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eISSN 2508-786X

Table. 1.

Table. 1.

Operational definition of explanatory variables

Variables Details
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)
BMI * Weight / Height2
CCI Calculation based on medical history 1 year prior to diagnosis
Mastectomy Procedure code N7131-N7135
Lymph node dissection Procedure code P2121-P2124
Chemotherapy Procedure code KK151-KK159
Radiation therapy Procedure code HD051-HD089
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