The role of doctor's opinion in shared decision making: what does shared decision making really mean when considering invasive medical procedures?
OBJECTIVE
The goal of this study was to gain understanding about patients' perspectives on decision making in the context of invasive medical interventions and whether patients' decision-making preferences influenced the type of information they desired to be provided by physicians.


METHODS
Questionnaire study of consecutive patients in a university-based general medicine clinic.


METHODS
Patients were presented with a randomized list of three types of information that physicians could provide (risk, benefit and physician's opinion on whether they should undergo the procedure). Patients were asked whether they preferred patient-based, physician-based, or shared decision making and then were asked to select which one or combination of these three information types was most important to them in their own decision making. Patients were also asked to self-report on how many invasive procedures they had undergone in their own lives.


METHODS
A total of 202 consecutive patients (mean age = 65.1 years, SD = 12.3, range 28-88; mean education 13.3 years, SD 2.9, range 2-23).


METHODS
Patient reports.


RESULTS
Of the 202 patients, two patients reported no decision-making preference. These two patients were excluded from the analysis. Of the 200 remaining patients, 62.5% (125/200) preferred shared, 22.5%(45/200) preferred physician-based, and 15.5% (31/200) preferred patient-based decision making. More than half of all subjects chose physician opinion as the most important type of information for decision making. Older patients (odds ratio 1.028; confidence interval 1.003-1.053) were more likely to have ranked the doctor's opinion as the most important in their decision making for invasive medical interventions.


CONCLUSIONS
Although most patients want to share decision making with their physicians regarding invasive procedures, the majority of these patients report relying on the doctor's opinion on whether to undergo the procedure as the most important information in their own decision making.
Mazur
Dennis J
DJ
Oregon Health and Science University, Portland, Oregon, USA. dennis.mazur@med.va.gov
Hickam
David H
DH
Mazur
Marcus D
MD
Mazur
Matthew D
MD
D000046:Academic Medical Centers; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003657:Decision Making; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009922:Oregon; D010358:Patient Participation; D010819:Physician's Role; D013514:Surgical Procedures, Operative; D011795:Surveys and Questionnaires