Filtering of date interval data within study interval. Can be used for filtering e.g. for hospital visits, which are date intervals (time periods). The function finds rows for which ival_var overlaps with interval created based on index_date, time_before and time_after.

Source: R/filter.R

Filtering of date interval data within study interval. Can be used for filtering e.g. for hospital visits, which are date intervals (time periods). The function finds rows for which ival_var overlaps with interval created based on index_date, time_before and time_after.

filter_ival_olap_ival(
  .data,
  ival_var,
  index_date,
  time_before = years(2),
  time_after = days(0)
)

Arguments

ival_var

the interval to be filtered
index_date

date or other lubridate variable as reference point around which to search
time_before

the time before the index date what defines the start of filtering interval (lubridate format, e.g years(1), weeks(10), days(20) etc.)
time_after

the time after the index date (default is 0 days) what defines the start of filtering interval (lubridate format, e.g years(1), weeks(10), days(20) etc.)

Value

returns a tibble object with filtered rows

See also

filter_date_in_ival for date filtering by fixed interval

Other filter functions: filter_date_in_ival()

Examples

if (FALSE) {
d <- dplyr::left_join(sample_cohort,sample_regdata)
filtered_d <- d %>%
  filter_ival_olap_ival(ival_var = lubridate::interval(adm_date,disc_date),
                        index_date = postingdate,
                        time_before = years(2),
                        time_after = days(0))
head(filtered_d)
}