Table 2.

Three multivariate models to predict use of electronic prescribing: A) Parameters of physicians’ perceptions and intentions; B) Parameters of practice characteristics; C) Parameters of physician characteristics.

A) PHYSICIANS’ PERCEPTIONS AND INTENTIONS*	PERCEIVED USEFULNESS + PERCEIVED EASE OF USE + SOCIAL INFLUENCE + BEHAVIOURAL INTENTION
	ESTIMATE	95% CI	P VALUE
Intercept	0.22	−0.26 to 0.70	.36
Perceived usefulness
• Average score of usefulness	−0.02	−0.14 to 0.09	.72
Perceived ease of use
• MOXXI will be easy to use	0.06	−0.03 to 0.16	.19
Social influence
• Colleagues’ attitudes will be positive toward my use of MOXXI	0.01	−0.09 to 0.10	.85
Behavioural intention
• I will use MOXXI with most of my patients	−0.03	−0.11 to 0.05	.50
B) PRACTICE CHARACTERISTICS†	PRACTICE VOLUME + CONTINUITY OF CARE + MEDICATION USE + PRACTICE SIZE
	ESTIMATE	95% CI	P VALUE
Intercept	0.20	−0.17 to 0.57	.28
Practice volume‡	0.00	−0.01 to 0.01	.34
Continuity of care§	−0.12	−0.72 to 0.48	.68
Average medication use||	0.08	0.01 to 0.14	.02
Practice size¶	0.00	0.00 to 0.00	.52
C) PHYSICIAN CHARACTERISTICS#	AGE + SEX + INFORMATION-ACQUISITION STYLE + COMPUTER EXPERIENCE
	ESTIMATE	95% CI	P VALUE
Intercept	0.07	−0.55 to 0.68	.83
Practice experience
• Graduation year	−0.001	−0.01 to 0.01	.77
Sex**
• Male	0.03	−0.07 to 0.14	.53
Physician typology††
• Pragmatist	0.26	0.08 to 0.45	.01
• Seeker	0.16	−0.05 to 0.36	.13
• Receptive	0.26	0.06 to 0.47	.01
Computer experience
• Hours per week of computer use	0.01	0.005 to 0.02	.001

MOXXI—medical office of the 21st century.

^*R² = 0.05; adjusted R² = 0.02.

^†R² = 0.12; adjusted R² = 0.06.

^‡Daily no. of patients seen based on the no. of patient visits during the 18 months before the study.

^§Proportion of visits made to study physician for each patient in the practice in the 18 months before the study.

^||No. of medications was counted for each patient in the 18 months before the study.

^¶Unique patients that visited the study physician during the 18 months before study enrolment.

^#R² = 0.34; adjusted R² = 0.27.

^**Female sex was reference category.

^††Traditionalist was reference category.