Table 2. Descriptive coding of the measures used to assess social relationships.

Type of Measure		Description	Example of Measure
Functional		Functions provided or perceived to be available by social relationships
	Received support	Self-reported receipt of emotional, informational, tangible, or belonging support	• Inventory of Social Supportive Behaviors [213]• UCLA Social Support Interview [214],[215]• Social Support Behaviors Scale [216]
	Perceptions of social support	Perception of availability of emotional, informational, tangible, or belonging support if needed.	• EPESE support questions [217]• Malmo Social Support Scale [218]• Social Support Questionnaire [219]• Interpersonal Support Evaluation List [220]
	Perception of loneliness	Feelings of isolation, disconnectedness, and not belonging	• Loneliness Scale [221]• UCLA Loneliness Scale [222]
Structural		The existence and interconnections among differing social ties and roles
	Marital status	married versus other	• Binary item: Married yes, no• Married, never married, divorced, separated, widowed
	Social networks	network density or size, number of social contacts	• Convoy measure [223]• Social Network List [224]
	Social integration	Participation in a broad range of social relationships; including active engagement in a variety of social activities or relationships, and a sense of communality and identification with one's social roles.	• Malmo Influence, Contact, & Anchorage Measure [225]• Social Network Index [226],[227]• Social Participation Scale [92]
	Complex measures of social integration	A single measure that assesses multiple components of social integration such as marital status, network size and network participation.	• Social Network Index [36]• Social Network Questionnaire [228]• Social Connections Index [102]• Rand Social Health Battery [229]
	Living alone	Living alone versus living with others	• Binary item: yes, no• Number of people in household
	Social isolation	Pervasive lack of social contact or communication, participation in social activities, or confidant	• Social Isolation Scale [82]
Combined		Assessment of both structural and functional measures
	Multifaceted Measurement	Multiple measures obtained that assess more than one of the above conceptualizations.