Table 2.

The results of the analyses of covariance for stress related to information systems.

Studied variablesa	Model A		Model B
	F test (df)	P value	F test (df)	P value
Number of systems in daily use	145.70 (1)	<.001	52.32 (1)	<.001
Experience of using EHRsb	12.22 (1)	<.001	13.73 (1)	<.001
Participation in ISc development	15.76 (1)	<.001	3.54 (1)	.06
Perceived benefits	—d	—	95.13 (1)	<.001
Technical problems	—	—	719.50 (1)	<.001
Feedback	—	—	25.88 (1)	<.001
User-friendliness	—	—	376.86 (1)	<.001
R2	0.082 (1)	—	0.349 (1)	—

^aAll analyses were adjusted for gender, age, employment sector, specialization status, and electronic health record in use.

^bEHRs: electronic health records.

^cIS: information systems.

^dNot applicable.