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Table 3 Association of PFL participant characteristics with changes in amount of substance use reported for the 30 days prior to intervention

From: Reports of past alcohol and drug use following participation in a motivation enhancing intervention: Implications for clinical assessment and program evaluation

   Postintervention relative to preintervention   
   Less Same More   
Participant characteristic n % % % χ 2 (df) p
Peak number of drinks in a day
Age      48.79 (8) <.001
 <24 2,980 14.1 47.0 38.8   
 25-34 2,332 12.7 52.0 35.3   
 35-44 1,562 12.7 54.4 32.9   
 45-54 1,082 14.5 54.3 31.2   
 55+ 427 16.9 55.5 27.6   
Education      28.30 (8) <.001
 <High school (n = 89) 89 12.4 59.6 28.1   
 High School/GED 207 14.5 54.6 30.9   
 Some college 653 18.8 50.2 30.9   
 Tech school graduate 2,900 13.5 53.1 33.3   
 College degree(s) 2,696 13.1 49.9 37.1   
Race      12.34 (2) .002
 White 7,280 13.3 50.8 35.9   
 Non-white 1,007 16.0 53.2 30.8   
Marital Status      20.96 (4) <.001
 Never married 4,137 14.0 49.0 36.9   
 Married/live together 2,290 12.3 52.9 34.8   
 Divorced/separated/widowed 1,751 14.7 53.4 31.9   
Number of dependence indicators      140.91 (4) <.001
 0 2,410 14.8 59.3 26.0   
 1-2 3,171 14.4 48.3 37.3   
 3-6 2,793 11.9 47.3 40.8   
Usual number of drinks
Gender      7.55 (2) .023
 Male 6,227 12.2 57.3 30.5   
 Female 1,948 10.0 59.6 30.4   
Age      32.69 (8) <.001
 <24 2,980 11.5 55.1 33.5   
 25-34 2,332 11.7 57.7 30.6   
 35-44 1,562 10.7 59.7 29.6   
 45-54 1,082 12.9 61.2 25.9   
 55+ 427 13.6 61.4 25.1   
Race      7.04 (2) .030
 White 7,280 11.3 58.0 30.7   
 Non-white 1,007 14.1 56.4 29.5   
Marital Status      14.77 (4) .005
 Never married 4,137 11.8 56.1 32.1   
 Married/live together 2,290 10.8 60.2 29.0   
 Divorced/separated/widowed 1,751 12.7 58.7 28.6   
Number of dependence indicators      161.70 (4) <.001
 0 2,410 12.5 65.9 21.6   
 1-2 3,171 12.0 56.9 31.1   
 3-6 2,793 10.6 51.6 37.7   
Marijuana or other drug use
Age      81.63 (8) <.001
 <24 2,965 4.5 80.9 14.6   
 25-34 2,311 3.4 86.0 10.6   
 35-44 1,547 3.1 88.3 8.6   
 45-54 1,080 3.8 87.9 8.3   
 55+ 419 1.9 92.1 6.0   
Education      29.61 (8) <.001
 <High school 83 3.6 85.5 10.8   
 High School/GED 203 2.0 86.2 11.8   
 Some college 647 6.6 78.1 15.3   
 Tech school graduate 2,877 3.2 84.7 12.2   
 College degree(s) 2,687 4.4 84.3 11.3   
Marital Status      45.68 (4) <.001
 Never married 4,109 4.3 82.8 12.9   
 Married/live together 2,278 2.6 87.8 9.6   
 Divorced/separated/widowed 1,733 3.5 88.1 8.4   
Number of dependence indicators      70.61 (4) <.001
 0 2,397 3.7 88.2 8.1   
 1-2 3,148 3.6 86.4 10.0   
 3-6 2,768 3.8 81.1 15.1   
  1. We did not include nonsignificant associations for gender with peak number of drinks and marijuana/other drug use (χ2= 2.46, df = 2, p = .293 and χ2= 2.99, df = 2, p = .225; respectively), education on usual number of drinks (χ2= 7.71, df = 8, p = .463), or race on marijuana/other drug use (χ2= 4.81, df = 2, p = .09).