Table 1.

Search keywords and result statistics for computer science and social science databases.

Database and keywords combination			Search results, n
IEEE Xplore
	Loneliness AND Detection	13
	Loneliness AND Sensing	27
	Loneliness AND Passive Sensing	1
	Loneliness AND Monitoring	15
	Social Isolation AND Detection	56
	Social Isolation AND Sensing	41
	Social Isolation AND Passive Sensing	1
	Social Isolation AND Monitoring	65
Scopus
	Loneliness AND Detection	4373
	Loneliness AND Sensing	725
	Loneliness AND Passive Sensing	61
	Loneliness AND Monitoring	6443
	Social Isolation AND Detection	5501
	Social Isolation AND Sensing	834
	Social Isolation AND Passive Sensing	51
	Social Isolation AND Monitoring	5901
ACM
	Loneliness AND Detection	703
	Loneliness AND Sensing	1339
	Loneliness AND Passive Sensing	27
	Loneliness AND Monitoring	603
	Social Isolation AND Detection	313
	Social Isolation AND Sensing	631
	Social Isolation AND Passive Sensing	10
	Social Isolation AND Monitoring	357
PubMed
	Loneliness AND Detection	220
	Loneliness AND Sensing	770
	Loneliness AND Passive Sensing	8
	Loneliness AND Monitoring	200
	Social Isolation AND Detection	2238
	Social Isolation AND Sensing	1981
	Social Isolation AND Passive Sensing	24
	Social Isolation AND Monitoring	1202
Web of Science
	Loneliness AND Detection	109
	Loneliness AND Sensing	1130
	Loneliness AND Passive Sensing	16
	Loneliness AND Monitoring	299
	Social Isolation AND Detection	350
	Social Isolation AND Sensing	1195
	Social Isolation AND Passive Sensing	13
	Social Isolation AND Monitoring	701
Embase
	Loneliness AND Detection	137
	Loneliness AND Sensing	22
	Loneliness AND Passive Sensing	1
	Loneliness AND Monitoring	235
	Social Isolation AND Detection	390
	Social Isolation AND Sensing	34
	Social Isolation AND Passive Sensing	1
	Social Isolation AND Monitoring	704