TABLE 1.

Profiles of participants (N = 9633).

Factor/Level	N	%	Factor/Level		N		%
Gender			Parent–child relationships
Male	4702	48.8	Very good		3455		35.9
Female	4931	51.2	Good		5687		59.0
Place of Internet usage			Not good		491		5.1
Home	8934	92.7	Purpose of Internet usage
School’s computer room	235	2.4	Online dating		2882		10.0
Internet cafe	234	2.4	Online games		5328		18.5
Library	29	0.3	Online shopping		2418		8.4
Other	201	2.1	Information search		6230		21.7
			Browsing social networking sites (such as: Facebook, Twitter, Google+, LinkedIn, Blogger etc.)		8932		31.1
			Other		2973		10.3
Item				Mean		S.D
Age (years)				16.33		0.94
Average weekly online leisure activities (time in minutes, non-vacation)				8.65		7.34
Average weekly online leisure activities (time in minutes, vacation)				8.41		4.37