Table 2.

Prevalence of Internet gaming disorder by population type

	General populations: prevalence range (%) [# of studies]	Clinical populations: prevalence range (%) [# of studies]	Undergoing intervention (severe): prevalence range (%) [# of studies]
WHO region
African	No studies found	No studies found	No studies found
Eastern Mediterranean	9.20 [1]	No studies found	No studies found
European	0.21–33.33 [25]	9.38–91.00 [2]	68.60 [1]
Region of the Americas	0.25–38.90 [11]	3.20 [1]	76.60 [3]
South-East Asia	No studies found	No studies found	No studies found
Western Pacific	1.20–57.50 [22]	4.00–69.00 [7]	50.42–79.25 [2]
Multiple regions	0.56–5.28 [2]*	No studies found	No studies found
Gender/sex
Male	0.21–57.50 [25]	33.91–91.00 [3]	50.42–79.25 [2]
Female	0.25–26.09 [21]	69.00 [1]	No studies found
Age groups
Children (0–19 years old)	0.26–38.00 [20]	7.93–11.44 [2]	68.60–79.25 [2]
Adolescents (10–19 years old)	0.26–38.00 [17]	7.93–11.44 [2]	68.60–79.25 [2]
Adults (18 years and older)	0.21–55.77 [27]	3.20–69.00 [6]	76.60 [3]

General: Populations that were not seeking treatment for GD or IGD, did not have GD or IGD at recruitment, and were not undergoing treatment for GD or IGD. Clinical: Populations who sought treatment, and populations with GD or IGD at recruitment. Severe: Populations undergoing treatment for GD or IGD. WHO World Health Organization

^#Number

*Studies covered multiple geographic regions