. Author manuscript; available in PMC: 2016 Jul 26.

Published in final edited form as: J Youth Adolesc. 2015 May 15;44(9):1752–1766. doi: 10.1007/s10964-015-0295-z

Table 3.

Correlations, means and standard deviation (SD) for main variables. These figures are based on the scales’ sum scores for cases with complete information on all measures (N = 976) and were calculated in Stata 11.

	1.AUDIT19	2.SMFQ14	3.Peers18	4.Peers13^§	5.SDQ	6.Alcohol13	7.Knowledge	8.Disclose	9.Solicit	10.Control

1	1.00
2	0.11^**	1.00
3	0.39^**	0.12^**	1.00
4	0.17^*	0.16^**	0.21^**	1.00
5	-0.02^ns	0.11^**	-0.04^ns	0.07^*	1.00
6	0.18^**	0.17^**	0.13^**	0.32^**	-0.01^ns	1
7	-0.27^**	-0.29^**	-0.25^**	-0.26^**	-0.01^ns	-0.24^**	1.00
8	-0.29^**	-0.29^**	-0.28^**	-0.24^**	-0.03^ns	-0.25^**	0.71^**	1.00
9	-0.04^ns	-0.10^*	-0.09^*	-0.13^**	0.01^ns	-0.13^**	0.42^**	0.41^**	1.00
10	-0.17^**	-0.03^ns	-0.19^**	-0.20^**	0.02^ns	-0.19^**	0.48^**	0.38^**	0.44^**	1.00

Mea	9.2	4.9	2.2	0.8	2.2	-0.003	28.1	13.5	13.7	14.2
SD	*5.4*	*4.5*	*1.5*	*1.1*	*0.8*	*1.1*	*5.8*	*3.4*	*2.8*	*3.6*

Note:

ns = not significant, *p < .05, **p<.001

^ȣ

main variables in our model

^§

confounder variables used to adjust our model

^¥

scales of the monitoring questionnaire

Following the approach followed by Saraceno and colleagues (2010), harmful drinking at age 13 was constructed using a Principal Component Analysis (PCA) approach. PCA extrapolates components with mean of 0 and standard deviation of 1

AUDIT: Alcohol Use Disorder Identification Test

SMFQ: Short Mood and Feeling Questionnaire

SDQ: Strengths and Difficulties Questionnaire – conduct problem subscale