Table 5.

Comparison of the distribution of individuals across the Levels of Physical Dependence in three studies.

Level of physical dependence	Level 0 None	Level 1 Wanting	Level 2 Craving	Level 3 Needing
Cypriot adolescents (n = 187)	14%	17%	16%	53%
American adolescents (n = 347)a	48%	26%	6%	20%
American adults (n = 422)b	17%	26%	17%	40%

^aDiFranza, Sweet, et al. (2011).

^bDiFranza et al. (2012).