Table 7.

Summary of data analysis methods and key findings.

Article	Measured Parameter	Scales Used	Data Analysis Method	Findings
				Activity/Feature	Association with Loneliness/SI Score
Goonawardene et al. [26]	SI	Lubben Social Network Scale, dJG, Custom Survey, GDS, Abbreviated Mental Test Score, PQSI, Katz ADL Scale, Lawton IADL Scale	Correlation analysis	Time out of home	Associated with social loneliness score but not with Emotional Loneliness Score Significantly negatively correlated with SI
				Time spent in living room	Significantly correlated with emotional loneliness score
				Daytime napping	Significant positive correlation with social loneliness
				GDS	Significant positive correlation with composite SI score
				Lawton and Brody IADL and PSQI sleep quality	Significant correlation with emotional loneliness score
Huynh et al. [37]	Loneliness	dJG Scale, GDS	Correlation analysis	Frequency of going out of home	Highest correlation with loneliness
				Time spent in kitchen	Significant correlation with loneliness level
Martinez et al. [27]	SI	Lubben Social Network Scale,	Predictive modelling	N/A	N/A
Austin et al. [44]	Loneliness	University of California Los Angeles (UCLA) Loneliness scale	Longitudinal linear mixed effects regression modelling	Time out of home	Negatively associated with loneliness
				Number of computer sessions	Significantly correlated with loneliness score
Sanchez et al. [61]	Loneliness	ESTE-R	Predictive modelling	N/A	N/A
Walsh et al. [45]	Loneliness	De Jong Gierveld Scale, CES-D, HADS, PSQI, MOCA, SF-36, IADL	Correlation analysis and principle component analysis	Time spent in living room	Associated with increased loneliness, anxiety, and poor sleep and inversely with IADL
				Time spent in bed room	Inversely associated with anxiety, depression, IADL, and poor sleep
				Sleep/nocturnal movement	Inversely correlated with IADL and positively associated with loneliness score
				Time out of home	associated with IADL
Petersen et al. [46]	Loneliness	UCLA Loneliness Scale, Berkman’s Social Disengagement Index	Logistic regression-based classifier and correlation analysis	Time out of home	Inversely correlated with loneliness score