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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Am J Addict. 2013 Apr 5;22(5):481–485. doi: 10.1111/j.1521-0391.2013.12019.x

Table 3.

Simple Rank Tests for Brief Intervention and alcohol outcomes.

Assessment Only (n=21) Brief Intervention (n=16)
Decrease in number of drinks on a drinking day
 n 21 16
 Median (Q1–Q3) 0.2 (0.0–0.5) 0.7 (0.2–1.8)
 Mean (SD) 0.4 (1.0) 1.0 (1.0)
P-value 0.040
Decrease in % of drinking days in past 6 months
 n 21 16
 Median (Q1–Q3) 0.1 (0.0–0.2) 0.1 (0.0–0.3)
 Mean (SD) 0.1 (0.2) 0.2 (0.3)
P-value 0.177
Decrease in number of weeks drinking above SDL in past 6 months
 n 21 16
 Median (Q1–Q3) 0.0 (0.0–2.0) 0.5 (0.0–7.0)
 Mean (SD) 1.7 (3.5) 5.6 (9.0)
P-value 0.127
Decrease in # of binges in past 6 months
 n 21 16
 Median (Q1–Q3) 0.0 (0.0–2.0) 0.5 (0.0–4.0)
 Mean (SD) 1.2 (4.5) 14.5 (44.4)
P-value 0.198

One-sided P-values are from Wilcoxon exact tests.