Comparison · NCT03932799-40a92e90
Washington vs Ohio: Depressive Symptoms (PHQ-4)
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. Washington vs Ohio: Depressive Symptoms (PHQ-4). Trial comparisons, record NCT03932799-40a92e90. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT03932799-40a92e90
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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 | 0.163 | 0.147 | 0.18 | wilson | |
| Risk in group 2 | 0.201 | 0.16 | 0.248 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0377 | -0.0876 | 0.00601 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.812 | 0.638 | 1.03 | log | |
| Odds ratio, group 1 over group 2 | 0.776 | 0.575 | 1.05 | log | |
| Number needed to treat, for one fewer participant with the outcome on Washington than on Ohio | 26.5 | 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 | Washington | Injured workers in the Washington Department of Labor and Industries (L\&I) state fund insurance system - required to obtain prior authorization for opioids prescribed after 6 weeks from an injury. | 322 | 1,976 | OG000 |
| Group 2 | Ohio | Injured workers in the Ohio Bureau of Workers' Compensation (BWC) state fund insurance system - subject to a retrospective review of claim if receiving opioid prescription after 6 weeks from injury. Prescriber notified if best practices are not being documented. | 64 | 319 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- SECONDARY
- Title
- Depressive Symptoms (PHQ-4)
- Description
- 2-item PHQ-4 subscale assessing how often participant was bothered by depressive symptoms on 4-point scale (0 = not at all, 3 = nearly every day).~1 = summed subscale score ≥3; 0 = otherwise.
- Time frame
- 12 months after injury
- Population
- * Analysis performed within a distinct survey sample of workers~* Estimates for WA have been survey-weighted; sampling weights for OH were always 1.
Source ClinicalTrials.gov
Trial
- Title
- Comparing State Payer Strategies to Prevent Unsafe Opioid Prescribing
- NCT number
- NCT03932799
- Phases
- Conditions
- Opioid Use, Opioid-Related Disorders
- Interventions
- Prospective prior authorization (PA) with hard stops in Washington, Retrospective review (RR) with prescriber notification in Ohio
- Lead sponsor
- University of Washington
- Results first posted
- 2023-09-28
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT03932799?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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