Skip to main content

Table 2 FAB (total and domain-specific scores) between all study groups (Cannabis users and controls) (n = 80)

From: Assessment of frontal lobe functions in a sample of male cannabis users currently in abstinence: correlations with duration of use and their functional outcomes

FAB domains

Assessment Criteria

Study groups, n (%)

Test value

p-value

Group I

(n = 20)

Group II

(n = 20)

Group III

(n = 20)

Group IV

(n = 20)

Similarity

(Conceptualization)

One correct

0

0

2 (10.0)

2 (10.0)

8.43 a

0.115

Two correct

0

2 (10.0)

2 (10.0)

4 (20.0)

Three correct

20 (100.0)

18 (90.0)

16 (80.0)

14 (70.0)

Lexical Fluency

(Mental Flexibility)

Less than 3 words

0

0

2 (10.0)

2 (10.0)

14.70 a

0.022 *

3–5 words

0

0

2 (10.0)

2 (10.0)

6–9 words

0

2 (10.0)

4 (20.0)

4 (20.0)

More than 9 words

20 (100.0)

18

12 (60.0)

12 (60.0)

Motor Series Test

(Programming)

3–5 correct consecutive series alone

1 (5.0)

2 (10.0)

6 (30.0)

9 (45.0)

11.27 a

0.009 *

6 correct consecutive series alone

19 (95.0)

18 (90.0)

14 (70.0)

11 (55.0)

Conflicting instructions

(Sensitivity to Interference)

More than 2 errors

0

1 (5.0)

0

0

4.12 a

0.775

1–2 errors

9 (45.0)

10 (50.0)

9 (45.0)

12 (60.0)

No errors

11 (55.0)

9 (45.0)

11 (55.0)

8 (40.0)

Go-No Go

(Inhibitory Control)

More than 2 errors

0

1 (5.0)

0

0

19.47 a

< 0.001 *

1–2 errors

2 (10.0)

9 (45.0)

11 (55.0)

14 (70.0)

No errors

18 (90.0)

10 (50.0)

9 (45.0)

6 (30.0)

Prehension behavior

(Environmental Autonomy)

Take hands without hesitation

0

1 (5.0)

2 (10.0)

2 (10.0)

4.37 a

0.645

Hesitate or ask what to do

5 (25.0)

8 (40.0)

7 (35.0)

8 (40.0)

Not take the examiner’s

hands

15 (75.0)

11 (55.0)

11 (55.0)

10 (50.0)

Total FAB Score

Not affected

15 (75.0)

7 (35.0)

7 (35.0)

3 (15.0)

15.83 b

0.001 *

Affected

5 (25.0)

13 (65.0)

13 (65.0)

17 (85.0)

  1. Group I: No cannabis use (Control); Group II: Cannabis use for 1–2 years; Group III: Cannabis use for 5–6 years; Group IV: Cannabis use for 9–10 years
  2. a. Fisher-Freeman-Halton Exact Test. b. Chi-square test
  3. *. Statistically significant at p < 0.05
  4. - Variables have been treated as separate categories