Table 1.

Summary of the statistical indicators of the study, their corresponding definitions, and how they were calculated.

Statistical indicators	Definition	Calculation
Times	An absolute value index	The cumulative value of the number of requests for electronic medical record (EMR) data for research by professional and technical personnel in the observation unit (institution or department) during the observation period.
Frequency	An intensity index	The number of requests/∑the number of professional and technical personnel in this observation unit × time.
Proportion of requesters	A ratio indicator	∑the number of professional and technical personnel who have requested EMR data for research/∑the number of professional and technical personnel in this observation unit.
Number of departments that did not request data	A counting indicator	The number of departments that never requested EMR data for scientific research during the observation period.
Absolute increment of frequency	The absolute value of growth	Can be further divided into cumulative growth and annual growth.
Cumulative growth	The absolute value of growth	The difference between the frequency of a certain year and that at baseline (2016).
Annual growth	The absolute value of growth	The difference between the frequency of a year and that of the previous year.
Frequency growth rate	The growth rate of frequency	Divided into fixed base ratio growth rate and link ratio growth rate.
Relative ratio with fixed base	The growth rate of frequency	The net increase rate of frequency in a certain year compared with the baseline (2016), that is, the ratio of a certain year’s frequency to the baseline frequency minus 100%.
Link relative	The growth rate of frequency	The net increase rate of frequency in a year compared with the frequency of the previous year, that is, the ratio of frequency of a year to that of the previous year minus 100%.