NormativeReference: stratified normative values for a metric

Holds published reference (normative) values for a single metric, stratified by one or more grouping variables (e.g. age band, sex). Downstream code turns an observed value into a z-score or a percent-of-predicted against the matching stratum, which is the basis for most rehabilitation cut-offs (6MWT, gait speed, grip strength, spirometry, ...).

Usage

# S4 method for class 'NormativeReference'
show(object)

Arguments

object

A NormativeReference to display.

Value

The show method returns NULL invisibly and is called for the side effect of printing a compact summary.

Slots

metric

Character name of the metric (e.g. "gait_speed").

strata

data.frame with one row per stratum. Must contain numeric mean and sd columns; may contain n; any remaining columns are the stratification keys used for matching.

source

Character citation for the reference values.

version

Character version tag for the reference set.

unit

Character measurement unit.

See also

zScore, percentPredicted