Wouter Leclercq

Chapter 7 114 RESULTS A total of 38 sets of both SDM-Q-9 and SDM-Q-Doc questionnaires were obtained during the 6 months study period and were available for analysis. As 6 SDM-Q-9 questionnaires missed more than 2 items, patient acceptability was 84% (32/38). Similarly, surgeon acceptability was 97% (37/38). Therefore, study results are based on an analysis of 32 complete sets of consultations that were provided by 32 different patients and 13 individual general surgeons (range per surgeon 1-7). Mean patient age was 55±18 years whereas the female/male ratio was 17/15. Mean surgeon age was 47±11 year with a 1/12 female/male ratio. A wide range of pathologies was diagnosed during these consultations (Appendix 7.1). SDM-Q-9 and SDM-Q-Doc Mean total SDM-Q-9 score was 84.5±17.9 with a median score per item ranging from 4.0 to 5.0 (Table 7.3). Twelve of the 32 patients scored the maximum score. Mean total SDM-Q-Doc score was 76.8±13.4 with a median score per item ranging from 3.0 to 4.0. Three of the 32 consultations received a maximum score by the surgeon. SDM-Q-9 compared to SDM-Q-Doc Significant differences between surgeons and patients were found regarding item 4, 5 and 6 (Table 7.4). A Bland-Altman plot demonstrated higher mean SDM-Q-9 scores compared to SDM-Q-Doc scores, with an overall 7.8 difference (P=0.07, Figure 7.2). A -0.12 [95%CI -0.44-0.24] ICC between SDM-Q-9 and SDM-Q-Doc scores was calculated, indicating a negligible agreement. SIC scores The mean number of 10 possible SIC items that were scored was 4.1 ±1.3 (Table 7.2) . Basic information such as diagnosis and advised treatment were often documented. In contrast, patient competence, prognosis or consent were often not, or infrequently captured. Alternative treatment options (72%) and frequent or serious complications (81%) were often described, but only in 31% (10/32) all three of these items were documented. The ICC between SDM-Q-DOC and SIC was 0.01 [95%CI -0.34-0.35]. Also, no correlation was found between SDM-Q-9 and SIC score, -0.02 [95%CI -0.36-0.33].