• Amanda C Blok, Daniel J Amante, Timothy P Hogan, Rajani S Sadasivam, Stephanie L Shimada, Susan Woods, Kim M Nazi, and Thomas K Houston.
• Veterans Affairs Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, United States Department of Veterans Affairs, 2215 Fuller Road, Mail Stop 152, Ann Arbor, MI, USA. Amanda.Blok@va.gov.
• J Gen Intern Med. 2021 Mar 1; 36 (3): 592-599.

BackgroundIn an effort to foster patient engagement, some healthcare systems provide their patients with open notes, enabling them to access their clinical notes online. In January 2013, the Veterans Health Administration (VA) implemented online access to clinical notes ("VA Notes") through the Blue Button feature of its patient portal.ObjectiveTo measure the association of online patient access to clinical notes with changes in healthcare utilization and clinician documentation behaviors.DesignA retrospective cohort study.PatientsPatients accessing My HealtheVet (MHV), the VA's online patient portal, between July 2011 and January 2015.Main MeasuresUse of healthcare services (primary care clinic visits and online electronic secure messaging), and characteristics of physician clinical documentation (readability of notes).Key ResultsAmong 882,575 unique portal users, those who accessed clinical notes (16.2%; N = 122,972) were younger, more racially homogenous (white), and less likely to be financially vulnerable. Compared with non-users, Notes users more frequently used the secure messaging feature on the portal (mean of 2.6 messages (SD 7.0) v. 0.87 messages (SD 3.3) in January-July 2013), but their higher use of secure messaging began prior to VA Notes implementation, and thus was not temporally related to the implementation. When comparing clinic visit rates pre- and post-implementation, Notes users had a small but significant increase in rate of 0.36 primary care clinic visits (2012 v. 2013) compared to portal users who did not view their Notes (p = 0.01). At baseline, the mean reading ease of primary care clinical notes was 53.8 (SD 10.1) and did not improve after implementation of VA Notes.ConclusionsVA Notes users were different than patients with portal access who did not view their notes online, and they had higher rates of healthcare service use prior to and after VA Notes implementation. Opportunities exist to improve clinical note access and readability.

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