Table 3. Nurse assessments of electronic health record (EHR) system usability and quality of care in hospitals by work environment type.

		N (%) of nurses agreeing with statement who work in hospitals with a work environment that is:
Outcomes	All ( n  = 12,377)	Poor ( n  = 2,256)	Mixed ( n  = 6,214)	Better ( n  = 3,907)	p -Value a
Not satisfied with the patient record system	2,597 (25.1%)	730 (38.6%)	1,282 (24.7%)	585 (17.9%)	<0.001
The systems do not make it easy to access a patient's clinical data quickly	2,034 (19.7%)	557 (29.7%)	1,001 (19.3%)	476 (14.6%)	<0.001
The systems interfere with the provision of patient care	5,668 (55.4%)	1,146 (61.9%)	2,874 (55.8%)	1648 (51.2%)	<0.001
The systems are not easy to use	3,290 (31.9%)	816 (43.5%)	1,657 (31.9%)	817 (25.1%)	<0.001
I do not trust the accuracy of the patient assessment data documented in the systems	1,802 (17.5%)	522 (27.8%)	883 (17.0%)	397 (12.2%)	<0.001
I do not trust the accuracy of the medication information in the systems	1,145 (11.1%)	313 (16.7%)	579 (11.2%)	253 (7.8%)	<0.001
The systems do not help me to do my work in an efficient way	3,321 (32.2%)	854 (45.6%)	1,649 (31.8%)	818 (25.2%)	<0.001
The systems do not make it easy to share information in a timely way with other members of the health care team	2,107 (20.5%)	559 (29.8%)	1,055 (20.4%)	493 (15.2%)	<0.001
Nurses were not involved in choosing (or modifying) the patient record system	3,183 (48.5%)	819 (67.6%)	1,641 (50.5%)	723 (34.4%)	<0.001
Quality of care on unit is fair or poor	1,244 (11.9%)	433 (23.0%)	631 (12.0%)	180 (5.5%)	<0.001
Poor overall unit grade on patient safety (C,D, or F)	2,980 (28.4%)	889 (46.8%)	1,538 (29.1%)	553 (16.7%)	<0.001

Note: Percentages in the “All” column may not align with overall sample size due to missing data. Sample sizes range from 6,565 to 10,495.

^a p -values generated from chi-squares.