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. 2019 Apr 1;26(2):124–136. doi: 10.3747/co.26.4621

TABLE XII.

Phase 3 screening preferences from 453 participants

Test group Undergoing screening

Yes No Unsure
Intervention (n=230)
 Pre-test proportion 0.8 0.07 0.14
 Post-test proportion 0.64 0.2 0.17
 Within-group difference
  Symmetrya 35.56, p<0.001
  Marginal homogeneityb 35.18, p<0.001

Control (n=223)
 Pre-test proportion 0.79 0.08 0.13
 Post-test proportion 0.62 0.2 0.18
 Within-group difference
  Symmetrya 34.57, p<0.001
  Marginal homogeneityb 34.38, p<0.001

Between-group difference [post-test scores (n=453)]
 Χ2 (df=2) 0.23
p Value 0.89
 Odds ratio 0.94
 95% Confidence interval 0.74 to 1.20
a

Chi-square (df=3).

b

Chi-square (df=2).