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Table 4 Four-way decomposition of the total effect of marijuana use on fatal 2-vehicle crash initiation in the presence of alcohol

From: Direct and indirect effects of marijuana use on the risk of fatal 2-vehicle crash initiation

Component

Log (Odds Ratio)

95% Confidence Interval

Effect Proportion

P value

Total Effect

0.499

0.31, 0.66

1.00

< 0.001

Controlled Direct Effect

0.257

0.16, 0.36

0.515

< 0.001

Reference Interaction

0.086

−0.04, 0.21

0.173

0.181

Mediated Interaction

0.039

−0.02,0.10

0.078

0.205

Pure Indirect Effect

0.117

0.05, 0.18

0.234

0.001