Table 1.

Descriptives for SDM-Q-9 scale (N = 629)

Item	Mean	SD	α
1 The doctor made it clear that a decision needs to be made.	3.40	0.88
2 The doctor wanted to know exactly how I want to be involved in making the decision.	2.85	1.06
3 The doctor told me that there are different options for treating my medical condition.	2.83	1.09
4 The doctor precisely explained carefully the advantages and disadvantages of the treatment options.	2.79	1.11
5 The doctor helped me to understand all the given information.	3.23	0.94
6 The doctor asked me which treatment option I prefer.	2.47	1.20
7 The doctor and I thoroughly weighed the various different treatment options.	2.57	1.19
8 The doctor and I selected a treatment option together.	2.94	1.16
9 The doctor and I reached an agreement on how to proceed.	3.31	0.99
TOTAL	2.93	0.32	0.92