Intervention PCCs
For the intervention PCCs, an extended instruction about the complex intervention with early cooperation and person-centred dialogue meeting was conducted (8-hour session for the entire medical care personnel group including rehabilitation coordinator). During the RCT, each intervention PCC was regularly supported by a research team specialised nurse/counsellor to secure adherence to the complex intervention. The complex intervention with early cooperation and person-centred dialogue meeting was added to the care manager CAU function provided at the control PCCs, which already included engagement of psychologist/psychotherapist as well as other members of the psychosocial team according to national guidelines and focus on the patient’s symptom development and preferences. Early cooperation was carried out by (1) information from the care manager to the rehabilitation coordinator about the patient’s status and care planning concerning workplace contact in conjunction with the care manager’s and patient’s initial meeting and (2) in addition to CAU team meetings with the psychosocial team when psychologist/other staff were engaged, regular meetings among the care manager, GP and rehabilitation coordinator when the care manager indicated that the patient was ready to start rehabilitation process (