A Systematic Review of Healthcare Big Data

Table 1

Big data and healthcare big data definition.

Sources	Definition
[7]	Healthcare big data can be defined as digitalized version of health information which is so vast and complex that they are not easy to manage using traditional software and/or hardware, nor can they be easily handled using conventional data management tools and methods
[8]	Big data means enormous amount of digital data that organizations and governments collect about individuals and their general surrounding environments where the generated data are about 2500 petabytes or even more
[9]	Big data in healthcare refers to the data sets with log (n × p) ≥ 7, and that they have high variety and high-speed characteristics
[10]	Big data can be defined as wealth of information described by massive volume, high velocity, and wide variety in order to have specific technology and analytical techniques to transform it into worth
[11]	Healthcare data generally incorporates electronic health records (EHRs) such as patient’s medical history, physician notes, clinical reports, biometric data, and other medical data related to health, as well as social media posts such as blog posts, tweets, Facebook postnotifications, and publications in medical journals