Table 1 Demonstrating the outcome measures and the differing timepoints at which these are expected to be collected
Outcome Measure | Definition | Timepoint Collected (T0, Ti, Te) |
|---|---|---|
Age | Age at the time of the initial invitations | To |
Ethnicity | Ethnicity code according to record based upon 2011 Census | To |
IMD | Level of deprivation based upon postcode | To |
Appointment Type | Open or timed invitation | To |
SMS allocation | Usual Care, Behavioural SMS or Behavioural SMS with new video | To |
Location of invitation | Location of screening service in which appointment is due within London | To |
Invitation designation | First invitation or routine recall appointment | To |
Booked appointment | Whether an open invitation has been booked | Ti, Te |
Attendance at appointment | Whether an individual has attended the appointment | Ti, Te |
Message Sent | Whether a message was sent or was unable to be sent (e.g. wrong number) | Te |
Perspectives upon novel video | Collected via an online questionnaire available to participants allocated to the Behavioural SMS + video arm (questionnaire accessed on same webpage as video) | Te |