Table 2

Alcohol consumption, memory blackout frequency, and alcohol-related injury among high-risk college drinkers (n=954)

	Men (n=471)	Women (n=483)
Baseline alcohol use
Days drinking, past 28 days (SD)	12.0 (5.0)	11.5 (4.9)
Drinks per drinking day (SD)	7.4 (2.9)**	5.6 (2.4)**
Total drinks, past 28 days (SD)	81.8 (35.4)**	58.7 (28.0)**
Heavy drinking days^† (SD)	7.5 (3.5)**	6.9 (3.4)**
Baseline memory blackouts, past 12 months
0 memory blackouts, %	48.4	49.7
1–2 memory blackouts, %	29.5	28.2
3–5 memory blackouts, %	14.7	15.5
6+ memory blackouts, %	7.2	6.6
Alcohol-related injury^‡, past 6 months
Baseline, %	15.9	14.3
6-month follow-up, %	10.4	10.9
12-month follow-up, %	11.2	10.0
18-month follow-up, %	8.9	9.0
24-month follow-up, %	8.3	6.7
All follow-ups combined, %	24.6	26.5

*p<0.05; **p<0.01 (two-sample t-test).
↵† Days of drinking ≥5 drinks for men or ≥4 drinks for women.
↵‡ Positive response to both: ‘In the past 6 months, how many accidents or injuries have you had?’ and ‘Was alcohol a factor in any of your injuries?’