Table 3.

EFA^a and CFA^b of items in a measure of the willingness for pandemic-related screening and tracking.

Measures		EFA (N=2099)			CFA (N=2179)
		1-Factor solution	2-Factor solution	Factor 1 from 2-factor solutionc
Fit index
	χ2 (df), P value	596.24 (5), <.001	4.08 (1), .04	0 (0), <.001
	RMSEAd (CI.90)	0.237 (0.221-0.254)	0.038 (0.005-0.080)	0 (0-0)
	CFIe	0.953	1.000	1.000
	SRMRf	0.122	0.005	0

^aEFA: exploratory factor analysis.

^bCFA: confirmatory factor analysis.

^cFactor 1 was fully saturated, as it was a latent variable with 3 indicators. Because it was fully saturated, it had perfect model fit. Factor 2 only had 2 items. As such, factor 2 was underidentified and could not be fit to the data as a separate measurement model.

^dRMSEA: root mean square error of approximation.

^eCFI: comparative fit index.

^fSRMR: standardized root mean square residual.