Table 1.

Timeline of participant enrolment, interventions, assessments and patient records data collection

	−1	0	T1	T2	T3
	Enrolment Screening	Allocation Baseline and randomisation	Follow-up 4 months	Follow-up 12 months	Follow-up 18 months
Enrolment
Eligibility screen	X
Informed consent		X
Randomisation		X
Intervention
Peer support worker and recovery booklet (intervention group)
Recovery booklet only (control group)		X
Assessments
Sociodemographic information		X
Client Satisfaction Questionnaire (CSQ)		X	X		X
Social Outcomes Index (SIX)		X	X		X
Illness Management and Recovery (IMR) scale		X	X		X
Questionnaire on the Process of Recovery (QPR)		X	X		X
EuroQol Health Questionnaire (EQ-5D)		X	X		X
UCLA Loneliness Scale-8		X	X		X
Lubben Social Network Scale-6		X	X		X
Health and Lifestyle Survey Social Capital Questionnaire		X	X		X
Brief Psychiatric Rating Scale (BPRS)		X	X		X
Alcohol Use Disorder Identification Test for Consumption (AUDIT-C)		X
Drug Abuse Screening Test - 10 item version (DAST-10)		X
Recovery Promoting Relationships Scale (intervention group only)			X
Information on use of self-management materials			X		X
Patient records data (from previous 12 months to time point)
Number of admissions to acute mental health services		X		X
Number of compulsory admissions to acute mental health services		X		X
Total number of days in acute care		X		X
Number of kept appointments with community mental health services		X		X
Number of missed appointments with community mental health services		X		X
Primary ICD-10 diagnosis		X
Secondary ICD-10 (International Classification of Disease - 10th revision) diagnosis		X
Most recent care cluster		X
Care Programme Approach status		X