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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Addict Behav. 2014 Aug 7;40:16–20. doi: 10.1016/j.addbeh.2014.07.030

Table 3.

Parameter Estimates from the GEE Model of Craving Outcomes

Variable Exp(b) SE z P
Reduced Model
 Centered linear time .77 .09 −2.16 .03
 Centered quadratic time 1.06 .04 1.60 .11
 Mindfulness hours .92 .03 −2.36 .02
Full Model
 Linear time .62 .08 −3.90 <.001
 Quadratic time 1.12 .04 2.93 .003
 Mindfulness hours .97 .04 −.90 .37
 Linear time x Mindfulness hours .63 .05 −5.49 <.001
 Quadratic time x Mindfulness hours 1.10 .02 4.46 <.001

Notes. Exp(b) = exponentiated coefficient. SE = Semi-robust standard error. z = z-score for the parameter.