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Table 6 Summary of volunteer characteristics

From: Trained volunteers to support chronically ill, multimorbid elderly between hospital and domesticity – a systematic review of one-on-one-intervention types, effects, and underlying training concepts

Study Sample size Female gender Mean age (standard deviation) Prior specific knowledge
Psychosocial–coordinative support
 White et al. 2012 [111] 57 93% Heterogeneous
 Philippi et al. 2015 [108, 109, 112, 130] 35 85.7% 61.2(9.7) Mainly no
Physical–cognitive activation
 Haider et al. 2017 [113,114,115,116, 127] 50+ Mainly no
 Etkin et al. 2006 [117] 103 89% 53.2(−)
 Stolee et al. 2012 [119] 59 Heterogeneous
 Connelly 2008 [118] 113 90% 50.9(20.7)
Assistance with medication intake
 Wang et al. 2013 [120] 11 55% 45.3(6.6) Yes
 Sales 2013 [121] 6 Yes