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Table 2 Descriptive and nonparametric test statistics for key variables by referred and comparison mothers

From: Psychological distress among Plains Indian mothers with children referred to screening for Fetal Alcohol Spectrum Disorders

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  
  1. a Mann-Whitney U, Pearson's chi-square
  2. *p < .05, **p < .01, ***p < .001