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Table 3 Spearman and Pearson correlations between the model variables

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

  1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.
1. Sex -                 
2. Age -.04 -                
3. Education -.09 -.16 -               
4. Ethnicity -.06 -.08 -.17 -              
5. DRD2 Taq1A -.10 .10 -.05 -.06 -             
6. DRD4 VNTR .13 -.02 -.03 .04 -.04 -            
7. OPRM1 A118G .09 .00 .06 -.05 -.02 .06 -           
8. Parental exposure .08 .05 -.12 -.01 -.04 .03 .02 -          
9. Cue Craving T1 .11 .04 -.04 .02 .13 .04 .08 .19 -         
10. Cue Craving T2 .15 .15 .01 -.08 .15 .07 .12 .19 .53 -        
11. Cue Craving T3 .24 .08 -.01 -.05 .15 -.02 -.01 .20 .50 .67 -       
12. Cue Craving T4 .20 .13 .02 -.06 .02 -.09 .09 .11 .29 .53 .72 -      
13. Cue Craving T5 .14 .03 -.04 .04 -.06 -.05 -.01 .13 .29 .26 .35 .58 -     
14. Cog Craving T1 .13 .09 -.07 -.02 .18 .03 .08 .25 .82 .62 .58 .33 .19 -    
15. Cog Craving T2 .08 .12 .02 -.03 .19 .06 .12 .20 .42 .91 .72 .53 .25 .57 -   
16. Cog Craving T3 .16 .04 -.02 .02 .11 -.01 .00 .15 .43 .59 .89 .74 .32 .54 .67 -  
17. Cog Craving T4 .19 .13 -.03 -.07 .06 -.12 .08 .15 .35 .56 .68 .93 .55 .46 .59 .74 -
18. Cog Craving T5 .10 .00 .01 .03 -.04 .01 .05 .11 .37 .19 .43 .59 .77 .36 .22 .51 .65
  1. ‘Cue’ refers to Cue-induced and ‘Cog’ refers to Cognitive; Correlations with p < .05 are in italics, correlations with p < .01 are in boldface. Spearman correlations are underlined, all other correlations are Pearson correlations.