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Figure 1.

Literature review flow chart.

Results

Overview

We grouped the studies into five major topics based on the

research questions, explicit and implicit aims of the studies, and

related measures addressed. The topics identified included

patient adoption, provider endorsement, health literacy, usability,

and utility (

Table 1

). Of the 120 articles that were reviewed, 66

(55.0%) were non-experimental descriptive, 26 (21.7%) were

qualitative or mixed-methods, 14 (11.7%) were randomized

controlled trials, 10 were pilot studies or case reports (8.3%),

and 4 were cohort studies (3.3%) (

Table 2

). Only 11 articles

explicitly identified a guiding theoretical framework, with the

Chronic Care Model being the most common among them. The

year 2011 was a turning point in the number of published

articles, which coincides with the initiation of CMS EHR

incentives program. The topical areas that showed the greatest

increase in volume were patient adoption and utility (

Table 1

).

See

Multimedia Appendix 1

for a brief description of each article

and the topical areas addressed. The following section describes

each topical area and discusses relevant implications for

research, development, and implementation of patient portals.

http://www.jmir.org/2015/6/e148/

J Med Internet Res 2015 | vol. 17 | iss. 6 | e148 |

Irizarry et al

JOURNAL OF MEDICAL INTERNET RESEARCH

104