Attributes | Model A | Attributes | Model B | ||
CL (1) | NL (2) | CL (3) | NL (4) | ||
Flavour | Flavour | ||||
Flavour (ordinal) | 0.497** (0.112) | 0.280*(0.133) | Tobacco (omitted) | – | – |
– | – | Menthol | 0.443*(0.209) | 0.270*(0.136) | |
– | – | Fruit/sweets/beverage | 0.980** (0.232) | 0.601*(0.250) | |
Device type | Device type | ||||
Cig-like e-cigs (omitted) | – | – | Cig-like e-cigs (omitted) | – | – |
e-GO/Mods/APVs | 0.232† (0.131) | 0.168* (0.083) | e-GO/Mods/APVs | 0.221† (0.132) | 0.171* (0.087) |
Warning | Warning | ||||
Warning (ordinal) | −0.143† (0.078) | −0.072† (0.044) | No warning or FDA messages (omitted) | – | – |
FDA/CTP Statement or MarkTen | −0.328**(0.127) | −0.178†(0.100) | |||
n | 12 525 | 12 525 | n | 12 525 | 12 525 |
*p<0.05.
**p<0.01.
†p<0.1.
Samples were weighted to be representative of a general youth population. Clustered SE are in parentheses. Race/Ethnicity was controlled for using a group of dummy variables with White, Non-Hispanic as omitted category. Model A: CL Hausman-McFadden χ2=7.78, p=1.00 . Model B: CL Hausman-McFadden χ2 =23.40, p=0.50; NL χ2 =5.09, p=0.08.
CL, conditional logit; CTP, Center for Tobacco Products; ENDS, electronic nicotine delivery systems; FDA, Food and Drug Administration; NL, nested logit.