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Table 4 Presentation of the results of the primary analyses in a 2 × 2 factorial trial[3]

From: Design, analysis and presentation of factorial randomised controlled trials

  Decision Analysis n = 100 no Decision Analysis n = 112 Video/leaflet n = 104 no Video/leaflet n = 108
Total Decisional Conflict, mean (SD) 27.6 (12.1) 38.9 (18.3) 30.3 (13.4) 36.8 (18.8)
Adjusted difference1,2 (95% CI) -9.4 (-13.0 to -5.8)3   -4.2 (-7.8 to -0.6)3  
p value < 0.001   0.021  
  1. 1 Adjusted for age, sex, decisional conflict at baseline, factorial design and general practice (all comparisons are for the intervention compared with its respective control) 2 Negative differences represent a favourable outcome for the relevant intervention 3 The interaction between the interventions was investigated as a secondary analysis and was found to be significant (interaction coefficient = 12 (95% CI 5 to 19), p = 0.001)