Intervention vs Control: Number of Participants With Cross-sectional Imaging Within 12 Months of Plain Film Index Imaging
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
Measures 6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note | Source |
|---|---|---|---|---|---|---|
| Risk in group 1 | 0.193 | 0.19 | 0.195 | wilson | ClinicalTrials.gov | |
| Risk in group 2 | 0.195 | 0.192 | 0.197 | wilson | ClinicalTrials.gov | |
| Risk difference, group 1 minus group 2 | -0.00183 | -0.00536 | 0.00171 | newcombe hybrid score | ClinicalTrials.gov | |
| Risk ratio, group 1 over group 2 | 0.991 | 0.973 | 1.01 | log | ClinicalTrials.gov | |
| Odds ratio, group 1 over group 2 | 0.988 | 0.966 | 1.01 | log | ClinicalTrials.gov | |
| Number needed to treat, for one fewer participant with the outcome on Intervention than on Control | 548 | from the risk difference interval | the interval includes no difference | ClinicalTrials.gov |
Groups 2
Group 2 names the comparator: control.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code | Source |
|---|---|---|---|---|---|---|
| Group 1 | Intervention | Participants with plain film index imaging at a clinic on or after the randomized date at which the clinic started the intervention. | 19,069 | 98,970 | OG001 | ClinicalTrials.gov |
| Group 2 | Control | Participants with plain film index imaging at a clinic prior to the randomized date at which the clinic started the intervention. | 18,179 | 93,465 | OG000 | ClinicalTrials.gov |
Outcome 5
| Field | Value | Source |
|---|---|---|
| Type | SECONDARY | ClinicalTrials.gov |
| Title | Number of Participants With Cross-sectional Imaging Within 12 Months of Plain Film Index Imaging | ClinicalTrials.gov |
| Description | An indicator of one or more instances of cross-sectional imaging (MRI or CT) within 12 months of plain film index imaging. Participants with cross-sectional index imaging are excluded. | ClinicalTrials.gov |
| Time frame | 12 months | ClinicalTrials.gov |
| Population | ClinicalTrials.gov |
Trial 8
| Field | Value | Source |
|---|---|---|
| Title | Trial of Inserting Prevalence Information Into Lumbar Spine Imaging Reports | ClinicalTrials.gov |
| NCT number | NCT02015455 | ClinicalTrials.gov |
| Phases | NA | ClinicalTrials.gov |
| Conditions | Low Back Pain, Back Pain, Lumbar Pain, Backache | ClinicalTrials.gov |
| Interventions | Epidemiologic benchmarks included in lumbar imaging reports | ClinicalTrials.gov |
| Lead sponsor | University of Washington | ClinicalTrials.gov |
| Results first posted | 2022-02-14 | ClinicalTrials.gov |
| Results on ClinicalTrials.gov | https://clinicaltrials.gov/study/NCT02015455?tab=results | ClinicalTrials.gov |
Source 4
| Field | Value | Source |
|---|---|---|
| Release | trial-comparisons-2026-03-23-0.1.0 | ClinicalTrials.gov |
| Release manifest SHA-256 | f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57 | ClinicalTrials.gov |
| AACT copy | 2026-03-23 | ClinicalTrials.gov |
| 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 | ClinicalTrials.gov |
Release trial-comparisons-2026-03-23-0.1.0
ClinicalTrials.gov's posted results, through CTTI's AACT: ClinicalTrials.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.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.
ClinicalTrials.gov: none 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.