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Table 2 Effects of DA: post-test measures of knowledge, attitudes, and intentions

From: Informed choice about breast cancer prevention: randomized controlled trial of an online decision aid intervention

 

Intervention

(n= 383)

Standard control

(n= 102)

Three-month control (n= 100) a

Between-groups differences

Post-test

    

Knowledge

Insufficient (≤50% correct)

146 (38.1%)

95 (93.1%)

 

Χ2(1 9 7.53, P <.001

 

Sufficient

237 (61.9%)

7 (6.9%)

 

Attitudes

Negative

284 (74.9%)

61 (61.6%)

 

Χ2(2) = 12.64, P = .002

 

Neutral

72 (19.0%)

35 (35.4%)

 
 

Positive

23 (6.1%)

3 (3.0%)

 

Intention for uptake

Not likely

323 (85.2%)

78 (77.2%)

 

Χ2(2) = 6.38, P = .041

 

Neutral

40 (10.6%)

20 (19.8%)

 
 

Likely

16 (4.2%)

3 (3.0%)

 

Three-month follow-up

    

Knowledge

Insufficient (≤ 50% correct)

288 (75.2%)

87 (85.3%)

88 (88.0%)

Χ2(2) = 10.71, P = .005

 

Sufficient

95 (24.8%)

15 (14.7%)

12 (12.0%)

Attitudes

Negative

280 (75.1%)

68 (69.4%)

59 (62.8%)

X2(4) = 7.84, P = .098

 

Neutral

83 (22.3%)

24 (24.5%)

30 (31.9%)

 

Positive

10 (2.7%)

6 (6.1%)

5 (5.3%)

Uptake at follow-up

No decision

171 (44.8%)

67 (65.7%)

70 (70.0%)

Χ2(4) = 29.06, P <.001

 

Take tamoxifen

0

0

0

 

Take raloxifenea

2 (0.5%)

0

0

 

Decided no drug

209 (54.7%)

35 (34.3%)

30 (30.0%)

  1. a Three-month control group did not complete measures at post-test.