Table 4.

Correlations between individual items for the FTQ for waterpipe using adolescents

Item	Number of waterpipes smoked per day	Inhale while smoking water pipe	Difficult to refrain from using tobacco in places where it is forbidden	Smoke waterpipe more during the first hours after waking up than the rest of the day	Tobacco use during first 2 hours of waking
Overall score	0.26903	0.70439	0.48380	0.72656	0.72222
Number of water pipes smoked per day	1.00000	-0.10396	0.10624	-0.00264	-0.00083
Inhale while smoking water pipe		1.00000	0.19435	0.34081	0.31940
Difficult to refrain from using tobacco in places where it is forbidden			1.00000	0.08432	0.10189
Smoke water pipe during the first hours after waking up than you do during the rest of the day				1.00000	0.77133
Tobacco use during first 2 hours of waking					1.00000