Table 2.

Association between use of shared inpatient-outpatient EHR and follow-up care and events after discharge

	Adjusted Rates		Shared Inpatient-Outpatient EHR vs Outpatient EHR Only
	Outpatient EHR Only	Shared Inpatient-Outpatient EHR	Adjusted OR	95% CI
Follow-up within 7 days after hospital discharge
Any follow-up a	72.83%	69.21%	0.84	0.80	0.87
In-person office visita	55.91%	50.48%	0.80	0.77	0.84
Phone visit	9.04%	8.85%	0.98	0.90	1.06
Secure message	11.50%	11.74%	1.03	0.94	1.12
Lab testa	32.00%	30.70%	0.94	0.89	0.99
Events 30 days after hospital discharge
ED visits	16.39%	16.69%	1.02	0.96	1.09
Hospital Readmission	9.49%	9.35%	0.98	0.91	1.06

Logistic regression analyses adjusted for patient age, gender, neighborhood SES, race/ethnicity, office copayment, calendar month, time (year, continuous variable), time², medical center, interaction of medical center and time +time², comorbidity score (centered), interaction of comorbidity score and time, with standard errors corrected by clustering at patient level. Adjusted rates are calculated by applying the coefficients from the logistic regression to the cohort as if everyone were in pre-inpatient-EHR period and in post-inpatient-EHR period respectively.

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