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Table 4 Multiple regression testing the effects of predictor variables on the normalized composite neuropsychological performance score.

From: Character pathology and neuropsychological test performance in remitted opiate dependence

Subjects

Predictor

Standardized Coefficient

R2

ANOVA

All

Composite MCMI

β = -0.572;

0.327

F = 25.312

  

t = -5.031;

 

df = 1, 52

  

p < 0.001

 

p < 0.001

MM + PA

Composite MCMI

β = -0.429;

0.185

F = 3.52;

  

t = -2.65;

 

df = 2, 31;

  

p = 0.013

 

p = 0.042

 

Age at first drug use

β = -0.01;

  
  

t = -0.061;

  
  

p = 0.952

  

MM + PA

Composite MCMI

β = -0.434;

0.188

F = 3.94;

  

t = -2.8;

 

df = 2, 34;

  

p = 0.008

 

p = 0.029

 

Years of heroin addiction

β = 0.003;

  
  

t = 0.022;

  
  

p = 0.982

  

MM + PA

Composite MCMI

β = -0.398;

0.163

F = 0.2.82;

  

t = -2.34;

 

df = 2, 29;

  

p = 0.026

 

p = 0.076

 

Estimated dollars spent daily on heroin

β = 0.085;

  
  

t = 0.50;

  
  

p = 0.622

  

MM + PA

Composite MCMI

β = -0.437;

0.195

F = 4.12;

  

t = -2.84;

 

df = 2, 34;

  

p = 0.008

 

p = 0.025

 

Years of MMT

β = -0.083;

  
  

t = -0.536;

  
  

p = 0.596

  

MM + PA

Composite MCMI

β = -0.344;

0.196

F = 3.41;

  

t = -1.97;

 

df = 2, 28;

  

p = 0.058

 

p = 0.047

 

Highest dose of methadone

β = 0.21;

  
  

t = 1.21;

  
  

p = 0.238

  
  1. MM – Methadone Maintained, PA – Protracted Abstinence, MCMI – Millon Clinical Multi-axial Inventory.