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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.