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Table 2 Descriptive statistics for dependent model variables (N = 396)

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

  T1 T2 T3 T4 T5
Cue-induced craving      
 Mean 1.27 1.29 1.37 1.50 1.36
 (SD) (.59) (.62) (.73) (.91) (.70)
 Skewness 3.37 2.94 2.63 2.01 2.43
 (SD) (.19) (.18) (.17) (.16) (.16)
Cognitive craving      
 Mean 1.38 1.38 1.44 1.57 1.50
 (SD) (.70) (.81) (.81) (.95) (.85)
 Skewness 2.67 2.85 2.39 1.81 1.88
 (SD) (.19) (.18) (.17) (.17) (.17)
  1. For both measures: min = 1, max = 5