4.2.5. Big data/accuracy of data
Given the sheer quantity of data available, one of the biggest challenges
is identifywhich data to collect, howto capture it, and howto analyze
it [102]. Once researchers figure this out, the other challenge is
data quality and consistency, given the current absence of standard
methodologies, such as unique identifiers for patients, physicians, and
diseases for use across all data types [128] and varying expectations
and time to collect fully complete data within EHRs.