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Table 2 Effect of the intervention on knowledge and decisional conflicta

From: Effectiveness of a decision aid for promoting colorectal cancer screening in Spain: a randomized trial

 

Center A

Center B

DA effect

Center effect

Interaction

DA

(n = 43)

Control (n = 40)

DA

(n = 10)

Control (n = 14)

Knowledge

75 (14.4)

59.4 (14.4)

87.5 (11.3)

60.1 (17.4)

39.6 (< 0.001)

3.83 (0.055)

2.96 (0.088)

DCS

22.2 (14.6)

48.9 (21.3)

29.7 (11.8)

29.2 (12.2)

10.8 (0.001)

2.31 (0.131)

11.5 (0.001)

Informed

23.1 (17.5)

85.0 (20.6)

33.3 (20.8)

33.9 (17.1)

49.3 (< 0.001)

21.0 (< 0.001)

47.5 (< 0.001)

Values

19.0 (14.7)

45.2 (39.0)

31.7 (11.0)

30.4 (14.8)

4.02 (0.048)

0.03 (0.861)

4.90 (0.029)

Support

21.3 (17.4)

29.2 (18.5)

25.8 (9.17)

29.8 (13.4)

2.24 (0.138)

0.42 (0.518)

0.25 (0.620)

Uncertainty

25.4 (18.9)

50.2 (34.7)

32.5 (19.8)

27.4 (22.3)

2.53 (0.115)

1.61 (0.208)

5.84 (0.017)

Effectiveness

22.2 (17.1)

38.3 (29.8)

26.3 (7.68)

25.9 (14.9)

2.29 (0.133)

0.65 (0.421)

2.51 (0.116)

  1. aMeans (sd) by group and center, and results of ANOVAs (F, p-value). For knowledge (range 0–100), higher scores indicate a better result, and the opposite applies for the decisional conflict scale (DCS) and its subscales (range 0–100). DA decision aid