Table 6.

Top-5 subject fields in terms of number of data rows.

Number	Subject field	Tables, n	Data variables, n	Rows (10,000×n)	Systems involved
1	Medical record	10	476	369824.53	Hospital information system, online diagnosis and treatment system
2	Medical technology	6	502	115073.35	Electrocardiogram system, radiology information system, echocardiography system, endoscopic system, dynamic electrocardiogram system, pathology information system, ultrasonic system, laboratory information system, interventional surgical workstation, medical technology reservation information system, outpatient information system, physical examination information system
3	Fee	8	440	60855.24	Hospital information system, physical examination information system, online diagnosis and treatment system
4	Medical advice	3	395	21366.64	Hospital information system, online diagnosis and treatment system
5	Staff	13	802	18138.94	Hospital information system, physical examination information system, electronic data capture, human resource system