A Hybrid Implementation-effectiveness Stepped Wedge Cluster Randomised Controlled Trial to Determine the Effectiveness of the Goals of Care Initiative

Decision Conflict Scale

时间窗: Immediately following intervention

Patient satisfaction with decision and overall decision conflict will be measured using the Ottawa Decisional Conflict Scale. The scale consists of 16 items with patients scoring themselves on a five point scale (0, Strongly Agree - 4, Strongly Disagree). The scale includes five subscales: uncertainty, support, values, informed, effective decision. The total score and subscale scores are calculated by dividing the sum of the items by the number of items within that subscale and multiplying by twenty five (scored range from 0 to 100; 0 score indicates no decisional conflict, 100 indicates extremely high decisional conflict). This scale evaluates the quality of decision as outlined within internationally recognised guidelines to establish the effectiveness of decision aids. Furthermore, some of the subscales address evaluating the quality of the decision process (feeling informed about the options, clarity of values).

SDM-Q-9

时间窗: Immediately following intervention

Patient involvement in decision making will be measured using the SDM-Q-9 questionnaire. The questionnaire contains nine items with respondents scoring on a six point scale (0 represents completely disagree to 5 which represents completely disagree) how much they agree with the presented statement. The highest score attainable, 45, represents the highest level of perceived Shared Decision Making and 0 represents no perceived involvement in Shared Decision Making.