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. Author manuscript; available in PMC: 2023 Jun 22.
Published in final edited form as: Prev Sci. 2019 Oct;20(7):1031–1042. doi: 10.1007/s11121-019-01031-3

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