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Table 1 Variables used in the analysis

From: Fast and optimal algorithm for case-control matching using registry data: application on the antibiotics use of colorectal cancer patients

Variables Type Meaning
Gender Exact Gender of patient (Males, Females)
Practice Exact Practice ID
JCG Exact Year of visiting the GP
Age Varying Age of the patient
Follow-up Exact Cases and controls should enter in database the same year
Follow-up Trimmed Controls could enter in database prior to the case
Comorbidity Index Exact Cases and controls should have the same number of diseases
Comorbidity Index Varying Controls could have less, equal or more diseases based on a threashold