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Table 4 Feasibility of the web-based patient decision aid: knowledge, preparation for decision making, and decisional conflict scores

From: Launching a virtual decision lab: development and field-testing of a web-based patient decision support research platform

Post-decision Aid Measures Videobooklet Decision Aid used in Clinical Care Web-based Decision Aid used for this Study t statistic
  (N = 243) (n = 126) (df = 367)
  mean (SD) mean (SD) p value
Osteoarthritis Decision Quality Index’s Knowledge Subscale 0 - 100% correct 67% (10%) 75% (11%) t = 4 p = <0.001
Preparation for Decision Making Scale 0 - 100 70 (26) 74 (30) t = 1 p = 0.18
Decisional Conflict Scale 0 - 100 15 (14) 19 (15) t = 2 p = 0.03
  1. Note: Videobooklet data gathered during routine clinical use over the two years prior to the study.
  2. SD = Standard Deviation.
  3. df = degrees of freedom.