Comparison · NCT04311983-944f2096
Tobacco Quitline Only vs Tobacco Quitline Plus Smoke Free Homes: 7day Point Prevalence for Smoking
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. Tobacco Quitline Only vs Tobacco Quitline Plus Smoke Free Homes: 7day Point Prevalence for Smoking. Trial comparisons, record NCT04311983-944f2096. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT04311983-944f2096
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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 | 0.139 | 0.113 | 0.17 | wilson | |
| Risk in group 2 | 0.157 | 0.128 | 0.19 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0173 | -0.0598 | 0.0249 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.889 | 0.669 | 1.18 | log | |
| Odds ratio, group 1 over group 2 | 0.872 | 0.624 | 1.22 | log | |
| Number needed to treat, for one fewer participant with the outcome on Tobacco Quitline Only than on Tobacco Quitline Plus Smoke Free Homes | 57.7 | from the risk difference interval | the interval includes no difference |
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 | Tobacco Quitline Only | Smokers in this study group will be offered their state Tobacco Quitline programs | 78 | 560 | OG000 |
| Group 2 | Tobacco Quitline Plus Smoke Free Homes | Smokers in this study group will be offered their state Tobacco Quitline programs, but if they decline, they will be offered a Smoke Free Homes intervention | 83 | 530 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- PRIMARY
- Title
- 7day Point Prevalence for Smoking
- Description
- Percentage of participants who have 7 day smoking abstinence
- Time frame
- 6 month follow-up
- Population
- Participants were not included if they were lost to follow-up or were duplicate enrollees.
Source ClinicalTrials.gov
Trial
- Title
- Interventions to Help More Low-income Smokers Quit
- NCT number
- NCT04311983
- Phases
- NA
- Conditions
- Tobacco Use Cessation, Smoking Behaviors, Health Disparity
- Interventions
- Tobacco Quitline, Smoke Free Home
- Lead sponsor
- Washington University School of Medicine
- Results first posted
- 2024-10-10
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT04311983?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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