percentage correct. The sign of a difference depends on the subtraction order, so interpretation requires knowing which method is subtracted from which. The registry names the comparison but does not state the numerical result or its sign.
Here, recipients received both methods at different timepoints. In general, a paired analysis uses each person’s within-person contrast and then summarizes those contrasts. This respects the fact that observations from the same person are related. An analysis that treats repeated observations as independent can misrepresent uncertainty. The registry record does not identify whether a paired method, a repeated-measures model, or another approach was used.
What does a confidence interval add?
A confidence interval places an estimate in the context of its statistical uncertainty. A narrower interval generally indicates greater precision under the assumptions of the analysis; a wider interval indicates less precision. It does not show the range of individual participant scores, and it does not guarantee that the true effect is contained in that particular interval. The registered endpoint specifies a 95% confidence interval, but its limits are not reported in the registry record.
For a mean difference, the interval can help readers judge which values are compatible with the data and model. If an interval includes no difference, that may be relevant to a test of a zero contrast, but interpretation still depends on the design, analysis, and context. Without the estimate and interval, neither precision nor compatibility with particular effects can be evaluated.
Why does the time structure matter?
The design is described as an interrupted time series with methods applied at different timepoints. General repeated-measures reasoning must account for the ordering and timing of measurements. If scores change over time for reasons unrelated to the fitting method, a simple before-and-after contrast may mix a method difference with a time effect. The registry record does not report the sequence, interval between fitting methods, number or timing of measurements, or modeling of time trends.
Likewise, an interrupted time-series analysis may use information about patterns over time, but the registry’s broad design label does not reveal the actual model. The primary timeframe is 0 to 4 weeks after fitting; no further detail is given about measurement timing within that window. It would be inappropriate to assume a particular regression model, baseline adjustment, or treatment-order procedure.
How should planning illustrations be read?
The stated planning assumptions describe illustrations based on an observed effect, with 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 ask how many participants per arm might be needed under those assumptions for a target level of power. They are not results from the enrolled study and are not observed power.
The registry record does not report the observed endpoint effect or the resulting planning counts. The assumptions also describe equal allocation between two arms, whereas the registered study is a single-group repeated-measures investigation. Those planning assumptions should therefore be treated as illustrations rather than a description of the trial’s actual design or analysis. The registry does not report the original sample-size justification or its own power calculation.
What can be concluded from the listed analysis status?
The record lists one outcome measure and no analyses. The outcome definition establishes the intended measure, not a reported statistical result. Without estimates, confidence limits, analysis populations, and a description of the model, readers cannot verify how the endpoint was analyzed or assess its statistical uncertainty. The appropriate interpretation is that the primary comparison is specified, while its numerical result and analysis details are not reported in the registry record.
10. Multiplicity, Missing Data and Analysis Populations
The investigation is described as an umbrella study in which features would be evaluated in sub-studies specific to a hearing-care model. The registry summary says each sub-study was expected to include approximately 20 subjects on average. It lists one primary outcome measure, but does not give a multiplicity strategy for the broader set of features, sub-studies, or possible outcomes. Whether statistical testing was adjusted for multiple comparisons is not reported in the registry record.
Multiplicity is a general concern when many hypotheses are examined: the chance of at least one apparently unusual result can increase as the number of comparisons grows. A prespecified hierarchy, adjustment procedure, or clear distinction between primary and exploratory analyses can help readers interpret a family of results. The registry record does not describe such procedures. The presence of one listed outcome does not establish that only one analysis or comparison was considered across the umbrella investigation.
Missing-data handling is also not reported in the registry record. The registry does not state how many recipients contributed scores under each method, whether every recipient had measurements at both timepoints, how missing scores were handled, or whether any sensitivity analysis was planned. These details matter for a repeated-measures comparison because incomplete paired observations can affect both the analysis population and the precision of an estimate.
The analysis population is described as all study recipients who received the standard and novel fitting methods at different timepoints. The registry does not provide a participant flow or a count of recipients included in the primary endpoint analysis. It also does not state whether the analysis used all enrolled participants, only those with complete measurements, or another defined population. Therefore, the registered population description should not be treated as confirmation of the number analyzed.
The statistical plan, including any interim analyses, is not reported in the registry record. Neither the presence nor absence of interim monitoring should be inferred from that omission.
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 |
|---|---|---|---|
| Study Cohort | 0 | 20 | 0.0% |
Deaths
| Arm | Deaths (participants affected of at risk) |
|---|---|
| Study Cohort | 0 of 20 |
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 |
|---|---|
| Study Cohort | 5 of 20 |
Most frequent non-serious adverse event terms
| Event term | Organ system | Study Cohort |
|---|---|---|
| Discomfort | General disorders | 3 of 20 |
| Headache | General disorders | 2 of 20 |
| Dizziness | General disorders | 2 of 20 |
The registry reports serious adverse event figures for the Study Cohort: 20 were at risk, and 0 were affected by serious adverse events. It reports 20 at risk for other adverse events, with 5 affected. The deaths figure is 0. No serious adverse event terms are listed.
These are counts of affected participants as recorded in the registry, not a description of the number, nature, timing, or duration of every event. The record does not provide event-level details or explain how events were attributed to a fitting method. It also does not present separate safety groups for standard and novel fitting methods, so these figures should not be read as a head-to-head safety comparison.
The difference between the serious and other adverse-event categories is a reporting classification; the registry record does not provide additional definitions in the information available. A zero in the serious adverse-event or death field means no affected participants or deaths are recorded in that field, not that the study establishes the absence of risk. The figures are descriptive and should be interpreted in light of the study’s size, follow-up, event ascertainment, and reporting details, which are not fully described in the registry record.
