A randomised controlled trial to test the effectiveness of primary care-based text-message reminders in facilitating uptake of colorectal cancer screening in London
The aim of this study is to test the effectiveness (intention-to-treat analysis) and efficacy (per-protocol analysis) of primary care based text-message reminders to promote uptake of bowel cancer screening in London.
1. East Midlands Derby Ethics Committee, 01/04/2015, ref: 15/EM/0159
2. Confidentiality Advisory Group,12/08/2015 ref: 15/CAG/0156
Non-clinical randomised controlled trial
Primary study design
Secondary study design
Randomised controlled trial
Patient information sheet
Not available in web format, please use the contact details to request a patient information sheet
At age 60, and then every two years up to and including age 74, all patients registered with a GP and living in England (who have not explicitly opted out of screening) are sent an invitation letter with the screening information booklet by their local Hub. The gFOBt kit and instructions follow 8-10 days later. The individual is asked to collect samples from three separate bowel motions, and return the completed kit to the Hub in a pre-paid envelope for processing (see Figure 1). Repeat gFOBt kits are sent out following a ‘spoilt kit’, ‘technical failure’, or an ‘unclear result’. A reminder letter is sent after four weeks of non-response. The screening episode is closed if there has been no response within 13 weeks without another notification to the individual. The GP practices will receive a letter for their patients’ non-attendance. Following an abnormal result a referral is made to the local screening centre for further diagnostic investigations.
People who are randomised to the intervention group will receive a text-message reminder in addition to the standard materials if they have not returned the test kit at eight weeks of their screening episode (i.e. three weeks after the ‘reminder letter’). The reminder text will include the name of the GP practice, GP endorsement, the purpose of the text-message, and guidance on where to get more information. The content of the text-message has been selected by a steering group involving patient representatives, GP Cancer Leads, Public Health England-Behavioural Insights Team and the BCSP London Hub.
Usual Care group:
Individuals in the control group will only receive the standard NHS CRC screening materials.
Primary outcome measures
The proportion of people classified as adequately screened within 18 weeks of the invitation letter in the control and intervention group.
Secondary outcome measures
1. Participant update in the control and intervention groups, is evaluated in the 18th week of the screening episode
2. The effect of the intervention on screening uptake by demographic variables (socioeconomic status i.e. Index of Multiple Deprivation (IMD) rank, gender, age, CCG and screening round) measured at the end of the intervention
Overall trial start date
Overall trial end date
Participant inclusion criteria
1. Aged between 60 and 75
2. Registered with a participating London GP practice enrolled in the study.
3. Eligible for bowel cancer screening
Target number of participants
Participant exclusion criteria
1. Stoma patients who have had their entire large bowel removed
2. Stoma patients who have had an Ileostomy
3. Opted out from text-messaging services which is provided by their registered GP practice
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
NHS Bowel Cancer Screening Programme London Hub
St Marks Bowel Cancer Screening Centre St Marks Hospital,Watford Road Harrow Middlesex
University College London
Joint Research Office
University College London
North West London Hospitals Trust
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
We are currently aiming to publish the study protocol before we commence with the trial in a peer reviewed journal. Furthermore, the results of the trial will be written up for publication in a peer reviewed journal and presented at conferences which will target health professionals, academics and policy makers.
Intention to publish date
Participant level data
To be made available at a later date
Results - basic reporting