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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Addict Behav. 2018 Jan 12;80:89–94. doi: 10.1016/j.addbeh.2018.01.013

Table 3.

Bivariate analyses of demographic and alcohol use characteristics by any reported blackouts during Years 4–6

Participant Characteristics (N = 1,854) Blackouts
Yes
(n = 965)		 Blackouts
No
(n = 889)		 p value
Demographics
 Female 619 (64.1%) 533 (60.0%) .063
 Age at Year 4 21.8 (0.3) 21.8 (0.4) .578
 Caucasian 613 (63.5%) 472 (53.1%) < .001
Alcohol Use
 Year 4 motivation to change 2.0 (1.3) 1.7 (1.1) < .001
 Year 5 motivation to change 2.0 (1.4) 1.6 (1.0) < .001
 Year 6 motivation to change 2.0 (1.3) 1.6 (1.0) < .001
 Year 4 frequency feeling drunk 5.6 (7.8) 1.1 (3.4) < .001
 Year 5 frequency feeling drunk 4.7 (6.7) 0.7 (1.9) < .001
 Year 6 frequency feeling drunk 4.7 (7.8) 0.8 (2.5) < .001
 Year 4 quantity of alcohol consumption 3.7 (2.4) 1.6 (1.9) < .001
 Year 5 quantity of alcohol consumption 3.4 (2.4) 1.5 (1.5) < .001
 Year 6 quantity of alcohol consumption 3.1 (3.1) 1.5 (1.6) < .001

Notes: n (%) or mean (SD). Frequency of motivation to change, feeling drunk, and quantity (i.e., drinks per drinking day) were calculated for the previous three months at each assessment.