Table 1.

Characteristics of the study sample.

Variable		Cohort (n=18,197)		Subcohort (n=9071)
		Count	Percentage	Count	Percentage
Gender
	Female	9251	50.84	5110	56.33
	Male	8946	49.16	3961	43.67
Age, years		56.38a	11.00b	52.60a	9.25b
Education
	Primary or secondary	3831	21.05	970	10.69
	Upper secondary	5068	27.85	2280	25.13
	Less than 4 years of college	3650	20.06	2086	23.00
	Four years or more of college	5648	31.04	3735	41.18
Household income (US)c
	<39 000 US	2132	11.72	568	6.26
	39 000 – 61 000 US	3725	20.47	1632	18.00
	61 000 – 83 000 US	3242	17.81	1519	16.74
	83 000 – 111 000 US	4396	24.16	2449	27.00
	>111 000 US	4702	25.84	2903	32.00
Occupation
	Full-time work	11,145	61.25	6461	71.23
	Part-time work	1453	7.99	783	8.63
	Unemployed	122	0.67	70	0.77
	Housekeeping	99	0.54	29	0.32
	Retired	3720	20.44	912	10.05
	Student/military service	55	0.30	39	0.43
	Disability and other family welfare benefits	1603	8.81	777	8.57
Disease
	Yes	13,323	73.22	6688	73.73
	No	4874	26.78	2383	26.27
Self-reported health status
	Very bad	54	0.29	27	0.30
	Bad	909	4.99	508	5.60
	Neither bad nor good	4583	25.19	2082	22.95
	Good	9891	54.36	5003	55.15
	Very good	2760	15.17	1451	16.00
Physician visit
	Yes	14,627	80.38	7496	82.64
	No	3570	19.62	1575	17.36
Web search engine use
	Ever	8956	49.22	8773	96.71
	Never	9241	50.78	298	3.29
Video search engine use
	Ever	900	4.95	875	9.65
	Never	17,297	95.05	8196	90.35
Social media use
	Ever	1259	6.92	1223	13.48
	Never	16,938	93.08	7848	86.52
App use
	Ever	2358	12.96	2299	25.34
	Never	15,839	87.04	6772	74.66
eHealth used
	Ever	9259	50.88	9071	100
	Never	8938	49.12	0	0
Decision to visit a physician
	Ever	—e	—	2075	22.88
	Never	—	—	6996	77.12
Decision not to visit a physician
	Ever	—	—	2093	23.07
	Never	—	—	6978	76.93

^aThe value is mean age.

^bThe value is standard deviation of age.

^cOne US dollar is approximately 9 Norwegian kr.

^dIt includes the use of one or more tools, such as Web search engines, health apps, video search engines, and social media.

^eNot applicable.