Dimensions	Factors	Measured Items	Factor loading	Eigen-values	% of Var. (Cum.%)	Cronbach's α value
Organizational characteristics	User involvement	USER1	.911	3.306	22.038% (22.038%)	.9284
		USER2	.891
		USER3	.867
		USER4	.820
	Adequate resources	RES1	.821	3.278	21.852% (43.889%)	.8603
		RES2	.817
		RES3	.817
		RES4	.793
		RES5	.707
	Hospital size	SIZE1	.961	2.720	18.131% (62.020%)	.9383
		SIZE2	.939
		SIZE3	.910
	Internal need	NEED1	.857	2.359	15.730% (77.750%)	.8319
		NEED2	.831
		NEED3	.804
Environmental characteristics	Vendor support	VEND1	.946	4.079	45.318% (45.318%)	.9379
		VEND2	.924
		VEND3	.895
		VEND4	.889
		VEND5	.813
Environmental characteristics	Government policy	GOV 1	.833	2.617	29.083% (74.401%)	.8078
		GOV 2	.819
		GOV 3	.767
		GOV 4	.760
E-signature characteristics	Security protection	SECUR1	.875	4.029	44.766% (44.766%)	.9042
		SECUR2	.859
		SECUR3	.845
		SECUR4	.776
		SECUR5	.761
		SECUR6	.735
	System complexity	SYS1	.825	2.027	22.527% (67.292%)	.7199
		SYS2	.808
		SYS3	.717