Table 3.

Unadjusted Associations with Smokeless Tobacco Progression Among Baseline Experimenters

Characteristic	Smokeless Tobacco Use Between Baseline and Follow-up
	Did not Progress1 (N=102)5	Progressed2 (N=21)5	Percent Progressed 3	p-value4
Age in years, mean (SD)	15.9 (1.1)	15.6 (0.9)	-	0.32
Baseline perceived ST harm, median (IQR)	71 (53 – 86)	61 (47 – 80)	-	0.22
Follow-up perceived ST harm, median (IQR)	69 (52 – 93)	48 (27 – 70)	-	0.008*
Grade in school, n				0.66
9th	24	7	23%
10th	32	6	16%
11th	27	6	18%
12th	19	2	10%
Race/ethnicity, n				0.020*
Non-Hispanic White	44	16	27%
Hispanic/Latino	43	3	7%
Other	15	2	12%
Parental education, n				0.45
Neither parent with college degree	32	8	20%
≥1 parent with college degree	65	11	14%
Past month use, n
Cigarettes				0.86
No use in past 30-days	98	20	17%
Use in past 30-days	4	1	20%
E-Cigarettes				0.20
No use in past 30-days	85	15	15%
Use in past 30-days	17	6	26%
Cigars				0.53
No use in past 30-days	87	19	18%
Use in past 30-days	15	2	23%
Hookah				0.53
No use in past 30-days	87	19	18%
Use in past 30-days	15	2	12%
Any non-ST Tobacco				0.43
No use in past 30-days	72	13	15%
Use in past 30-days	30	8	21%
Alcohol				0.91
No use in past 30-days	48	10	17%
Use in past 30-days	50	11	18%
Any family ST use, n				0.90
No	47	10	18%
Yes	45	9	17%
Advertising receptivity, n				0.46
No	68	13	16%
Yes	29	8	22%
Tobacco warning labels, n				0.95
Less than sometimes	32	7	18%
See sometimes or more	66	14	18%
Friends who use ST, n				0.47
None	11	1	8%
Few or some	67	13	16%
Half or most	19	6	24%
ST Expectation, n				0.011*
No	39	2	5%
Yes	63	19	23%

^1.Reported ST experimenters at baseline and but did not reach threshold for progression at follow-up (past 30-day use and used ≥20 times)

^2.Progressed from ST experimentation (baseline) to experienced ST use (follow-up)

^3.Incidence of progression in ST use at follow-up among all baseline experimenters in the category (only applicable for categorical variables)

^4.Chi-square test (categorical variables), T-test (age), or Mann-Whitney U-test (ST harm score) for difference between those who did and did not progress in ST use

^5.Number of observations for some variables may add to less than the total due to missing data

Abbreviations: IQR = interquartile range; SD = standard deviation; ST = smokeless tobacco

^*No longer statistically significant under the Benjamini-Hochberg procedure for multiple hypothesis tests