Table 4.

Topic analysis results from (1) LDA topic modeling, (2) word-topic network, (3) topic naming and grouping workshops.

Period and topic group		Topic number	Topic name	Document frequency
Period 1
	A	T03	Telemonitoring	20
		T04	Monitoring technology/infrastructure	24
		T05	IT-based decision support	18
		T09	Smart home activity detection	59
		T10	eHealth infrastructure	27
	B	T01	Lifetime family care	15
		T06	Elderly care	13
		T08	Robot-based health service	15
		T13	Health event management	13
	C	T07	Web-based health education	21
		T11	Web-based health contents delivery	35
	D	T02	Security architecture in hospitals	27
		T12	Care delivery strategy	21
Period 2
	A	T01	Elderly care	66
		T02	Network integration	30
		T04	Signal/image detection	31
		T09	Communication platform	37
		T12	Privacy and security	40
		T13	Classification algorithm	25
		T14	Smart home activity detection	79
		T15	Monitoring technology/infrastructure	55
	B	T03	Chronological disease	26
		T05	Clinical service	20
		T06	PHR based on social media	22
		T20	Health activity management	22
	C	T07	Online patient community	41
		T17	Age-sensitive web accessibility	21
	D	T08	Telemedical service	33
		T11	Primary care delivery	26
		T19	Care delivery policy	50
	E	T10	eHealth literacy	24
	F	T16	Healthcare ICT investment (mobile)	38
		T18	Mobile-based health contents delivery	21
Period 3
	A	T01	IoT and sensor network system	146
		T04	Activity sensing algorithm	126
		T13	Telemonitoring infrastructure	44
		T18	Privacy and security	47
	B	T06	e-Fitness	24
		T08	Chronological disease	46
		T12	Self-management	54
		T15	Exercise management	106
		T16	Elderly care	105
		T20	Cancer management	45
		T22	Mental health management	58
		T26	Lifetime family care by gamification	29
		T27	Chronological disease management	50
	C	T11	eHealth service benefit	38
	D	T07	Telemedical service	40
		T28	Care delivery policy	179
	E	T24	Health literacy	80
	F	T02	Health behavior awareness (mobile)	24
		T10	Age/gender-sensitive notification	58
		T17	Medication management (mobile)	80
		T25	Community healthcare (mobile)	72
		T29	mHealth data communication	52
	G	T05	mHealth technology acceptance	30
		T14	eHealth system design	63
		T21	mHealth app design	56
		T23	Usability for health workers/patients	49
		T30	System design	27
	H	T09	Health worker training	49
	I	T03	Assessment accuracy	52
	N/Aa	T19	Etc	26
Period 4
	A	T19	Activity sensing algorithm	212
		T20	Smart home technology infrastructure	307
	B	T03	Activity management	120
		T12	Chronological disease management	67
		T13	Mental healthcare	73
		T17	Emergency management	72
		T18	Rehabilitation training	70
		T21	Cancer management	89
		T22	Mental healthcare	130
		T24	Chronological disease management	56
		T25	Telemonitoring	71
		T26	Weight management	95
		T28	Age/gender-sensitive service	80
	C	N/A	N/A	N/A
	D	T02	Care cost-effectiveness (hospital)	61
		T05	Telemedicine platform	78
		T10	Community service	181
	E	T04	Health literacy	111
	F	T01	Mobile support for smoking cessation	109
		T07	Lifetime family care (mobile)	88
		T15	Healthcare service providing (mobile)	117
		T23	Medication management (mobile)	86
	G	T06	mHealth system design	160
		T14	Health system design	37
		T16	Elderly technology acceptance	69
		T27	Medical healthcare app	65
		T29	Technology acceptance	75
		T30	Mobile health system design	65
	H	N/A	N/A	N/A
	I	T11	Assessment algorithm	87
	J	T08	Blockchain and healthcare	66
		T09	Telemedicine/telesurgery technology	43

^aN/A: not applicable.