Recruitment, randomization and sample
post-traumatic stress disorder, PTSD, post-traumatic stress syndrome
RECRUITMENT
The recruitment of PHCCs took place between January and October 2016. A total of 30 PHCCs were invited to participate from both public and private health care centres, and 22 accepted to participate (15 from public health care centres and seven from private health care centres). The centres were matched in pairs based on similarities in terms of size, ownership, socioeconomic conditions in the catchment area and the average proportion of enrolled patients that had a mental health diagnosis. The extent of RC resources was also taken into consideration. From each pair, one centre was randomly selected to the intervention group (The recruitment of patients took place at the 22 PHCCs between November 2016 and January 2018. The patients were invited to participate in the study at the intervention centres by their assigned RC. At the control centres, eligible patients were invited to participate by their GP.Employed patients with a F43 diagnosis as the main diagnosis were eligible for participation, for summary of diagnostic criteria (see Table Summary of F 43 diagnoses included in the present studyPatients with post-traumatic stress disorder (PTSD), patients who did not read or speak Swedish and patients who have had a sick-leave period of more than 60 consecutive days during the past three years were excluded. Patients seeking care for stress-related symptoms who met the inclusion criteria were included in the study after giving their informed consent. Treatment as usual (TAU), such as medical treatment or therapy, was offered to both cases and controls during the process. In total, 135 patients were recruited to the study, 66 to the intervention group and 69 to the control group. The allocation of participant patients is described in Fig. Flowchart of allocation of participant patients. PHCC = primary health care centres. TAU = treatment as usual. PTSD = post-traumatic stress syndrome. * Exclusion criteria: a former completed period of sick leave exceeding 60 days during the past three years. ** Sick leave was not registered in the sick leave insurance systemThe final study sample included 112 participants, 54 participants in the intervention group and 58 participants in the control group (see Table Study sample
