Table 1.

Comparing Content by Group in Study 1 and Study 2

Content area	Study 1		Study 2
	Control	Experimental	Control	Experimental
Names used for waterpipe	X	X		X
How does a waterpipe work	X	X		X
Flavoring added to tobacco	X	X
Origins, spread of, and subgroups who use waterpipe	X	X
Comparing amounts of CO, nicotine, tar, and aldehydes between waterpipe and cigarettes		X		X
Types and exposure levels of other harmful chemicals in waterpipe (e.g., naphthalene, flourene, acenapththene pyrene, phenantrene, and anthracene)a		X		X
Misleading labels about amount of tar in waterpipe		X		X
Health effects related to waterpipe use (e.g., heart disease, lung/mouth cancer, and infections due to sharing of mouthpiece)		X		X

Note. X = topic covered.

^aChemicals were associated with a common product (e.g., naphthalene was associated with moth balls).