Comparison · NCT01573754-sae
Hydroxychloroquine vs Phlebotomy: 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. Hydroxychloroquine vs Phlebotomy: serious adverse events. Trial comparisons, record NCT01573754-sae. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT01573754-sae
On this page
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 | 0.308 | 0.127 | 0.576 | wilson | |
| Risk in group 2 | 0 | 0 | 0.184 | wilson | |
| Risk difference, group 1 minus group 2 | 0.308 | 0.0494 | 0.576 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | log | a group has no participants with the outcome | |||
| Odds ratio, group 1 over group 2 | log | a cell of the two-by-two table is zero | |||
| Number needed to harm, for one more participant with a serious adverse event on Hydroxychloroquine than on Phlebotomy | 3.25 | 1.74 | 20.2 | from the risk difference interval |
Source ClinicalTrials.gov
Groups2
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 |
|---|---|---|---|---|---|
| Group 1 | Hydroxychloroquine | Hydroxychloroquine: 100 mg by mouth twice weekly | 4 | 13 | EG000 |
| Group 2 | Phlebotomy | Phlebotomy: 450 mL every 2 weeks | 0 | 17 | EG001 |
Source ClinicalTrials.gov
Harm
- What it counts
- Total, serious adverse events
- Time frame
- Up to 27 months
Source ClinicalTrials.gov
Trial
- Title
- Hydroxychloroquine and Phlebotomy for Treating Porphyria Cutanea Tarda
- NCT number
- NCT01573754
- Phases
- PHASE2
- Conditions
- Porphyria Cutanea Tarda
- Interventions
- Hydroxychloroquine, Phlebotomy
- Lead sponsor
- The University of Texas Medical Branch, Galveston
- Results first posted
- 2023-02-17
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT01573754?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.
For software
Read this comparison from software.
The record is JSON. No key.
GET https://conductscience.org/api/comparisons/v1/NCT01573754-sae