Baseline intrusive memory diary
memory distress, traumatic
EVENTS
At baseline, participants completed a daily online intrusive memory diary for 7 days to record the number of intrusive memories to work-related traumatic events. This diary was adapted from previous studies [In the intrusive memory diary, participants recorded the number of intrusive memories they had each day, using the following questions: “Have you had any intrusive memories on [date]?” (yes/no response) and if yes, “Please select how many intrusive memories you have had” (− 0 +; participant clicks −/+ to select a number). Reminders to record were sent daily by email. Researchers were available to support participants with any queries or uncertainties about the definition of intrusive memories. Note that in this trial we restricted the daily measure to a simple symptom count to reduce burden to participants (i.e., we did not add further cognitive judgement tasks such as memory distress or vividness ratings each time they made an entry in their diaries and aimed by so doing to enhance the completion rate of the primary outcome measure).Those who reported at least 3 intrusive memories during the baseline week were asked to complete questionnaires (see below) and were randomised. The total number of intrusive memories that each participant recorded was included as a baseline covariate in the statistical modelling.