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st: xtmelogit question

From   Jennifer Manuel <[email protected]>
To   [email protected]
Subject   st: xtmelogit question
Date   Sat, 26 Jan 2008 18:28:19 -0500


I am estimating a mixed-effects logistic regression model using xtmelogit. I'm examining the impact of two case management models on medication adherence among 198 individuals who were followed over a 3-year period. In estimating the model, I am getting the message "initial values not feasible" r(1400). The output is below. I've searched the listserv and have tried to use starting values from a simpler model using the from() option, but I still get the same error message. I would be grateful for any advice on what I'm doing wrong.

. xtmelogit nonadherencemo interval trtcond txBYintvl || id: interval, cov(un) var

Refining starting values:

initial values not feasible

Thank you,

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