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Table 2 The results of significance tests and effect sizes

From: Associations of the Korean patient placement criteria matching among individuals with alcohol-related problems with treatment completion and abstinence: an observational study

Variables

All

(n = 225)

No. of KPPC-matched treatments

\({\chi }^{2}\)

Cramer’s V

  

0 (n = 47)

1 (n = 54)

2 (n = 124)

  

Duration of alcohol abstinence in months†

  

9.73**

0.16

 0

98 (43.6%)

30 (36.8%)

24 (44.4%)

44 (35.5%)

  

 1

79 (35.1%)

12 (25.5%)

18 (33.3%)

49 (39.5%)

  

 2

48 (21.3%)

5 (10.6%)

12 (22.2%)

31 (25.0%)

  

No. of one-month treatment completion†

  

13.27***

0.21

 0

102 (45.3%)

32 (68.1%)

23 (42.6%)

47 (37.9%)

  

 1

18 (8.00%)

6 (12.8%)

3 (5.6%)

9 (7.3%)

  

 2

37 (16.4%)

4 (8.5%)

8 (14.8%)

25 (20.2%)

  

 3

68 (30.2%)

5 (10.6%)

20 (37.0%)

43 (34.7%)

  
  1. The post-hoc power analysis using G*Power software assessed the robustness of the significance of the KPPC-matched treatment effect on alcohol abstinence and treatment completion. The effect size used in G*Power was w = Cramer’s V × \(\sqrt{r-1}\), where r represents the number of categories in the smaller variable of the contingency table [3]. The resulting powers for alcohol abstinence and treatment completion were approximately 0.45 and 0.64, respectively
  2. †The Mantel–Haenszel Chi-square test was used because the row and column variables are on an ordinal scale
  3. *p < 0.05 **p < 0.01 ***p < 0.001
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Addiction Science & Clinical Practice

ISSN: 1940-0640