Introduction

Database      eb.connect(..., connector=...) → db.diagnosis, db.medication, …
EventFrame    everyday event queries          → matching / occurring / first_per_patient
Cohort        study definition                → entry / include / exclude / attrition
Table/Column  custom predicates               → when verbs are not enough

import encodebox as eb

db = eb.connect(..., connector="my_sentinel_connector")

index = (
    db.diagnosis
    .matching("E11", code_type="10", match="starts_with")
    .occurring(at_least=2, gap_days=30)
    .with_index_date()
    .first_per_patient()
)

other = (
    db.diagnosis
    .matching("E10", code_type="10", match="starts_with")
    .occurring(at_least=2, gap_days=30)
    .first_per_patient()
)

cohort = (
    eb.Cohort("t2dm", database=db)
    .entry(index, index="first")
    .include(db.demographic.age_at_index(18, 89))
    .include(other, window=(-365, 0))
)