TABLE 1—

Prevalence of Current Waterpipe Smoking Among US Young Adults and Adolescents: National Youth Tobacco Survey, 2011–2014

	High School		Middle School
Year	Cigarette Smoking, Past 30 Day, % (95% CI)	Waterpipe Smoking, Past 30 Days, % (95% CI)	Cigarette Smoking, Past 30 Days, % (95% CI)	Waterpipe Smoking, Past 30 Days, % (95% CI)
2011	15.8 (13.7, 18.1)	4.1 (3.4, 5.0)	4.3 (3.5, 5.2)	1.0 (0.8, 1.4)
2012	14.0 (12.5, 15.7)	5.4 (4.6, 6.3)	3.5 (2.8, 4.3)	1.3 (1.0, 1.7)
2013	12.7 (11.3, 14.2)	5.2 (4.6, 6.0)	2.9 (2.3, 3.6)	1.1 (0.8, 1.5)
2014	9.2 (8.1, 10.4)	9.4 (8.2, 10.7)	2.5 (2.1, 3.0)	2.5 (2.0, 3.0)

Note. CI = confidence interval.