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. Author manuscript; available in PMC: 2020 May 15.
Published in final edited form as: Biol Psychiatry. 2018 Dec 4;85(10):863–871. doi: 10.1016/j.biopsych.2018.11.021

Table 1:

Demographic Characteristics of Participants at Baseline with Usable ERP data

Reward Positivity Analyses Late Positive Potential Analyses
Waitlist (N = 58) Treatment (N = 60) Group Comparison Waitlist (N = 55) Treatment (N = 44) Group Comparison
Sex (% male) 64 65 X21= 0.02, p=0.89 67 64 X21= 0.14, p=0.71
Race
 % White 80 78 X22= 0.39, p=0.82 79 80 X22= 0.42, p=0.81
 % African American 9 12 9 11
 % Other 12 10 13 9
Age y, mean (SD) 5.83 (0.80) 5.46 (0.84) t116= 2.44, p=0.02 5.79 (0.84) 5.64 (0.81) t97= 0.83, p=0.41
Preschool Feelings Checklist (PFC) scale score, mean (SD) 41.76 (11.82) 37.73 (9.17) t116= 2.07, p=0.04 42.04 (11.45) 37.32 (10.22) t97= 2.14, p=0.04
Anhedonia sum score 1.40(1.11) 1.38(1.01) t116= .07, p=0.95 1.45(1.12) 1.32(1.05) t97= .62, p=0.54
% Co-morbid externalizing disorders 55 47 X21= 0.85, p=0.36 60 46 X21= 2.08, p=0.15
% on non-antidepressant medications 2 7 X21= 1.77, p=0.18 2 2 X21= 0.03, p=0.87
Income-to-Needs, mean (SD) 2.85 (1.38) 2.99 (1.26) t116= −0.57, p=0.57 2.86 (1.34) 3.04 (1.25) t97= −0.68, p=0.50

Abbreviations: SD = standard deviation; % = percent; t=t-test test statistic; p=p-value; X2=Chi-Square test statistic