Table 4

Mean differences for the continuous outcomes: knowledge, decisional conflict and decisional confidence

OutcomeStudyGroupNMean (SD)Difference, p value
KnowledgeMathieu et al 24*Intervention1137.35 (1.84)1.1, p<0.001
Control1896.27 (1.85)
Gummersbach et al 20*Intervention1615.49 (1.99)0.26, p=0.26
Control1685.23 (2.06)
Hersch et al 11Intervention41913.49 (4.36)1.65, p<0.001
Control41911.84 (3.74)
Decisional conflictEden et al 25Before7546.33 (27.04)−38.0, p<0.001
After758.33 (15.58)
Hersch et al 11 Intervention41912.55 (17.60)0.35, p=0.78
Control41912.20 (18.90)
Decisional confidenceEden et al 25§Before7579.67 (18.62)16.16, p<0.001
After7595.73 (6.86)
Gummersbach et al 20Intervention1785.15 (1.36)−0.37, p=0.017
Control1825.52 (0.93)
Hersch et al 11**Intervention4194.35 (0.74)−0.18, p=0.0003
Control4194.53 (0.67)
  • *Knowledge scored, range 0–10.

  • †Knowledge scored, range 0–22.

  • ‡Decision conflict scale, range 0–100.

  • §Self-efficacy scale, range 0–100.

  • ¶Confidence scale, range 0–6.

  • **Confidence scale, range 0–5 (mean of 3 subscales).