Table 6.

Summary of exploratory factor analysis before and after item deletion.

EFA round	Items included	KMO	Bartlett’s χ2	df	p	Number of factors	Cumulative variance explained	Decision
Initial EFA	48	0.926	8949.696	1,128	p < 0.001	3	46.680%	Item A9 removed
Revised EFA	47	0.928	8783.015	1,081	p < 0.001	3	47.094%	Retained

Principal axis factoring with Kaiser-normalized oblimin rotation was used. Item A9 was removed because its communality after extraction was 0.273 and its primary loading in the pattern matrix was below 0.50.