Outcome | Aware of short-fills | Used a short-fill in the past 30 days | |||||
Sample | Total n=4224 | Among all respondents (n=4224) | Among youth who vaped in the past 30 days (n=747) | ||||
% (n) | % (n) | AOR (95% CI) | P value | % (n) | AOR (95% CI) | P value | |
Model 1 | |||||||
Total | 23.0 (974) | 22.1 (150) | |||||
Vaping | |||||||
Never vaped | 57.5 (2429) | 18.4 (471) | 1 | Ref | – | – | – |
Ever vaped | 24.8 (1048) | 21.8 (219) | 0.93 (0.73 to 1.18) | 0.550 | – | – | – |
Vaped in the past 30 days | 17.7 (747) | 41.9 (284) | 2.14 (1.67 to 2.74) | <0.001 | 22.1 (150) | – | – |
Smoking | |||||||
Never smoked | 58.9 (2486) | 18.1 (471) | 1 | Ref | 5.3 (6) | 1 | |
Ever smoked | 33.9 (1433) | 27.0 (370) | 1.30 (1.05 to 1.61) | 0.015 | 19.5 (83) | 4.58 (1.60 to 13.14) | 0.005 |
Currently smoking | 7.2 (305) | 50.9 (133) | 3.13 (2.26 to 4.33) | <0.001 | 43.2 (61) | 13.7 (4.56 to 40.93) | <0.001 |
Model 2 | Among youth who vaped in the past 30 days (n=747) | Among youth who vaped in the past 30 days (n=747) | |||||
Nicotine concentration | |||||||
0% (0 mg/mL) | 40.7 (304) | 31.8 (88) | 1 | Ref | 11.9 (33) | 1 | Ref |
0.1%–1.9% (1–19 mg/mL) | 27.6 (206) | 54.1 (98) | 1.68 (1.06 to 2.69) | 0.029 | 32.5 (59) | 2.40 (1.32 to 4.39) | 0.004 |
2.0% (20 mg/mL) | 8.0 (60) | 45.8 (23) | 1.41 (0.74 to 2.69) | 0.294 | 31.7 (15) | 2.64 (1.14 to 6.13) | 0.024 |
≥2.1% (≥21 mg/mL) | 11.4 (85) | 61.7 (55) | 2.22 (1.23 to 3.99) | 0.008 | 40.8 (37) | 3.16 (1.53 to 6.49) | 0.002 |
Do not know | 12.3 (92) | 24.3 (24) | 0.59 (0.31 to 1.10) | 0.097 | 7.4 (6) | 3.16 (1.53 to 6.49) | 0.119 |
All analyses were weighted.
Model 1 was adjusted for age, sex, race/ethnicity, smoking, vaping.
Model 2 included only youth who had vaped in the past 30 days and was adjusted for age, sex, race/ethnicity, smoking and nicotine concentration.
AOR, adjusted OR; ITC, International Tobacco Control; Ref, reference.