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Create a most-recent-value feature specification

Source: R/feature.R
omop.feature.latest_value.Rd

Produces a feature spec that extracts the value from the most recent (latest) record matching the concept set. Ordered by the table's date column, the last record's value_column is returned. Commonly used for lab measurements where the latest reading is clinically relevant (e.g. most recent HbA1c).

Usage

omop.feature.latest_value(
  concept_set,
  value_column = "value_as_number",
  name = NULL
)

Arguments

concept_set

Numeric vector of concept IDs, or an omop_concept_set object defining the concepts to match.

value_column

Character; name of the column from which to extract the value (default "value_as_number").

name

Character; optional custom name for the feature column. If NULL, auto-generated from the concept and table context.

Value

An omop_feature_spec object with type = "latest_value".

See also

ds.omop.plan.features, omop.feature.first_value, omop.feature.mean_value

Examples

if (FALSE) { # \dontrun{
spec <- omop.feature.latest_value(c(3004410),
  value_column = "value_as_number")
plan <- ds.omop.plan.features(plan, "labs",
  "measurement", specs = list(latest_glucose = spec))
} # }