Table 3.
Item-response probabilities for a five latent status model of college student tobacco and nicotine product use (M-PACT, waves 1 through 4; n = 5,482)
| Latent status name | Non-users | Poly-cigarette users | Poly-experimenters | Hookah experimenters | E-cigarette & hookah experimenters |
|---|---|---|---|---|---|
| Class membership probabilities | |||||
| Wave 1 | .3030 | .1102 | .2588 | .1767 | .1512 |
| Wave 2 | .2797 | .1426 | .2430 | .1809 | .1537 |
| Wave 3 | .2617 | .1651 | .2351 | .1745 | .1636 |
| Wave 4 | .2537 | .1737 | .2314 | .1653 | .1760 |
| Item-response probabilities | |||||
| Ever cigarette use | .0000 | .9831 | .9875 | .5218 | .2287 |
| Ever cigar use | .0000 | .8511 | .7081 | .3546 | .1749 |
| Ever smokeless use | .0000 | .9806 | .0000 | .0534 | .0271 |
| Ever e-cigarette use | .0000 | .8762 | .9324 | .0000 | .9418 |
| Ever hookah use | .0000 | .9414 | .8858 | .6250 | .7075 |
| Current cigarette use | .0000 | .6578 | .4923 | .0717 | .0024 |
| Current cigar use | .0000 | .2978 | .1905 | .0462 | .0383 |
| Current smokeless use | .0000 | .2580 | .0000 | .0056 | .0036 |
| Current e-cigarette use | .0000 | .4366 | .3703 | .0000 | .1846 |
| Current hookah use | .0000 | .3398 | .3385 | .0779 | .1862 |
Item-response probabilities were constrained to be equal across waves. Item-response probabilities > .6 in italics to facilitate interpretation of latent statuses. The probability of a “no” response can be calculated by subtracting the item-response probabilities from 1