Table 2. Unadjusted relationships between IT use and physician decisions and characteristics.

	Overall	Feedback			Disease Prevalence			Electronic Reminders
	mean	Yes	No	p-value	Yes	No	p-value	Yes	No	p-value
N		202	51		130	125		119	135
Process of Care
Certainty of CHD Diagnosis (0-1)	0.57	0.59	0.51	0.025	0.56	0.59	0.211	0.57	0.57	0.957
Number of Tests Ordered	6.15	6.54	6.51	0.938	6.61	6.44	0.581	6.67	6.37	0.325
Number of Medications Prescribed	2.24	2.30	2.06	0.241	2.20	2.30	0.562	2.31	2.19	0.455
Number of Questions Asked	11.19	11.27	10.92	0.715	11.23	11.22	0.993	10.59	11.89	0.087
Number of pieces of advice Given	4.13	4.25	3.65	0.246	4.13	4.16	0.944	4.33	3.90	0.300
Physician characteristics
Experience (years)	18.2	18.6	16.7	0.271	15.5	21.0	<0.001	17.4	19.1	0.183
Female (%)	50.0	51.5	45.1	0.415	51.5	48.0	0.572	45.2	55.9	0.088
US/Canadian medical school (%)	85.4	85.5	84.0	0.789	89.0	81.6	0.098	84.8	85.6	0.869
Top 25 medical school (%)	21.3	19.0	32.0	0.046	26.8	16.0	0.037	17.4	26.3	0.090
South Carolina (%)	34.0	33.2	35.3	0.774	33.1	34.4	0.823	40.7	25.4	0.010
Urban area (%)	68.0	70.8	58.8	0.100	74.6	61.6	0.026	64.4	72.9	0.150
Practice size (number of MDs)				0.075			0.025			0.598
Solo (%)	21.0	18.6	26.0		15.0	26.6		18.3	22.0
2-3 (%)	22.6	20.6	32.0		19.7	25.8		21.4	24.6
4-10 (%)	31.0	32.2	28.0		37.8	24.2		31.3	31.4
11 or more (%)	25.4	28.6	14.0		27.6	23.4		29.0	22.0

NOTES: Sample sizes vary slightly across IT types because physicians did not answer all questions.

P-values are from t-tests for continuous variables and chi-square or Fisher's exact tests (as appropriate) for dichotomous/categorical variables.