Table 1 Proportions and means/standard deviations for sample demographics by phenotype.

From: The propensity to sign-track is associated with externalizing behavior and distinct patterns of reward-related brain activation in youth

 

non-ST (n = 21)

ST (n = 19)

Overall (N = 40)

Sex

Female

8 (38%)

8 (42%)

16 (40%)

Male

13 (62%)

11 (58%)

24 (60%)

Age: mean (SD)

9.7 (0.91)

9.5 (0.96)

9.6 (0.93)

Race/ethnicity

White

16 (76%)

10 (53%)

26 (65%)

Black

0 (0%)

6 (32%)

6 (15%)

Latino, Latina

2 (10%)

1 (5%)

3 (8%)

Native American

1 (5%)

1 (5%)

2 (5%)

Multiple

2 (10%)

1 (5%)

3 (8%)

Household income

 < $5000–$11,999

0 (0%)

3 (16%)

3 (8%)

$12,000–$24,999

0 (0%)

2 (11%)

2 (5%)

$25,000–$49,999

3 (14%)

3 (16%)

6 (15%)

$50,000–$99,999

3 (14%)

4 (21%)

7 (18%)

 > $100,000

14 (67%)

6 (32%)

20 (50%)

Parent highest education

 < High School

0 (0%)

1 (5%)

1 (2%)

High School/GED

1 (5%)

4 (21%)

5 (12%)

Some College

2 (10%)

3 (16%)

5 (12%)

Associates Degree

2 (10%)

2 (11%)

4 (10%)

Bachelor’s Degree

9 (43%)

5 (26%)

14 (35%)

Post-Graduate Degree

7 (33%)

3 (16%)

10 (25%)

Parent marital status

Married/Living Together

21 (100%)

13 (68%)

34 (85%)

Divorced/Separated

0 (0%)

1 (5%)

1 (2%)

Never Married

0 (0%)

4 (21%)

4 (10%)

  1. Sample demographics divided by phenotypic group (ST and non-ST) and total Participants (Overall). Numbers indicate frequencies with percentages in parentheses unless otherwise indicated as a mean with standard deviation in parentheses.
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