TBI Group Mean (sd)

Non-TBI Group Mean (sd)

p (α = 0.01)

Age

36.16 (10.81)

36.91 (12.36)

0.72

Level of education¹

3 (1 - 5)

4 (1-6)

0.90^a

Lifetime number of convictions

23.33 (22.19)

19.64 (18.46)

0.42^a

Lifetime convictions for violent crimes

4.23 (3.72)

3.72 (3.46)

0.39^a

Lifetime convictions for non-violent crimes

19.10 (20.76)

16.00 (17.30)

0.51^a

IPAS-30 impulsive aggression scale

24.31 (9.97)

24.59 (6.89)

0.85^b

IPAS-30 instrumental aggression scale

20.21 (7.93)

20.75 (5.92)

0.66^b

IPAS-30 total score

73.99 (23.18)

74.03 (17.09)

0.99^b

RPQ proactive aggression scale

6.31 (5.96)

4.72 (4.55)

0.11

RPQ reactive aggression scale

10.78 (5.21)

8.17 (4.65)

0.005*

RPQ total score

17.09 (10.81)

12.87 (8.58)

0.021

BPAQ-r physical aggression scale

8.19 (3.66)

7.11 (3.58)

0.10

BPAQ-r verbal aggression scale

6.20 (2.41)

5.19 (2.26)

0.008^a*

BPAQ-r rage scale

6.80 (3.24)

5.17 (2.65)

0.003*

BPAQ-r hostility scale

7.32 (3.27)

6.63 (3.21)

0.24

BPAQ-r total score

28.90 (10.18)

24.09 (9.09)

0.007*

Mean SDAS total score from 4 ratings

3.40 (3.33)

3.08 (3.31)

0.47^a

IGT score block 4

4.24 (9.73)

1.77 (10.88)

0.19

IGT score block 5

1.88 (11.43)

3.40 (10.28)

0.45

IGT NET Total score

10.24 (31.73)

8.68 (35.59)

0.80