Table 3 Overview of process measures according to the Re-Aim framework

Reach (individual level)

1. Patient response versus nonresponse rate.

2. Characteristics of participants compared to non-participants.

3. Percentage of patients who completed the intervention.

1. Response and non-response data.

2. Percentages excluded and reasons for exclusion (using drop-out and loss-to-follow-up data, reported reasons for declining participation, data from NCR on source population).

3. Process evaluation questionnaire (patient version).

Effectiveness (individual level)

4. Effect of the intervention on primary and secondary outcomes.

5. Unintended adverse effects of the program.

4. Data regarding primary and secondary outcome measures.

5. Self-reported in process evaluation questionnaire.

Tailoring (individual level)

6. Extent to which the content, intensity, and duration of the intervention was tailored to the patient’s needs, limitations, wishes and capacities.

7. Extent to which the intervention enabled the patient to return to work or continue work.

8. Extent to which the return-to-work/work retention plan fitted the work-related needs, capacities and wishes of the patient.

6–8. Process evaluation questionnaire (patient version).

Adoption (organizational level)

9. Attitude from the occupational therapists and reintegration consultants regarding the intervention after adoption of the program.

10. Extent to which the program corresponded with organizational goals and capacities of the participating centres hospital and the reintegration agency.

9. Process evaluation questionnaire (occupational therapist and reintegration consultant version).

10. Data regarding (cost-)effectiveness of the intervention and data from the process evaluation questionnaire (occupational therapist and reintegration consultant version).

Implementation (individual and organizational level)

11. The extent to which recruitment was conducted according to protocol.

12. The extent to which the intervention was delivered according to protocol.

13. Extent to which the intervention was delivered according to budget.

11. Evaluating through what recruitment path (via the NCR, health care practitioners or social media)

12. Process evaluation questionnaire (occupational therapist and reintegration consultant version).

13. Measured by evaluating study procedures.

Maintenance (individual, organizational level)

14. Extent to which the program produced long-term individual behaviour change and established return to work.

15. Extent to which organizations will sustain the program in the future.

16. Extent to which future patients are likely to participate in the program.

14. Data regarding the primary and secondary outcome measures.

15. Process evaluation questionnaire (occupational therapists and reintegration consultant version).

16. Process evaluation questionnaire (patient version).