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Table 2 Comparisonsa of 1999 and 2001 rates of student drinking and related behaviors at eleven Massachusetts public colleges/universities.

From: Alcohol policy enforcement and changes in student drinking rates in a statewide public college system: a follow-up study

  1999
(N = 1252)
%
(95%CI)
2001b
(N = 1074)
%
(95%CI)
Chi-square,
p-value
Any drinking in past 12 months 87.9
(84.7-91.1)
86.3
(81.3-91.3)
0.46, .515
Any drinking in past 30 days 75.5
(71.6-79.4)
70.4
(64.8-76.0)
8.35, .016
Heavy episodic drinkingc in past 2 weeks 54.9
(49.3-60.5)
50.6
(45.2-56.0)
5.67, .039
Usual heavy episodic drinking (among past-30-days drinkers)d 67.1
(63.0-71.3)
56.8
(54.1-59.5)
16.27, .002
Heavy episodic drinking in past 2 weeks among those reporting no heavy drinking in high school (Uptake) 37.7
(32.7-42.7)
30.9
(24.0-37.8)
2.72, .130
Drove after drinking/rode with drunk driver in past 30 days 47.6
(43.8-51.4)
49.6
(44.5-54.7)
0.64, .442
Any marijuana use in past 30 days 22.6
(18.2-27.0)
22.2
(17.8-26.6)
0.04, .849
  1. a Chi-square tests were conducted, all with one degree of freedom, comparing 1999 and 2001 rates.
  2. b Rates reflect direct standardization to the 1999 sample profile with respect to gender, age, White/non-White race, and on/off-campus housing status.
  3. c Defined as >=5 drinks in one occasion for males, >=4 drinks for females.
  4. d Analysis subsample n = 837 for 1999, n = 760 for 2000 (unweighted). "Usual" heavy episodic drinking defined as usually engaging in heavy episodic drinking whenever they drink.