Table A1.

Summary of methods used in the testing of the reliability and validity of Physical Component Summary Score and Mental Component Summary Score in Short Form 12-Item Survey version−2 among an older (65 years or greater) US population.

Type	Subtype	Measures Used
Reliability	Internal consistency	Cronbach alpha
	Test-retest	Intra-class correlation
Validity
Construct Validity	Convergent and discriminant	Spearman rank correlation
	Structural	Confirmatory factor analysis
Criterion Validity	Concurrent	Analysis of variance, Tukey test
	Predictive	Logistic regression