Table 4.

Associations between health and internet use frequency and purpose (n=6562).

Independent variables: internet use		Self-rated health, ORa (95% CI)	P value	Physical health, OR (95% CI)	P value	Mental health, OR (95% CI)	P value
Frequency (reference: never)
	Rarely	1.64 (1.38-1.94)	<.001	1.25 (1.05-1.47)	.01	1.27 (1.07-1.51)	.006
	Sometimes	1.41 (1.19-1.66)	<.001	1.28 (1.08-1.51)	<.004	1.20 (1.02-1.42)	.03
	Often	1.67 (1.44-1.94)	<.001	1.44 (1.23-1.67)	<.001	1.39 (1.19-1.62)	<.001
	Very frequently	1.48 (1.26-1.74)	<.001	1.76 (1.48-2.08)	<.001	1.52 (1.28-1.79)	<.001
Purpose (reference: no)
	Web-based payment	1.24 (1.08-1.42)	.002	1.08 (0.94-1.24)	.30	1.22 (1.06-1.41)	.005
	Web-based learning	1.49 (1.33-1.67)	<.001	1.41 (1.25-1.58)	<.001	1.29 (1.15-1.45)	<.001
	Web-based socializing	1.51 (1.34-1.70)	<.001	1.58 (1.41-1.78)	<.001	1.48 (1.3-1.66)	<.001
	Web browsing	1.40 (1.25-1.57)	<.001	1.39 (1.24-1.55)	<.001	1.29 (1.15-1.45)	<.001

^aOR: odds ratio.