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. 2010 Sep 6;5:22. doi: 10.1186/1747-597X-5-22

Table 2.

Descriptive and nonparametric test statistics for key variables by referred and comparison mothers

Variables Referred Mothers
(N = 152)
Comparison Mothers
(N = 33)
Test Statistica
Age (s.d., years) 31.3 (7.38) 31.3 (6.64) U = 2438.5, z = .250

Education (%): χ2(2) = 29.32***

 <high school 47.4 9.1

 high school/GED 29.6 21.2

 some college/college degree 23.0 69.6

Self-reported current drinking problem (%) 31.6 12.1 χ2(1) = 5.08*

PD-6:

 mean scale score (s.d.) 3.57 (3.10) 1.48 (1.39) U = 1492.5, z = 3.68***

 % at cut point ≥7
(scale range: 0-12)
19.1 0

a Mann-Whitney U, Pearson's chi-square

*p < .05, **p < .01, ***p < .001