Skip to main content
. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Psychopharmacology (Berl). 2020 Aug 15;237(12):3615–3624. doi: 10.1007/s00213-020-05640-7

Table 1.

Sample demographics.

Variable Group
[mean (standard deviation) [range] or %]
Non-Nicotine Nicotine Sig
Total N 26 37
Age 18.31 (1.52) [16–22] 19.03 (1.32) [17–22] 0.05
% Male 57.69% 72.97% 0.21
% White 50.00% 45.90% 0.75
% Hispanic 50.00% 40.50% 0.46
Education Years Completed 12.08 (1.55) [9–16] 12.59 (1.19) [10–15] 0.14
DASS-21 Depression Standard Score 2.04 (2.07) [0–7] 4.24 (4.73) [0–20] 0.03
DASS-21 Anxiety Standard Score 2.12 (2.03) [0–7] 4.00 (3.15) [0–14] 0.01
DASS-21 Stress Standard Score 2.46 (2.64) [0–10] 5.22 (4.00) [0–14] <0.01
Age of Onset of Nicotine Use 16.50 (1.60) [13–18] n=8 16.38 (1.91) [11–19] 0.87
Days Since Last Nicotine Use 68.50 (78.86) [3–254] n=8 7.19 (9.19) [0–30] <0.01
Nicotine Use Episodes Previous Year 1.54 (3.04) 1 [0–10] 1109.16 (2289.36) [17–10272] 0.02
Age Onset Cannabis Use 16.45 (2.73) [10–19] n=11 15.70 (1.75) [11–18] 0.28
Age Onset Regular Cannabis Use 17.75 (1.04) [16–19] n=8 17.15 (1.70) [13–21] n=33 0.35
Days Since Last Cannabis Use 12.82 (22.90) [0–66] n=11 77.76 (332.68) [0–2016] 0.52
Cannabis Use Episodes Previous Year 37.69 (82.12) [0–374] 312.73 (380.08) [3–1855] <0.01
Age Onset Alcohol Use 16.06 (2.41) [8–18] n=16 15.59 (2.41) [9–20] 0.52
Days Since Last Alcohol Use 62.56 (178.75) [1–730] n=16 16.49 (37.96) [0–210] 0.14
Alcohol Drinks Per Drinking Day Previous Year 3.38 (7.06) [0–35] 5.03 (4.02) [2–25] 0.25
Alcohol Drinking Days Per Month Previous Year 1.92 (3.32) [0–13] 6.11 (5.74) [0–21] 0.01