Table 1b

Weighted Percentage of Tobacco and Product-Specific Initiation at W2 Among W1 Never Users

W1 (2013/14)W2 (2014/15)
P12M InitiationP30D InitiationFrequent P30D Initiation
YouthWeighted %95% CIWeighted %95% CIWeighted %95% CI
Never tobacco use 15.0 (14.2-15.8) 5.3 (4.7-5.8) 0.7 (0.5-0.9)
Never cigarette use4.6a,d (4.2-5.1)2.1a,d (1.8-2.4)0.4c (0.3-0.5)
Never ENDS* use15.8a,e,f,g (15.0-16.7)3.4a,e,f,g (2.9-3.8)0.5e,f (0.3-0.7)
Never hookah use5.3e,i (4.9-5.8)2.0e,i (1.8-2.3)0.2e (0.1-0.3)
Never cigar use4.6f,j (4.2-5.1)2.0f,j (1.8-2.3)0.1c,f,j (0.1-0.2)
Never smokeless use2.2d,g,i,j (1.9-2.5)0.9d,g,i,j (0.7-1.1)0.3j (0.2-0.4)
Young adults Weighted % 95% CI Weighted % 95% CI Weighted % 95% CI
Never tobacco use 15.2 (12.9-17.8) 8.1 (6.5-10.0) 1.4 (0.9-2.3)
Never cigarette use7.0a,b,d (6.0-8.2)4.6d (3.8-5.5)0.9b,c,d (0.6-1.3)
Never ENDS use23.8a,e,f,g (22.1-25.7)4.6g (3.8-5.5)0.8e,f,g (0.5-1.1)
Never hookah use9.8b,e,h,i (8.6-11.1)5.0i (4.2-5.9)0.2†b,e (0.1-0.3)
Never cigar use7.3f,h,j (6.4-8.4)4.1j (3.4-5.0)0.2†c,f (0.1-0.4)
Never smokeless use1.4d,g,i,j (1.1-1.8)0.8d,g,i,j (0.6-1.0)0.3d,g (0.2-0.4)
Adults 25+ Weighted % 95% CI Weighted % 95% CI Weighted % 95% CI
Never tobacco use 2.2 (1.7-2.9) 1.4 (1.0-1.9) 0.3† (0.1-0.6)
Never cigarette use1.2a,c,d (0.9-1.6)0.9a,d (0.6-1.3)0.2†(0.1-0.5)
Never ENDS use5.5a,e,f,g (5.1-5.9)1.4a,e,g (1.2-1.7)0.4e,f,g (0.3-0.5)
Never hookah use0.8e,h,i (0.7-1.0)0.4e,h (0.3-0.5)0.0†e,h (0.0-0.1)
Never cigar use2.0c,f,h,j (1.7-2.3)1.3h,j (1.1-1.6)0.2f,h (0.1-0.3)
Never smokeless use0.3d,g,i,j (0.2-0.4)0.3d,g,j (0.2-0.4)0.0†g (0.0-0.1)

  • W1 total group unweighted denominators (P12M initiation/P30D initiation/Frequent P30D initiation):

  • Never tobacco use – youth (ages 12-17): 8,913/8,840/8,799; young adults (ages 18-24): 1,466/1,459/1,451; adults 25+ (ages 25 and older): 2,247/2,247/2,243

  • Never cigarette use - youth: 10,383/10,379/10,372; young adults: 2,584/2,584/2,569; adults 25+: 3,190/3,191/3,182

  • Never ENDS use - youth: 10,676/10,62110,605; young adults: 4,195/4,139/4,141; adults 25+: 12,799/12,636/12,720

  • Never hookah use - youth: 11,101/11,093/11,067; young adults: 3,304/3,304/3,304; adults 25+: 14,543/14,549/14,543

  • Never cigar use - youth: 10,775/10,748/10,741; young adults: 3,153/3,155/3,120; adults 25+: 8,339/8,351/8,308

  • Never smokeless use - youth: 11,151/11,148/11,144; young adults: 5,783/5,786/5,777; adults 25+: 14,560/14,583/14,546

  • Analysis included youth, young adult, and adult 25+ W1 never tobacco or tobacco product users with data at W1 and W2. Respondent age was calculated based on age at W1. W2 single-wave weights were used to calculate estimates.

  • Never tobacco/product initiation is defined as not having used any tobacco or the specific product, even once or twice in lifetime.

  • 1) P12M initiation: Defined as a never user at W1 who used any tobacco or the specific product within the past 12 months at W2.

  • 2) P30D initiation (a subset of P12M initiation): Defined as a never user at W1 who used any tobacco or the specific product within the past 30 days at W2.

  • 3) Frequent P30D initiation (a subset of P30D initiation): Defined as a never user at W1 who used any tobacco or the specific product within the past 30 days on at least 20 or more days at W2.

  • All significance tests were done between product initiations only (not any tobacco initation).

  • adenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between cigarette and ENDS

  • bdenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between cigarette and hookah

  • cdenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between cigarette and cigar

  • ddenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between cigarette and smokeless

  • edenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between ENDS and hookah

  • fdenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between ENDS and cigar

  • gdenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between ENDS and smokeless

  • hdenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between hookah and cigar

  • idenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between hookah and smokeless

  • jdenotes significant difference at p<0.005 (Bonferroni corrected for ten comparisons) between cigar and smokeless

  • *Respondents were asked about “e-cigarettes” at W1 and “e-products” (i.e., e-cigarettes, e-cigars, e-pipes, and e-hookah) at W2 and Wave 3.

  • The logit-transformation method was used to calculate the 95% CIs.

  • †Estimate should be interpreted with caution because it has low statistical precision. It is based on a denominator sample size of less than 50, or the coefficient of variation of the estimate or its complement is larger than 30%.

  • Analyses were run on the W1 and W2 Public Use Files (https://doi.org/10.3886/ICPSR36498.v8).

  • CI, confidence interval; ENDS, electronic nicotine delivery system; P30D, past 30-day; P12M, past 12-month; W1, Wave 1; W2, Wave 2.