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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