Table 3

Items and contents of the SDM-Q-9, response distribution, means, SD and corrected item–total correlations (n=516)

Items and content of the SDM-Q-9Completely disagree
N (%)
Strongly disagree
N (%)
Somewhat disagree
N (%)
Somewhat agree
N (%)
Strongly agree
N (%)
Completely agree (%)
N (%)
Mean
(SD)
Corrected item–total correlation
1. My doctor made clear that a decision needs to be made13 (2.5)15 (2.9)40 (7.8)141 (27.3)135 (26.2)172 (33.3)3.72
(1.226)
0.602*
2. My doctor wanted to know exactly how I want to be involved in making the decision25 (4.8)41 (7.9)62 (12.0)148 (28.7)136 (26.4)104 (20.2)3.24
(1.374)
0.703*
3. My doctor told me that there are different options for treating my medical condition30 (5.8)54 (10.5)55 (10.7)130 (25.2)141 (27.3)106 (20.5)3.19
(1.453)
0.744*
4. My doctor precisely explained the advantages and disadvantages of the treatment options39 (7.6)42 (8.1)49 (9.5)132 (25.6)132 (25.6)122 (23.6)3.25
(1.497)
0.715*
5. My doctor helped me understand all the information18 (3.5)31 (6.0)44 (8.5)136 (26.4)128 (24.8)159 (30.8)3.55
(1.348)
0.831*
6. My doctor asked me which treatment option I prefer30 (5.8)57 (11.0)84 (16.3)112 (21.7)121 (23.4)112 (21.7)3.11
(1.491)
0.787*
7. My doctor and I thoroughly weighed the different treatment options29 (5.6)53 (10.3)78 (15.1)140 (27.1)131 (25.4)85 (16.5)3.06
(1.408)
0.799
8. My doctor and I selected a treatment option together17 (3.3)45 (8.7)52 (10.1)114 (22.1)131 (25.4)157 (30.4)3.49
(1.409)
0.775*
9. My doctor and I reached an agreement on how to proceed12 (2.3)33 (6.4)35 (6.8)113 (21.9)145 (28.1)178 (34.5)3.71
(1.304)
0.699*
  • *P<0.0005.