Table 5.

Prevalence rates of Internet addiction in nationally representative surveys of over 3,000 respondents

First author, year	Country	N	Ages	Instrument	%
Kim, 2016	Korea	6510	18-64	Internet Addiction Test	0.6
Bakken, 2009	Norway	3399	16-74	Young Diagnostic Questionnaire	1.0
Rumpf, 2014	Germany	15023	14-64	Compulsive Internet Use Scale	1.0
Tsitsika, 2014	7 European countries *	13284	14-17	Internet Addiction Test	1.2
Mak, 2014	6 Asian countries**	5366	12-18	Internet Addiction Test	1.2-4.9
Johanssson, 2004	Norway	3237	12-18	Young Diagnostic Questionnaire	2.0
Müller, 2017	Germany	9293	12-19	Assessment of Internet and Computer Game Addiction	2.6
Ha, 2014	Korea	56086	12-18	Korean-Internet addiction short form	2.8
Yoo, 2014	Korea	73328	12-19	Internet Addiction Self-Diagnosis Brief Scale	3.0
Macur, 2016	Slovenia	6282	18-95	Problematic Internet Use Questionnaire-Short Form	3.1
Durkee, 2012	11 primarily European countries***	12395	Mean 15	Young Diagnostic Questionnaire	4.4
Li, 2014	China	24013	7-15	Young Diagnostic Questionnaire	6.3
Wang, 2013	China	95322	13-24	Diagnostic Questionnaire for Internet Addiction	7.5
Mihara, 2016	Japan	100050	12-19	Young Diagnostic Questionnaire	7.9
Cao, 2011	China	17599	10-24	Young Internet Addiction Scale	8.1
Lin, 2011	Taiwan	3616	College	Chen Internet Addiction Scale – Revised	15.3
Ahmadi, 2014	Iran	4342	Mean 16	Young Internet Addiction Scale	22.2

^*Countries were: Spain, Romania, Poland, Greece, The Netherlands, Germany, and Iceland.

^**Countries were: China, Hong Kong, Japan, South Korea, Malaysia, and Philippines.

^***Countries were: Austria, Estonia, France, Germany, Hungary, Ireland, Israel, Italy, Romania, Slovenia, and Spain.