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Table 6 Women’s conceptual and numeric screening knowledge before and after receiving the decision aid by education group

From: Improving women’s knowledge about prenatal screening in the era of non-invasive prenatal testing for Down syndrome – development and acceptability of a low literacy decision aid

  Higher education (n = 17) Lower education (n = 12) Total women (n = 29)
Pre Knowledge Scores, Mean (SD)a
 Conceptual (maximum score 16) 12.1 (1.7) 11.9 (2.2) 12 (1.9)
 Numeric (maximum score 6) 0.9 (1.4) 0.3 (0.7) 0.7 (1.2)
 NIPT knowledge (maximum score 5) 2.1 (1.2) 2.2 (0.6) 2.1 (1.0)
 Total knowledge score (max score n) 13.1 (2.3) 12. 2 (1.8) 12.7 (2.1)
 Adequate knowledgeb (total score ≥ 17 out of 22), n (%) 1(6) 0 (0) 1(4)
Post Knowledge Scores, Mean (SD)
 Conceptual (maximum score 16) 14.7 (1.4) 14.1 (1.5) 14.4 (1.4)
 Numeric (maximum score 6) 4.2 (2.4) 3.4 (2.4) 3.9 (2.4)
 NIPT knowledge (maximum score 5) 4.3 (1.0) 3.8 (1.1) 4.1 (1.09)
 Total knowledge score (max score 22) 18.9 (3.2) 17.5 (3.4) 18.3 (3.3)
 Adequate knowledge (total score ≥ 17 out of 22), n (%) 13 (77) 7 (58) 20 (69)
  1. aData missing for 1 participant
  2. bParticipants were classified as having ‘adequate’ or ‘inadequate’ knowledge using the midpoint of the scale. It was decided a priori that a pass mark of 75% or above (score ≥17 out of 22) would be considered ‘adequate knowledge’