Factor Analysis with the 15-item Version of the Survey, n=501

Domaina	Subscale	Question #	Survey Question	Factor Loading	Retained for 9 item version
FACTOR 1
DM	Readiness	14	How ready are you to formally ask someone to be your medical decision maker?	0.78782	X
DM	Readiness	20	How ready are you to sign official papers naming a person or group of people to make medical decisions for you?	0.77456	X
QOL	Readiness	48	How ready are you to talk to your decision maker about the kind of medical care you would want if you were very sick or near the end of life?	0.69771	X
QOL	Readiness	54	How ready are you to sign official papers putting your wishes in writing about the kind of medical care you would want if you were very sick or near the end of life?	0.58319	X
DM	Self-efficacy	8	How confident are you that today you could ask someone to be your medical decision maker?	0.58285	X
FACTOR 2
FLEX	Self-efficacy	62	How confident are you that today you could talk with your doctor about how much flexibility you want to give your medical decision maker?	0.81753
QOL	Self-efficacy	43	How confident are you that today you could talk with your doctor about the care you would want if you were very sick or near the end of life?	0.7937	X
QOL	Self-efficacy	42	How confident are you that today you could talk with your medical decision maker about the care you would want if you were very sick or near the end of life?	0.65406	X
FLEX	Self-efficacy	61	How confident are you that today you could talk with your decision maker about how much flexibility you want to give them?	0.65401
QUEST	Self-efficacy	76	How confident are you that today you could ask the right questions of your doctor to help make good medical decisions?	0.63063
FACTOR 3
FLEX	Readiness	69	How ready are you to talk to your doctor about how much flexibility you want to give your decision maker?	0.81969
QOL	Readiness	50	How ready are you to talk to your doctor about the kind of medical care you would want if you were very sick or near the end of life?	0.75862	X
DM	Readiness	16	How ready are you to talk with your doctor about who you want your medical decision maker to be?	0.71665	X
FLEX	Readiness	67	How ready are you to talk to your decision maker about how much flexibility you want to give them?	0.57136
QUEST	Readiness	82	How ready are you to ask your doctor questions to help you make a good medical decision?	0.43226

^aDomains: DM =Medical Decision Maker, QOL = Quality of Life, FLEX = Flexibility for the Surrogate Decision Maker, QUEST = Asking Questions of Medical Providers