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. 2022 Nov 30;18(4):476–493. doi: 10.5964/ejop.6407

Table 2. Study Characteristics of Included Quantitative Studies.

Study Aims Study type Study quality Population Intervention Comparative intervention Measures Results Limitations
Hubbard et al. (2016) The study aimed to evaluate the effectiveness of a brief group psychoeducational intervention for carers of individuals with bipolar disorder. RCT. 17/22 Participants (n=32) were (a) aged ≥ 18 years and caring for someone with a diagnosed bipolar disorder. Recruitment: radio advertisements, local support/mental health services and university emails, in Perth, Australia. Two 150- minute group sessions spaced one week apart. Waitlist control. Burden Assessment Scale (BAS; Reinhard et al., 1994), Knowledge of Bipolar Disorder Scale (Hubbard et al., 2016), Bipolar Disorder Self-Efficacy Scale (adapted from Smith et al). Treatment group had significant reductions in caregiver burden (p < .001) and increases in bipolar disorder knowledge (p < .001) and bipolar disorder self-efficacy. Improvements maintained or increased to follow-up. Small sample size, specific to bipolar carers.
McCann et al. (2015) Effectiveness of a cognitive behaviour therapy (CBT) based guided self-help (GSH) manual in decreasing Expressed Emotion (EE) in carers of a person with depression. RCT 19/22 Primary family carers (n=54) of outpatients with a diagnosis of depression. Recruitment: family carers of patients from the outpatient unit at Suan Prung Psychiatric Hospital, in Chiang Mai, Thailand. Eight module CBT based GSH manual. Standard outpatient department support. The Resilience Scale (RS) (Wagnild & Young, 1993). Significant difference in resilience scores between time points (f (2, 102) = 15.1, p <0.001), with a partial η2 statistic of 0.228 indicating a large effect. Small sample size, sample is lacking diversity.
Perlick et al. (2018) Sustained effects of caregiver‐only adaptation of family‐focused treatment (FFT). Pilot RCT. 18/22 Primary family caregivers (n = 36) of patients with a clinical diagnosis of bipolar I or bipolar II disorder. Recruitment: family members of patients referred from three mental health facilities, in New York, United States of America. 12–15 session FFT sessions with psychoeducation and CBT. 8–12-session health education (HE) intervention delivered via DVDs. Center for Epidemiological Studies of Depression Scale (CES-D; Radloff, 1977), Mental Outcomes Studies Short-Form Health Survey (SF-36; Ware et al., 1995). Significant improvements were observed for mental health outcomes (SF-36) from pre-post and maintained at 6-months follow-up (p = .02) and significant decrease in depression scores (CES-D) from pre-to post-treatment which was maintained over the 6-month period (p = .003). Small sample size, bipolar carer specific, FFT had roughly twice the number of sessions as HE condition. Effect could be due to treatment dose.
Racey et al. (2018) Feasibility and acceptability of Mindfulness–based cognitive behaviour therapy (MBCT) for young people, their parents, and clinicians. Mixed-method feasibility study. 14/24 Parents (n = 29) of young people (aged 14–18 years) with depression were recruited within a single Child and Adolescent Mental Health Service (CAMHS) in Devon, England. 8 session manualised group intervention. N/A (one arm study). Beck Depression Inventory-II (Beck et al.,1996), Rumination Response Scale (Treynor et al. 2003), Self-Compassion Scale (Neff 2016), Mindful Attention Awareness Scale (Brown & Ryan, 2003), The Experiences Questionnaire Decentring Subscale (Fresco et al., 2007). 21 of the 25 young people/parents dyads who started the MBCT course attended at least six or more sessions, suggesting adherence. One arm trial, small sample size.
Berk et al. (2013) Acceptability and usefulness of online guidelines for caregivers of adults with bipolar. Mixed-method feasibility study. 16/24 Participants (n = 121) were adult carers of adults with bipolar. Recruitment: study was advertised at mental health and carer organisations in various English-speaking countries, advertisements posted in doctors’ waiting rooms plus Google advertisements. An information website for carers of a person with bipolar disorder. N/A (one arm study). Items for website usefulness on a four-point scale (‘Very useful’ to ‘Not useful at all), demographic questions and question around estimated time spent viewing the website. 97.4 percent of users found the intervention useful. One arm study, specific to carers of people with bipolar.
Stjernswärd & Östman. (2011) Feasibility of constructing a digitally based tool through an iterative design process in cooperation with potential users. Mixed-methods feasibility study. 14/24 Participants (n = 16) were relatives of a person with depression. Recruitment: advertisement on in regional newspaper, website forum and carers of patients in psychiatric wards in south Sweden. Online platform, including diary activity, social forum, and scales, as a basis for group discussions. N/A (one arm study). SUS (system usability scale). The results show the pros and cons of using the online tools within a group. Small sample size, one arm design and based on potential users’ reflections about the digital tool, not on actual user experiences.