Table 2.

Descriptive statistics of RISP predictor variables (N=542).

Variables and questions			Mean (SD)
Information insufficiencya (1-100 scale)
	Perceived current health knowledge: Estimate your knowledge of health, with 1=knowing nothing and 100=knowing everything you could possibly know about health maintenance.	59.88 (17.13)
	Sufficiency threshold: This time, using that same scale, estimate how much knowledge you think you need on health maintenance.	73.27 (20.56)
Information subjective norms (1-5 scale)b
	Injunctive: My family expects me to seek health knowledge.	3.78 (0.88)
	Injunctive: My friends expect me to seek health knowledge.	3.62 (0.94)
	Descriptive: People in my life whose opinions I value seek health knowledge.	3.53 (0.86)
Perceived risk (1-5 scale)c
	My health may face problems in the next year.	2.51 (1.09)
	In the next year, I may possibly suffer from diseases that may impact my job or life.	2.44 (1.18)
	In the next year, I am confident about my health (reverse coding).	2.20 (0.97)
Negative affect (1-5 scale)d
	How much of the following do you feel about your health? Not worried…Very worried	3.11 (1.05)
	How much of the following do you feel about your health? Not anxious…Very anxious	2.71 (1.14)
Relevant channel beliefs (1-5 scale)e
	To what extent do you trust health information on web portals?	3.53 (0.74)
	To what extent do you trust health information on social media?	3.46 (0.82)
	To what extent do you trust health information on mobile phone apps?	3.45 (0.92)
Perceived information-gathering capacities (1-5 scale)f
	It is difficult to find health knowledge (reverse coding).	3.39 (1.06)
	I don’t know where to find health knowledge (reverse coding).	3.37 (1.07)
	I have a hard time understanding health knowledge (reverse coding).	3.38 (1.23)
Age			33.01 (9.19)
Gender (female), %			52.0 (—)
Income			3.76 (1.51)

^aIn the questionnaire, the item “current knowledge” was presented first, followed by the item “sufficiency threshold.”

^bα=.70.

^cα=.81.

^dα=.79.

^eα=.61.

^fα=.82.