Shared decision making is often challenging and never entirely rational.1 Even seemingly simple decisions, such as taking antibiotics for an upper respiratory tract infection or repairing a fractured bone, may encompass trade-offs, are influenced by cognitive biases, and can be clouded by emotion. Serious illness amplifies these biases and their effects. Decision making is even more complicated in the setting of advance care planning, when patients are trying to decide for their future selves rather than their current selves.
Tulsky JA. Decision Aids in Serious IllnessMoving What Works Into Practice. JAMA Intern Med. 2015;175(7):1221-1222. doi:10.1001/jamainternmed.2015.1702