VALIDATION DATA

1. RELIABILITY
A. Internal Consistency	Tested
Cronbach's (Describe)	A high Cronbach’s alpha was found for the full scale (0.725)
B. Reliability intraobserver or test-retest	Not Tested
Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe)
C. Reliability interobserver or Measurement error	Not Tested
Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe)

2. VALIDITY
A. Content validity: face validity	Tested
Expert opinion (relevance and comprehensiveness) (Describe)	LOKS-19 questions were able to tackle all aspects of osteoporosis (facts and treatment of osteoporosis, exercise and physical activity, lifestyle habits and osteoporosis, prevention of osteoporosis, causes of osteoporosis, gender, race and osteoporosis, and factors protecting against osteoporosis). These features make our scale more thorough than the previous validated scales.
B. Construct Validity: Structural validity	Tested
Hypotheses-testing	Not Tested
Cross-cultural validity	Tested
Brief Description	LOKS-19 scale items converged over a solution of seven factors that had an Eigenvalue over 1, explaining a total of 55.89% of the variance. A Kaiser-Meyer-Olkin measure of sampling adequacy of 0.691 was found, with a significant Bartlett’s test of sphericity (p < 0.001). A confirmatory factor analysis was run on sample 2, using the structure obtained in sample 1. Results have shown that the maximum likelihood chi-square = 25.59 and degrees of freedom = 9, which gave an χ2 /df = 2.84. For non-centrality fit indices, the Steiger-Lind RMSEA was 0.08 [0.040–0.101]. Finally, the Joreskog GFI equaled 0.966 and AGFI equaled 0.977
C. Criterion validity	Not Tested
Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe)