Additional file 1: of Parental smoke exposure and the development of nicotine craving in adolescent novice smokers: the roles of DRD2, DRD4, and OPRM1 genotypes

Questionnaire. (DOC 176 kb

Correlations Depressed Group (N = 109) and Non-depressed Group (N = 289).

<p>Correlations Depressed Group (N = 109) and Non-depressed Group (N = 289).</p

Correlations Total Group (<i>N</i> = 398).

<p>Correlations Total Group (<i>N</i> = 398).</p

Mediation Model.

<p>Standardized estimates of the indirect effects on the depressive symptoms (N = 398). Only significant effects are shown (* <i>p</i> < .05, *** <i>p</i> < .001). Estimates apply to the total sample (<i>N</i> = 398).</p

Direct Effects for the Total Sample.

<p>Standardized estimates of the direct effects on the cognitive emotion regulation and depressive symptoms. Only significant effects (* <i>p</i> < .05, ** <i>p</i> < .01, *** <i>p</i> < .001) within the total sample (<i>N</i> = 398) are shown.</p

Logistic regression analyses family smoking at T1 predicting smoking onset at T5 and the moderating role of <i>DRD2</i>, <i>DRD4</i>, and <i>DAT1</i> genotypes for <i>study 2</i>.

<p><i>Note</i>. gender: 1 = boy, 2 = girl; OR = Odds Ratio; 95% CI = 95% Confidence Interval.</p

Baseline Characteristics of <i>Study 1</i> and <i>Study 2</i>.

<p>Values are numbers (percentage) unless stated otherwise.</p><p><i>Note.</i></p>*<p>Low = preparatory school for technical and vocational training, Middle = intermediate or general education, high = preparatory college and university education.</p

<i>P</i>earson's Correlations among the study variables of <i>study 1</i> and <i>study 2</i>.

<p><i>Note.</i> Correlations for <i>study 1</i> can be found under the diagonal and for <i>study 2</i> above the diagonal;</p>*<p><i>p</i><.05,</p>**<p><i>p</i><.01,</p>***<p><i>p</i><.001.</p

Logistic regression analyses friends smoking at T1 predicting smoking onset at T5 and the moderating role of <i>DRD2</i>, <i>DRD4</i> and <i>DAT1</i> genotypes for <i>study 1</i>.

<p><i>Note</i>. gender: 1 = boy, 2 = girl; OR = Odds Ratio; 95% CI = 95% Confidence Interval.</p

Logistic regression analyses family smoking at T1 predicting smoking onset at T5 and the moderating role of <i>DRD2</i>, <i>DRD4</i> and <i>DAT1</i> genotypes for <i>study 1</i>.

<p><i>Note</i>. gender: 1 = boy, 2 = girl; OR = Odds Ratio; 95% CI = 95% Confidence Interval.</p