Comparison · NCT01977599-311f2d6e
No Text Message Reminder (Control) Arm vs Text Message Reminder Arm: Attendance at Breast Screening
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: Attendance at Breast Screening. Trial comparisons, record NCT01977599-311f2d6e. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT01977599-311f2d6e
On this page
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 | 0.591 | 0.562 | 0.62 | wilson | |
| Risk in group 2 | 0.643 | 0.615 | 0.671 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0523 | -0.0923 | -0.012 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.919 | 0.861 | 0.981 | log | |
| Odds ratio, group 1 over group 2 | 0.801 | 0.676 | 0.95 | 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 | 19.1 | 10.8 | 83.3 | from the risk difference interval |
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. | 661 | 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. | 722 | 1,122 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- PRIMARY
- Title
- Attendance at Breast Screening
- Description
Number of women that participate in breast screening in the control (no text message reminder) compared with the number of women that participate in the intervention (text message reminder 48 hours before appointment).
- Time frame
- The text message was sent 48 hours before the appointment, attendance was assessed 60 days after the appointment date.
- 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.
For software
Read this comparison from software.
The record is JSON. No key.
GET https://conductscience.org/api/comparisons/v1/NCT01977599-311f2d6e