Characteristic | tDCS group (n = 39) | Sham group (n = 42) | Statistic^{b} | p value |
---|---|---|---|---|

Sex | ||||

Female | 24 | 21 | χ^{2} = 1.09 | 0.30 |

Male | 15 | 21 | ||

Age | 20.26 years (4.13 years) | 20.17 years (2.36 years) | t = −0.12 | 0.90 |

Race | ||||

Caucasian | 17 | 19 | χ^{2} = 0.02 | 0.88 |

Non-Caucasian | 22 | 23 | ||

Grade point average^{c} | 3.55 (0.27) | 3.47 (0.33) | t = −1.18 | 0.24 |

Social adversity | 0.72 (1.15) | 1.45 (1.67) | t = 2.32 | 0.02 |

Variety of offending | 17.36 (6.25) | 16.38 (6.22) | t = −0.71 | 0.48 |

Aggression | 9.92 (4.97) | 8.86 (4.48) | t = −1.02 | 0.31 |

Psychopathy | 23.33 (11.85) | 23.02 (12.65) | t = −0.11 | 0.91 |

Lack of premeditation | 1.59 (0.49) | 1.63 (0.49) | t = 0.38 | 0.71 |

Sensation-seeking | 2.89 (0.65) | 2.88 (0.65) | t = −0.07 | 0.94 |

Anxiety | 38.79 (8.53) | 38.43 (9.25) | t = −0.19 | 0.85 |

Self-control | 37.05 (6.69) | 35.52 (7.18) | t = −0.99 | 0.33 |

↵

Data for continuous variables are presented as mean (SD).^{a}↵

Differences in baseline scores were compared using two-tailed independent^{b}*t*test and χ^{2}tests.↵

For eight individuals whose grade point averages were missing, mean imputation was conducted. Missing values were replaced with the mean of the observed data as suggested in Kahan et al. (2014).^{c}