Compute the number of days of prior observation in the current observation period at a certain date

Usage

addPriorObservation(
  x,
  indexDate = "cohort_start_date",
  priorObservationName = "prior_observation",
  priorObservationType = "days",
  name = NULL
)

Arguments

x: Table with individuals in the cdm.
indexDate: Variable in x that contains the date to compute the demographics characteristics.
priorObservationName: Prior observation variable name.
priorObservationType: Whether to return a "date" or the number of "days".
name: Name of the new table, if NULL a temporary table is returned.

Value

cohort table with added column containing prior observation of the individuals.

Examples

# \donttest{
library(PatientProfiles)

cdm <- mockPatientProfiles(source = "duckdb")

cdm$cohort1 |>
  addPriorObservation()
#> # Source:   table<og_139_1775495324> [?? x 5]
#> # Database: DuckDB 1.5.1 [unknown@Linux 6.17.0-1008-azure:R 4.5.3/:memory:]
#>    cohort_definition_id subject_id cohort_start_date cohort_end_date
#>                   <int>      <int> <date>            <date>         
#>  1                    3          1 1981-10-27        1990-02-28     
#>  2                    2          6 2001-02-25        2007-04-08     
#>  3                    1          8 1988-12-01        1989-04-10     
#>  4                    1          5 1971-08-14        1975-03-22     
#>  5                    2          2 1957-09-13        1985-10-01     
#>  6                    1          7 1973-05-25        1985-09-07     
#>  7                    2         10 1939-08-11        1948-11-23     
#>  8                    3          9 1936-05-24        1940-04-27     
#>  9                    3          4 1980-05-15        1993-02-09     
#> 10                    2          3 1935-04-02        1938-01-13     
#> # ℹ 1 more variable: prior_observation <int>

# }