Table 2

Practices’ HIT Index Score, and Adoption and Use of Individual HIT Functionalities, Time 1 (2007–2010) and Time 2 (2012–2013)

Variable	T1	T2	Difference, T2 – T1	P Value^a
HIT index score,^b mean (95% CI)	4.7	7.3	2.6 (2.3–2.9)	<.001
HIT functionality
EHR includes patient medications, %	29	51	22	<.001
Physicians use EHR for progress notes, %	26	51	23	<.001
Physicians use EHR for problem list, %	28	47	21	<.001
Physicians use EHR for potential drug interactions, %	17	46	28	<.001
Physicians use EHR for prompts and reminders, %	19	34	15	<.001
Physicians use EHR for alerts on abnormal test results, %	15	30	15	<.001
Practice uses EHR to collect data for quality measures, %	17	42	26	<.001
Physicians transmit prescriptions directly to pharmacies via computer, %	25	70	45	<.001
Physicians have electronic access to laboratory results, %	86	82	−4	<.001
Physicians have electronic access to clinical information on patients’ ED visits, %	70	66	−4	<.001
Physicians have electronic access to hospital discharge summaries, %	69	73	4	<.001
Physicians have electronic access to pharmacy record of prescriptions filled by patients, %	21	43	22	<.001
Physicians communicate with patients via e-mail, %	11	21	10	<.001
Patients can view medical record online, %	1	19	18	<.001
Practice maintains electronic registry, %
For patients with asthma	7	17	10	<.001
For patients with congestive heart failure	6	9	3	<.001
For patients with depression	6	8	1	<.001
For patients with diabetes	12	22	10	<.001

ED = emergency department; EHR = electronic health record; HIT = health information technology; T1 = time 1; T2 = time 2.
↵a Paired t tests were used to test for significant difference in the overall HIT index over time. The McNemar test was used to test for significant differences in the proportion adopting each functionality over time.
↵b Possible range is 0 to 18.
Note: Data were weighted to be nationally representative.