Table 6.

Overview of results: network density and depression

Author	Depression measure	Social network measure	N a	Results b	Quality
Cross-sectional studies
Dorrance Hall et al., 2019 [90]	CES-D (9)	Number of observed links divided by perceived potential links among network members (indicated by respondent; links is being defined as speaking on a monthly basis)	2249	+	Good
Vicente & Guadalupe, 2022 [107]	GDS-15	Proportion of network members that knows one another; calculated by dividing the number of actual connections between network members by the number of potential connections	612	0	Poor
Longitudinal studies
Bui, 2020 [19]	CES-D (11)	Ratio of actual ties to perceived possible ties (indicated by respondent; ties is being defined as having any contact)	2200	+	Good
Coleman et al., 2022 [110]	GDS-5	Mean of closeness of the tie between alters	113	0	Good

^an: Sample size, baseline sample was used in longitudinal studies

^bResults: 0 indicates no sig. relationship (p ≥ 0.05), + indicates sig. relationship (p < 0.05)

Depression measures: CES-D Centre of Epidemiologic Studies Depression Scale; GDS Geriatric Depression Scale