Comparison · NCT00078897-sae
Selenium vs Placebo: serious adverse events
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
2 sourcestrial-comparisons-2026-03-23-0.1.0
Cite this record
ConductScience Library. Selenium vs Placebo: serious adverse events. Trial comparisons, record NCT00078897-sae. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT00078897-sae
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Measures6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note |
|---|---|---|---|---|---|
| Risk in group 1 | 0.333 | 0.299 | 0.369 | wilson | |
| Risk in group 2 | 0.328 | 0.294 | 0.364 | wilson | |
| Risk difference, group 1 minus group 2 | 0.00484 | -0.0448 | 0.0545 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 1.01 | 0.873 | 1.18 | log | |
| Odds ratio, group 1 over group 2 | 1.02 | 0.816 | 1.28 | log | |
| Number needed to harm, for one more participant with a serious adverse event on Selenium than on Placebo | 207 | from the risk difference interval | the interval includes no difference |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: placebo.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Selenium | Participants receive oral selenium 200 mcg once daily.~Selenium: Participants will be randomized either to selenium or placebo, taking the randomized intervention for 3 to 5 years, depending on when their recommended follow up colonoscopy is scheduled. | 228 | 685 | EG000 |
| Group 2 | Placebo | Participants receive oral placebo once daily.~Selenium: Participants will be randomized either to selenium or placebo, taking the randomized intervention for 3 to 5 years, depending on when their recommended follow up colonoscopy is scheduled. | 226 | 689 | EG001 |
Source ClinicalTrials.gov
Harm
- What it counts
- Total, serious adverse events
- Time frame
Source ClinicalTrials.gov
Trial
- Title
- Selenium for Prevention of Adenomatous Colorectal Polyps
- NCT number
- NCT00078897
- Phases
- PHASE3
- Conditions
- Colorectal Cancer, Adenomatous Colorectal Polyps, Precancerous Condition
- Interventions
- Selenium
- Lead sponsor
- University of Arizona
- Results first posted
- 2019-09-24
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT00078897?tab=results
Source ClinicalTrials.gov
Source
- Release
- trial-comparisons-2026-03-23-0.1.0
- Release manifest SHA-256
- f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57
- AACT copy
- 2026-03-23
- 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
Source ClinicalTrials.gov
Sources 2
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.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.govnone 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.
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