Table 1 Demographic, questionnaire and drug history information of adolescent and adult participants.

From: Acute effects of different types of cannabis on young adult and adolescent resting-state brain networks

 

Adolescent

Adult

Group differences

(n = 22)

(n = 24)

Gender, n (%)

  

χ2(1, N = 46) = 0.00, P = 1

 Female

11 (50%)

12 (50%)

 

 Male

11 (50%)

12 (50%)

 

Age in years, mean (SD)

17.2(0.44)

27.8 (1.04)

*** Adult > Adolescent

t[44] = −44.4, P < 0.001

Maternal education, n (%)

  

χ2(1, N = 46) = 0.047, P = 0.83

 Below undergraduate degree

8 (36%)

8 (33%)

 

 Undergraduate degree or above

14 (64%)

16 (67%)

 

Education, degree level and above

 Adults only

N/A

19 (79%)

N/A

 BDI, mean (SD)

8.7 (6.91)

5.3 (8.52)

t[44] = 1.77, P = 0.084

Use of alcohol every week, n (%)

  

*** Adult > Adolescent

χ2(1, N = 46) = 12.5, P < 0.001

 No

17 (77%)

6 (25%)

 

 Yes

5(23%)

18 (75%)

 

Use of cigarette/roll-ups every week, n (%)

  

χ2(1, N = 46) = 0.71, P = 0.40

 No

15 (68%)

19 (79%)

 

 Yes

7 (32%)

5 (21%)

 

Other illicit drug use, monthly use, n (%)

  

χ2(1, N = 46) = 0.27, P = 0.60

 No

21 (95%)

22 (92%)

 

 Yes

1 (5%)

2 (8%)

 

Cannabis use

Weekly, n (%)

  

χ2 (1, N = 46) = 0.46, P = 0.50

 No

2 (9%)

1 (4%)

 

 Yes

20 (91%)

23 (96%)

 

Cannabis frequency (dpw) mean, SD

2.55 (1.01)

2.79 (1.10)

t[44] = 0.787, P = 0.44

Hours since last use (users), mean (SD) [min-max]c

196(182)

128(62.4)

t[44] = 1.71, P = 0.09

Age of first ever use, mean (SD)

14.7 (0.93)

18.2 (2.62)

*** Adult>Adolescent

t[44] = -5.90, P < 0.001

Premorbid IQ (WTAR) mean (SD)

112 (12.1)

118 (6.12)

*Adult>Adolescent

t[44] = −2.18, P = 0.035

CUDIT, mean (SD)

9.95 (3.17)

7.21 (3.31)

**Adolescent>Adult

t[44] = 2.87, P = 0.006

DSM-5 severe CUD (users), n (%)

  

χ2(1, N = 46) = 1.12, P = 0.29

 No

21 (96%)

24 (100%)

 

 Yes

1 (4%)

0 (0%)

 
  1. Sociodemographic characteristics of the full sample minus the two subjects excluded for head motion (final n = 46). BDI is the Beck Depression Inventory. WTAR is Wechsler’s Test of Adult Reading. CUDIT is the Cannabis Use Disorder Inventory Test. Continuous data are presented as mean [SD], and categorical data are presented as n (%). Group differences are highlighted in the final column using appropriate tests for each data type (χ2 and t-tests; *P < 0.05, **P < 0.01, ***P < 0.001).
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