VALIDATION DATA

1. RELIABILITY
A. Internal Consistency	Tested
Cronbach's (Describe)	Cronbach alpha of 0. 87 for hip and knee osteoarthritis.
B. Reliability intraobserver or test-retest	Tested
Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe)	Short term (~4 week) retest reliability ICC=0.64 (95% CI 0.67, 0.86)
C. Reliability interobserver or Measurement error	Tested
Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe)	In random samples of patients from the same sites who had made decisions, the correlations of the SDMP_4 scores averaged .61.

2. VALIDITY
A. Content validity: face validity	Tested
Expert opinion (relevance and comprehensiveness) (Describe)	Content validity was confirmed through the extensive feedback from patients and providers in the development process as well as in the field tests. The survey is feasible and typically has very low missing data (1-3%).
B. Construct Validity: Structural validity	Tested
Hypotheses-testing	Tested
Cross-cultural validity	Not Tested
Brief Description	To assess construct validity, they hypothesized that patients who made an Informed Patient-Centered (IPC) Decision would have higher SDM scores. For Hips/Knees and Backs, patients who made an IPC Decision had significantly higher SDMP and SURE scores (p<0.001), but this relationship was not significant for either condition for CollaboRATE (Hips/Knees: p=0.24 and Backs: p=0.25).
C. Criterion validity	Tested
Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe)	For hips/knees, the SDMP score was significantly associated with viewing all of the patient decision aid compared with those who did not (P < 0.001). Both scores were significantly associated with less regret and higher satisfaction (P < 0.001) for hips/knees.