12. What the Result Does, and Does Not, Mean
The record defines a focused statistical question: whether mean monosyllabic CNC word scores in quiet differ between standard and novel fitting methods among recipients who received both at different timepoints. It specifies the score scale, the 0 to 4 weeks after fitting timeframe, and a mean difference with a 95% confidence interval as the intended summary. These details make the planned endpoint understandable.
However, the registry does not report the numerical mean difference, the confidence interval, or an analysis. The posted data therefore do not establish the direction or size of the primary comparison, its precision, or whether any observed difference would be compatible with no difference. A completed study status does not substitute for results. Without the endpoint estimate, it is not possible to characterize the primary outcome as favoring either fitting method.
The design also shapes what a result could mean. Because the same cohort received both fitting methods at different timepoints, a contrast may benefit from within-person comparison. But the measurements are related, and timing or order could affect scores. The registry does not report enough detail to determine how the analysis accounted for those features. The stated endpoint is limited to monosyllabic word performance in quiet over the registered timeframe; it does not by itself answer broader questions about other listening settings, longer-term outcomes, or every feature included in the umbrella investigation.
The safety counts are descriptive registry entries, not evidence that one fitting method is safer than the other. The record lists 0 participants affected by serious adverse events, 5 affected by other adverse events, and 0 deaths, but does not provide event details or method-specific attribution.
Overall, the registry supports a description of the study question and design, but not a conclusion about the primary outcome’s magnitude, precision, or clinical importance. Those judgments require reported results and sufficient information about the analysis and participants included.
13. Why This Trial Matters Statistically
This trial matters statistically because its primary comparison is repeated within a single cohort rather than randomized between separate groups. That structure can make each participant’s measurements informative about their own contrast, but it also requires appropriate treatment of within-person dependence. A mean difference and confidence interval are useful summaries only when the analysis reflects the way the observations were collected.
The interrupted time-series description adds a further interpretive issue: method and time may be entangled if measurements occur in sequence. A score change after a fitting change is not automatically attributable to the fitting method. Sequence, measurement timing, and any time trend can influence the contrast. The registry record does not describe how these design features were addressed statistically.
The outcome is clearly defined as monosyllabic word scores in quiet, expressed as percentage correct, with a specified post-fitting timeframe. That specificity helps distinguish the endpoint from more general claims about hearing or performance. At the same time, the umbrella design covers fitting and diagnostic approaches across sub-studies, so the exact feature assessed by this primary comparison is important context that is not reported in the registry record.
Finally, the gap between a registered endpoint and a reported result is consequential. The registry states the intended measure but provides no estimate, confidence interval, or analysis. Readers therefore cannot judge effect size or precision. The planning assumptions are not a substitute: sample-size illustrations based on an observed effect are planning tools, not observed power or trial findings. Transparent reporting of estimates, uncertainty, analysis populations, and missing-data handling is needed to support statistical interpretation.
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 principal limitation for interpreting this record is that it does not report the primary outcome estimate or its 95% confidence interval. The registry lists no analyses, leaving the direction, magnitude, and precision of the primary comparison unknown. The outcome definition alone cannot establish what the observed data showed.
The study is a single-group repeated-measures investigation with no masking and no randomized allocation. Recipients received both methods at different timepoints, but the registry does not report the fitting sequence, whether order was controlled, or the interval between methods. Because time and method may vary together, the record does not allow assessment of possible time-related or order-related influences.
The umbrella study description spans adult and paediatric recipients and multiple possible fitting or diagnostic features. The registry does not identify the specific feature associated with the primary endpoint or state how the primary endpoint population relates to the separate sub-studies. Although registered enrollment is 20 and the summary gives an expected average of approximately 20 subjects per sub-study, the number included in the primary analysis is not reported in the registry record.
There is no reported account of missing outcome data, analysis-set definitions, model specification, covariate adjustment, multiplicity control, or interim analyses. These omissions prevent evaluation of whether the analysis matches the repeated-measures design and how robust the result might be to incomplete observations or alternative assumptions.
The safety information is also limited to aggregate affected-participant counts and does not include event descriptions or attribution by fitting method. These limitations concern what can be learned from the registry record; they do not establish that the unreported procedures or analyses were not performed.
15. Related Tutorials
16. Related Statistical Calculators
17. Sources
- ClinicalTrials.gov: Innovations in Clinical Care of CE Approved Nucleus Cochlear Implant Recipients — NCT05270876.
- Registry record last updated 2025-03-10; status last verified 2024-12.
- Results first posted 2024-12-05.
- 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
NCT05270876 is a completed, prospective, repeated-measures, single-group investigation sponsored by Cochlear. The registry lists Hearing Loss as a condition and describes an umbrella study of fitting and diagnostic approaches in adult and paediatric recipients of CE approved Nucleus cochlear implants. Registered enrollment is 20; each sub-study was expected to include approximately 20 subjects on average.
The primary outcome is the mean difference in monosyllabic CNC word scores in quiet between standard and novel fitting methods, reported as percentage correct, with a 95% confidence interval over 0 to 4 weeks after fitting. The registry states that recipients received both methods at different timepoints, but reports no numerical outcome estimate and lists no analyses.
The record reports 0 participants affected by serious adverse events, 5 affected by other adverse events, and 0 deaths. The start date is 2020-10-19, the primary completion date is 2023-03-06, and the status is completed. The registry record does not report the primary analysis details, analysis population count, or missing-data approach.