Comparison · NCT01977599-4e790adb
No Text Message Reminder (Control) Arm vs Text Message Reminder Arm: Mobile Prevalence
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. No Text Message Reminder (Control) Arm vs Text Message Reminder Arm: Mobile Prevalence. Trial comparisons, record NCT01977599-4e790adb. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT01977599-4e790adb
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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 | 0.389 | 0.361 | 0.418 | wilson | |
| Risk in group 2 | 0.406 | 0.378 | 0.435 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0173 | -0.0578 | 0.0232 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.957 | 0.865 | 1.06 | log | |
| Odds ratio, group 1 over group 2 | 0.93 | 0.785 | 1.1 | log | |
| Number needed to treat, for one fewer participant with the outcome on No Text Message Reminder (Control) Arm than on Text Message Reminder Arm | 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 | No Text Message Reminder (Control) Arm | Control Arm, in which patients are invited to breast screening as per standard West of London Breast Screening Protocol (i.e. without a text message appointment reminder). Uptake of breast screening in this group will be compared with the text message reminder group to test for significant differences. | 435 | 1,118 | OG000 |
| Group 2 | Text Message Reminder Arm | Patients randomly allocated to this arm of the study will be sent a text message reminding them of the time, date and venue of their breast screening appointment 48 hours in advance.~Text Message Reminder for Breast Screening Appointment: Non-clinical/administrative. | 456 | 1,122 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- SECONDARY
- Title
- Mobile Prevalence
- Description
- Number of women with a valid mobile telephone number on the GP Clinical System
- Time frame
The accuracy of patient mobile records was assessed for the intervention group at the time the text reminder was sent (i.e. 48 hours before the appointment). A check for the control group was performed at the same time.
- Population
Source ClinicalTrials.gov
Trial
- Title
- Are Text Message Reminders an Effective Intervention for Improving the Uptake of Breast Screening?
- NCT number
- NCT01977599
- Phases
- NA
- Conditions
- Breast Screening
- Interventions
- Text Message Reminder for Breast Screening Appointment
- Lead sponsor
- Imperial College Healthcare NHS Trust
- Results first posted
- 2021-04-06
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT01977599?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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