Table 1 Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) diagram illustrating the design and timescales of the pilot PROWORK RCT

 Organisation recruitment

x

 Eligibility screen

x

 Organisation informed consent

x

 Allocation

x

 Manager informed consent

x

 Worker informed consent

x

 Worker and manager RTW toolkit

X

X

X

 Worker coaching sessions

X

X

 Manager training webinar

X

 Control group - usual practice

X

X

X

 Organisational sickness policy data

X

 Organisational sickness report data

X

 Feasibility outcomes (recruitment)

X

 Feasibility outcomes (retention, compliance)

X

X

 Process evaluation

X

X

X

X

X

 Intervention resource used

X

 Economic evaluation

X

X

X

X

X

 Demographics

X

 Days of sick leave

X

X

X

 Mental health

X

X

X

 Quality of life

X

X

X

 Healthcare resource used

X

X

X

 Return to work measures

X

X

X

 Workplace support and communication

X

X

X

 Work outcomes

X

X

X

 Intention to use toolkit

X

X

 Manager RTW actions

X

X

X

 Interviews

X

 Demographics

X

 Mental health management experience

X

 RTW management experience

X

 RTW support for worker

X

X

 Interviews

X