Table 2 Inter-correlations of predictors (age 15; Study 1 & 2), substance use (age 15 & 24; Study 1), and mental health (age 16 & 19; Study 2)

Sense of coherence (SOC) 15

-

Neuroticism (N) 15

−.64^****

-

Extraversion (E) 15

−.03

.05

-

General self-efficacy (GSE) 15

.47^****

−.26^****

.32^****

-

Tobacco use (TOB) 15

−.22^****

.19^***

.22^****

−.04

-

Alcohol use (ALC) 15

−.10^*

.13^**

.29^****

.03

.50^****

-

Cannabis use (CAN) 15

−.07

.11^*

.17^***

−.02

.46^****

.40^****

-

Tobacco use (TOB) 24

−.31^****

.21^**

.18^**

−.09

.41^****

.22^**

.15^*

-

Alcohol use (ALC) 24

−.15^*

.01

.08

−.04

−.02

.35^****

.11

.19^**

-

Cannabis use (CAN) 24

−.11

.07

.21^**

−.12

.10

.05

.20^**

.38^****

.31^***

-

Mental health (SCL) 16

−.49^****

.43^****

.09

−.13^**

.22^****

.18^***

.04

.21^**

.11

.07

-

Mental health (SCL) 19

−.39^****

.32^****

.03

−.18^**

.12

.07

.04

.10

.01

.05

.57^****