TABLE 1.

Exploratory factor analysis based on an eigenvalue greater than 1.

	1	2	3
ADO1	0.777
ADO2	0.738
ADO3	0.736
ADO4	0.707
ADO5	0.710
NSO1		0.736
NSO2		0.756
NSO3		0.772
NSO4		0.713
ADT1	0.637
ADT2	0.590
ADT3	0.769
ADT4	0.677
NST1		0.651
NST2		0.649
NST3		0.619
NST4		0.665
NST5		0.672
PPF1			0.782
PPF2			0.722
PPF3			0.660
PPF4			0.516
% of variance	28.94	18.27	13.25