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Table 1 Characteristics of included studies

From: A systematic review and meta-analysis of randomised controlled trials of peer support for people with severe mental illness

Study Location No. DiagnosisΦ Age (yr) Sex (F) Race (BME) EmploymentΩ
Mutual Support
Edmundson 1982 [51] Florida USA 80 N/R N/R N/R N/R N/R
Kaplan 2011 [47]ψ Pennsylvania USA 300 22% SS 78% mood 47 66% 13% 64%
Rogers 2007 [42] Multiple sites USA 1827 50% SS 44% mood 43 60% 43% 29%
Segal 2011 [49] California USA 162 41% SS 59% mood 37 54% 13% 4%
Peer Support
Barbic 2009 [39] Ontario CA 33 79% SS 21% BPD 45 33% N/R 12%
Chinman 2013 [36] South Western USA 282α   53 11% 46% N/R
Cook 2012 [46] Tennessee, USA 428 21% SS 40% BPD 18% mood 43 56% 54% 9%
Cook 2011 [45] Ohio USA 555 20% SS 26% BPD, 24% MDD 46 66% 37% 15%
Craig 2004 [38] London UK 45 100% SS 38 33% N/R N/R
Davidson 2004 [41] Connecticut USA 260 50% SS 34% mood 42 57% 18% 20%
Proudfoot 2012 [37] New South Wales Australia 407 100% BPD N/R 70% N/R N/R
Rivera 2007 [48] New York USA 255 48% SS 26% BPD 22% MDD 38 49% 71% N/R
Simon 2011 [27] USA 118 100% BPD N/R 72% 19% N/R
Sledge 2011 [44] Connecticut USA 89 69% SS 31% mood 41 49% N/R N/R
Van Gestel-Timmermans 2012 [50] Netherlands 333 33% SS 44 66% N/R N/R
Peer Delivered Services
Sells 2006 [43] Connecticut USA 137 61% SS 70% multiple 42 39% 11% N/R
Clarke 2000 [40] Oregon USA 178 60% SS31% SM 37 39% 18% N/R
Solomon 1995 [28] Pennsylvania USA 96 82% SS 12% mood 41 47% 37% N/R
  1. ΦParticipants with a schizophrenia spectrum (SS) disorder, bipolar disorder (BPD), major depressive disorder (MDD), substance misuse (SM), or mood disorder.
  2. ΩCurrently employed.
  3. ΨTwo intervention groups (a peer support email list and an online bulletin board) were merged for analysis.
  4. αRandomised in six teams.