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Zero-class in LCGA with categorical o... |
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I am running a latent class growth analysis of frequency of cannabis use from age 14 to 25, where the cannabis use variable is ordered categorical (five categories). I have specified an a priori zero-class like this: %c#2% ! zero class ; i@0 ; s@0; q@0 ; [i-q@0] ; However, the thresholds in this class are still the same as the other classes. Should I also set the thresholds to zero, and if so, how is this done? Thanks a lot. |
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For your 5-category outcome u, in class 2 you can say [u1$1@15 u1$2@16 u1$3@17 u1$4@18]; so that the probabilities of exceeding these high thresholds are zero while the thresholds are still ordered. Then do that for u2, u3, etc for the outcomes at all time points. |
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Thank you very much! This helped a great deal. |
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