Substance
|
Total sample
Mean (SD)
|
Total sample
Median
|
Adolescents with immigration background
Mean (SD)
|
Adolescents without immigration background
Mean (SD)
|
t value
|
p-value
|
95 % confidence interval for the difference
|
---|
Alcohol
|
(N = 7810)
|
12.87 (1.95)
|
13.00
|
12.75 (2.33)
|
12.90 (1.83)
|
2393
|
.017
|
.027–.271
|
Tobacco
|
(N = 3153)
|
13.28 (1.86)
|
14.00
|
13.13 (2.11)
|
13.33 (1.76)
|
2457
|
.014
|
.040–.357
|
Cannabis
|
(N = 1156)
|
14.33 (1.07)
|
14.00
|
13.13 (2.11)
|
14.33 (1.04)
|
−.493
|
.622
|
−.177–.108
|
- Includes only cases with a “positive” lifetime prevalence