When it comes to assessing the impact of e-cigarettes, estimates of device prevalence matter: the BIDI Stick disposable device

Table 3 Prevalence estimates for the BIDI® Stick brand among a probability-based sample of youth

	13–17 years		13–14 years		15–17 years
	W% [95% CI]	EWNP [95% CI] ‡	W% [95% CI]	EWNP [95% CI] ‡	W% [95% CI]	EWNP [95% CI] ‡
Has ever used the brand^a	0.91 [0.44–1.68]	190,000 [90,000–350,000]	0.32 [0.04–1.32]	20,000 [0000–100,000]	1.29 [0.58–2.51]	160,000 [70,000–320,000]
Has used the brand in the past 30 days^b	0.04 [0.00–0.38]	< 10,000	0.00^†	< 10,000	0.07 [0.00–0.63]	< 10,000

W% weighted percentage, CI confidence interval, and EWNP estimated weighted number of persons
^‡Rounded down to the nearest 10,000 persons
^†95% CI not reported
^aEven once or twice
^bOn at least one of the past 30 days

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