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. 2013 Oct 12;13:258. doi: 10.1186/1471-244X-13-258

Table 3.

Fixed effects regression of the Cannabis withdrawal symptoms

 
Model 1
 
 
Model 2
 
 
  Coef. SE P-value Coef. SE P-value
Days since last cannabis use
-0.130
0.035
0.000
0.051
0.053
0.339
Days since last alcohol or benzodiazepine use
-0.070
0.044
0.117
-0.031
0.048
0.523
Days since last opioid use
0.051
0.054
0.346
-0.061
0.044
0.175
Days since last CS use
-0.037
0.048
0.441
0.076
0.135
0.576
Days since last cannabis use squared
Not included
 
 
-0.006
0.004
0.118
Constant
11.731
1.174
0.000
10.147
1.527
0.000
Rho 0.641   0.000 0.589   0.000

Notes: CS: Central stimulants. Model 1: linear model. Model 2: quadratic model.