Digital Breast Tomosynthesis vs Digital Mammography: Number of Participants With Interval Breast Cancer
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
Measures 6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note | Source |
|---|---|---|---|---|---|---|
| Risk in group 1 | 0.00139 | 0.000901 | 0.00215 | wilson | ClinicalTrials.gov | |
| Risk in group 2 | 0.00202 | 0.00141 | 0.0029 | wilson | ClinicalTrials.gov | |
| Risk difference, group 1 minus group 2 | -0.000627 | -0.00163 | 0.000346 | newcombe hybrid score | ClinicalTrials.gov | |
| Risk ratio, group 1 over group 2 | 0.689 | 0.39 | 1.22 | log | ClinicalTrials.gov | |
| Odds ratio, group 1 over group 2 | 0.689 | 0.389 | 1.22 | log | ClinicalTrials.gov | |
| Number needed to treat, for one fewer participant with the outcome on Digital Breast Tomosynthesis than on Digital Mammography | 1,590 | from the risk difference interval | the interval includes no difference | ClinicalTrials.gov |
Groups 2
Neither group, or both, names a comparator, so the groups keep ClinicalTrials.gov's order.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code | Source |
|---|---|---|---|---|---|---|
| Group 1 | Digital Breast Tomosynthesis | Digital Breast Tomosynthesis + Synthetic Mammography (DBT)~The DBT was independently read by two radiologists. A consensus meeting decided whether to recall the woman or not.~Women selected for further assessment (positive screening exam) was recalled.~Digital Breast Tomosynthesis + Synthetic Mammography: Two-view tomosynthesis performed with GE SenoClaire 3D Breast Tomosynthesis. | 20 | 14,380 | OG000 | ClinicalTrials.gov |
| Group 2 | Digital Mammography | The digital mammograms was independently read by two radiologists. A consensus meeting decided whether to recall the woman or not.~Women selected for further assessment (positive screening exam) was recalled.~Digital mammography: Two-view digital mammography performed with GE SenoClaire 3D Breast Tomosynthesis. | 29 | 14,369 | OG001 | ClinicalTrials.gov |
Outcome 5
| Field | Value | Source |
|---|---|---|
| Type | SECONDARY | ClinicalTrials.gov |
| Title | Number of Participants With Interval Breast Cancer | ClinicalTrials.gov |
| Description | Rate of interval breast cancer among those screened with tomosynthesis versus digital mammography as performed in a population based screening program. | ClinicalTrials.gov |
| Time frame | 60 months from start up of the trial | ClinicalTrials.gov |
| Population | ClinicalTrials.gov |
Trial 8
| Field | Value | Source |
|---|---|---|
| Title | The Digital Breast Tomosynthesis Trial in Bergen | ClinicalTrials.gov |
| NCT number | NCT02835625 | ClinicalTrials.gov |
| Phases | NA | ClinicalTrials.gov |
| Conditions | Breast Neoplasms | ClinicalTrials.gov |
| Interventions | Synthetic Mammography + Digital Breast Tomosynthesis, Digital mammography | ClinicalTrials.gov |
| Lead sponsor | Norwegian Institute of Public Health | ClinicalTrials.gov |
| Results first posted | 2021-01-15 | ClinicalTrials.gov |
| Results on ClinicalTrials.gov | https://clinicaltrials.gov/study/NCT02835625?tab=results | ClinicalTrials.gov |
Source 4
| Field | Value | Source |
|---|---|---|
| Release | trial-comparisons-2026-03-23-0.1.0 | ClinicalTrials.gov |
| Release manifest SHA-256 | f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57 | ClinicalTrials.gov |
| AACT copy | 2026-03-23 | ClinicalTrials.gov |
| Tables read | outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet | ClinicalTrials.gov |
Release trial-comparisons-2026-03-23-0.1.0
ClinicalTrials.gov's posted results, through CTTI's AACT: ClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299 ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.
ClinicalTrials.gov: none stated ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.