pISSN 1226-6051
eISSN 2508-786X

Table. 1.

Table. 1.

Operational definition of explanatory variables

Variables Details
Socio-demographic
Age Age at the time of entering the cohort (i) under 50 (ii) over 50
Income quintile Classified into 1-10 quartiles based on income level
Number of hospitalizations Count the number of hospitalization routes
Duration of disease (years) Death (date of death-cohort entry date)
Survival (following end date-cohort entry date)
Indicator
BMI * Weight / Height2
CCI Calculation based on medical history 1 year prior to diagnosis
Operation
Mastectomy Procedure code N7131-N7135
Lymph node dissection Procedure code P2121-P2124
Therapy
Chemotherapy Procedure code KK151-KK159
Radiation therapy Procedure code HD051-HD089
Complication
Lymphedema Disease code I89.0, I97.2

* BMI: Body Mass Index, CCI: Charlson Comorbidity Index

Korean J Clin Pharm 2021;31:115-24 https://doi.org/10.24304/kjcp.2021.31.2.115
© 2021 Korean J Clin Pharm