Table 2.
Five-Class Model: Parameter Estimates (Item-Response Probabilities)
| Class 1: 60% (n = 1,574) | Class 2: 10% (n = 265) | Class 3: 10% (n = 269) | Class 4: 13% (n = 331) | Class 5: 7% (n = 185) | |
|---|---|---|---|---|---|
| No/limited use | Snuff/snus | Cigarillos and hookah | Cigarette smokers | Poly-users | |
| Cigarettes: past 30 days | .050 | .331 | .150 | .967 | .819 |
| Snuff/chew: ever | .030 | .885 | .105 | .008 | .801 |
| Snus: ever | .011 | .660 | .036 | .056 | .775 |
| E-cigs: ever | .009 | .035 | .041 | .281 | .379 |
| Hookah: ever | .179 | .407 | .771 | .419 | .810 |
| Cigarillos/little cigars: ever | .064 | .587 | .884 | .322 | .808 |