Comparison · NCT00650585-50cf66a6
Treatment Group vs Control Group: Self-reported 30-day Use of Alcohol
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. Treatment Group vs Control Group: Self-reported 30-day Use of Alcohol. Trial comparisons, record NCT00650585-50cf66a6. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT00650585-50cf66a6
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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 | 0.143 | 0.129 | 0.158 | wilson | |
| Risk in group 2 | 0.14 | 0.127 | 0.155 | wilson | |
| Risk difference, group 1 minus group 2 | 0.00291 | -0.0171 | 0.0229 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 1.02 | 0.886 | 1.18 | log | |
| Odds ratio, group 1 over group 2 | 1.02 | 0.869 | 1.21 | log | |
| Number needed to treat, for one more participant with the outcome on Treatment Group than on Control Group | 344 | from the risk difference interval | the interval includes no difference |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: control.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Treatment Group | School received Project ALERT, a substance use prevention program with 11 lessons the first year and 3 booster lessons the second year | 332 | 2,324 | OG001 |
| Group 2 | Control Group | School did not receive Project ALERT, a substance use prevention program | 330 | 2,358 | OG000 |
Source ClinicalTrials.gov
Outcome
- Type
- PRIMARY
- Title
- Self-reported 30-day Use of Alcohol
- Description
Students completed an 81-item self-report questionnaire. They were asked on how many days they had used alcohol in the previous 30 days. Response options included none, 1 or 2 days in the last month, 3 to 5 days in the last month, 6 to 19 days in the last month, and 20 or more days in the last month. Response options were dichotomized into none and at least one day.
- Time frame
- measured approximately 30 days after intervention completed
- Population
Data were cleaned to remove cases with logical inconsistencies which decreased our sample by 3.6% of respondents at pretest and 7.5% at post-test. Missing covariate data were imputed using the Expectation Maximization (EM) algorithm. Missing data were imputed using the EM algorithms implemented in the Missing Value Analysis module in SPSS 13.0.
Source ClinicalTrials.gov
Trial
- Title
- An Effectiveness Trial of Project ALERT
- NCT number
- NCT00650585
- Phases
- NA
- Conditions
- Alcohol Drinking, Smoking, Marijuana Smoking
- Interventions
- Project ALERT
- Lead sponsor
- Pacific Institute for Research and Evaluation
- Results first posted
- 2009-10-21
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT00650585?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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