Table. 2.

Table. 2.

Methods for establishing operational definitions in cancer research

The English abbreviation is the name of a searchable variable of the health insurance data
Person with a ‘C’ code in the primary diagnosis (SICK_SYM1)
Person with a ‘C’ code in the primary diagnosis (SICK_SYM1) or the secondary diagnosis (SICK_SYM2)
Person with a ‘C’ code in the entire diagnosis (SICK_SYM1–5)
Person with a ‘C’ code in the primary diagnosis (SICK_SYM1) among inpatients (FORM_CD)
Person with a ‘C’ code in the primary diagnosis (SICK_SYM1) or the secondary diagnosis (SICK_SYM2) among inpatients (FORM_CD)
Person with a ‘C’ code in the entire diagnosis (SICK_SYM1–5) among inpatients (FORM_CD)
Other procedure or treatment codes, and medical expenses of one million won or more
Clin Pediatr Hematol Oncol 2022;29:1-11
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