Description Usage Arguments Details Value Examples
View source: R/first_case_selection.R
Selects the first case stays of electronic medical records (EMRs) dataset and exclude patients with stays containing exclusion criteria within two years.
1 2 | first_case(data, diagnoses_case, diagnoses_exclusion, exclude_in_case_stay,
n_of_stays_max)
|
data |
A data.table of electronic medical records (EMRs). |
diagnoses_case |
A character vector containing codes to identify primary outcome diagnoses in stays. |
diagnoses_exclusion |
A character vector containing codes to identify exclusion diagnoses in stays. |
exclude_in_case_stay |
A Boolean. If TRUE, a case stay containing an exclusion criteria is discarded. If FALSE, case stays are not sought for exclusion criteria. |
n_of_stays_max |
A scalar giving the maximum number of stays allowed in the whole database for a unique patient. |
A case is defined as a patient who has experienced the primary outcome for the first time. Patients are excluded if they had a medical history defined by a list of one or more exclusion criteria. Stays containing one or more exclusion criteria are sought within a two year period before case. Any patient exceeding maximum number of stays is discarded.
A data.table
with selected first case stays.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | data(ep)
obj0 <- ep
obj1 <- first_case(
data = obj0,
diagnoses_case = 'PE',
diagnoses_exclusion = 'EXCLUSION',
exclude_in_case_stay = FALSE,
n_of_stays_max = 20
)
obj1
obj2 <- age_study_period_restrictions(
data = obj0,
cases = obj1,
starting_year = 2007,
final_year = 2013,
age_min = 0,
age_max = 120
)
obj2
obj3 <- case_crossover(
case_stay = obj2,
data = obj0,
exposure_diagnoses = '',
exposure_procedures = 'THR',
screening_index_stay = FALSE,
unique_exposure = TRUE,
interval_length = 42,
number_of_interval = 8,
wash_out = 365,
los_max = 42
)
obj3
obj3$graph
|
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