44 Chapter 2 Study Intervention (n) Control (n) Intervention group Control group Authors’ definition of intervention group Intervention type* Intervention caregiver Personal network involvement Duration (months) King et al. (2006) 76 69 TAU+SNI TAU TAU + youth-nominated support team intervention: providing psychoeducation for nominated support persons from within and outside their family, facilitating the supportive contact. individual; family caretaker enhancement professional yes 6 King et al. (2009, 2019) 173 176 TAU+SNI TAU TAU + youth-nominated support team intervention: providing psychoeducation for nominated support persons from within and outside their family, facilitating the supportive contact. individual; family caretaker enhancement professional yes 3 Klein et al. (1998) 10 35 TAU+SNI TAU TAU + friend's connection: providing one-to-one social support and meaningful recreational activities, friendship, and counselling. individual; volunteer linking peer supporter no 6 Leigh et al. (1999) 40 39 TAU+SNI TAU TAU + volunteer-support: providing additional support and assistance in obtaining the material needs, social skills, and leisure activities. individual; volunteer linking volunteer no 4 Litt et al. (2007, 2009) 59 61 SNI TAU Network support intervention (+ contingency management): changing patients’ overall social support network, enhancing support of abstinence, decreasing support of drinking, encouraging AA attendance, with or without reinforcements after completion of assignments. individual; clinical intervention professional no 3
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