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Table 7 Multiple stepwise regression analysis to detect predictors affecting Addiction Intensity Scale (AIS) scoring

From: Does type and number of used substances affect the severity of illness in patients with substance use disorders?

Model

 

Unstandardized coefficients

R

R2

P value

B

Std. error

1

Constant

Overall number of substances

10.8

1.2

0.7

0.2

0.492

0.242

< 0.001*

2

Constant

Overall number of substances

Educational

9.1

1.14

0.19

1

0.21

0.08

0.534

0.285

< 0.001*

0.017*

  1. Multiple stepwise linear regression analysis