Table 1.

Organization of the review.

Research Question	Topic	Sub-Topic	Sub-Topic
RQ1: Relationship Characteristics
	Mentoring length and dosage
	Quality of the relationship: Core ingredients
	Types of activities
	Mentoring Termination
RQ2: Current Measurement Approaches
RQ3: Mechanism through which the Mentoring Interaction Influences Relationship Quality and Duration	5Cs; PYD Parent-child relationship
RQ4: Moderators Factors of Mentoring Relationships:	Mentor Characteristics	Age Intra-personal characteristics: Personality traits Well-being Relational history Personal attributes: Former experience Multicultural competence Attitudes toward children and adolescents Commitment
	Mentee Characteristics	Age Risk Status Relational history Personality traits
	Mentoring Dyads	Culture	Culture Race and Ethnicity
		Gender	Mentors Mentees
		Matching Criteria
	Program Practices	Guidance
		Ties with parents and guardians