Wouter Leclercq

Shared decision making and surgical informed consent in general surgery: A pilot study on differences in perspectives of physicians and patients 113 7 Descriptive statistics included means and standard deviation (SD), or median with range as appropriate. A Wilcoxon signed ranks test analysed significant differences between scores on the related individual items of the SDM-Q-9 and SDM-Q-Doc using the SPSS for Windows version 22 (SPSS Inc., Chicago, IL, US). A Bland-Altman plot was generated to graphically investigate the agreement between total SDM-Q-9 and SDM-Q-Doc scores. The mean differences between total SDM-Q-9 and SDM-Q-Doc scores were calculated and tested for significance by a paired samples t-test. Furthermore, intraclass correlation coefficients (ICC) quantified the degree of accordance between patient and surgeon in SDM and SIC, using the two-way random model for consistency. 4 Acceptability was assessed as the percentage of participants who completed a minimum of 7 of the 9 questions of each questionnaire. 1 According to the SDM-Q-9 and SDM-Q-Doc guideline, a mean score of the completed questions was used to score the 1 or 2 missing question(s). A questionnaire was not analysed if more than 2 items were missing. 1