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. Author manuscript; available in PMC: 2022 May 15.
Published in final edited form as: Biol Psychiatry. 2021 Jan 20;89(10):1012–1022. doi: 10.1016/j.biopsych.2021.01.006

Table 1.

Descriptive statistics for the drink and cannabis index measures.

Measure Total Sample Men Women
Mean (SD) Range Mean (SD) Range Mean (SD) Range
Drink Index 2.79 (0.97) 0–4.75 3.17 (0.91) 0–4.75 2.52 (0.92) 0–4.50
 Frequency 2.82 (0.83) 0–5.00 3.03 (0.85) 0–5.00 2.67 (0.78) 0–4.00
 Amount 1.59 (0.81) 0–5.00 1.84 (0.86) 0–5.00 1.42 (0.72) 0–5.00
 Max drinks 3.39 (1.22) 0–6.00 3.91 (1.13) 0–6.00 3.01 (1.15) 0–6.00
 Intoxications 3.32 (1.93) 0–6.00 3.86 (1.83) 0–6.00 2.93 (1.91) 0–6.00
Cannabis Index 1.72 (1.76) 0–5.00 2.31 (1.85) 0–5.00 1.30 (1.57) 0–5.00
 Frequency 1.69 (1.78) 0–5.00 2.28 (1.87) 0–5.00 1.28 (1.59) 0–5.00
 Amount 1.75 (1.79) 0–5.00 2.33 (1.87) 0–5.00 1.33 (1.60) 0–5.00

Note: All alcohol and cannabis use scores were greater for men compared to women (p-values < 0.0001).