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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Addiction. 2013 Mar 21;108(6):1084–1094. doi: 10.1111/add.12108

Figure 3.

Figure 3

Modeled THC urine levels creatinine corrected based on the treatment assignment (VEN-XR, n=51; PBO, n=52) and HAMD score.

* When analyzed longitudinally, THC urine levels creatinine corrected were associated with HAMD score but the interaction between week and HAMD score was not significant (F6,354=0.96, p-value=0.45) so it was omitted from the final model. Additionally, week as a main effect was not significant (F6,354=0.96, p-value=0.45) and thus was omitted suggesting that the effect of HAMD on the THC urine levels is the same throughout the study.

** For each treatment group, THC urine levels were differently associated with HAMD score, demonstrated by significant interaction between HAMD and treatment (see Table 2).

*** When the groups were analyzed separately, in the VEN-XR group there was not a significant relationship between HAMD score and THC urine levels creatinine corrected (see Table 2). However, for the PBO group, THC was associated with HAMD score (see Table 2).