match_case: Selected controls matching a list of variables from a case

In rEHR: Manipulating and Analysing Electronic Health Record Data

Description

Helper function for get_matches() This function wil perform incidence density sampling or exact sampling up to a supplied number of matched controls

Usage

match_case(matcher, control_pool, n_controls, id, replace)

Arguments

matcher	list of character strings defining the matching conditions
control_pool	dataframe of potential controls for matching
n_controls	The number of controls for each case. If replace == FALSE this is a maximum value
id	named vector of length 1 for the variable name and value of the case identifier
replace	logical should sampling of matched controls be with replacement (incident density sampling) or not.

Value

A dataframe of matched controls or NULL if no controls could be found

rEHR documentation built on Jan. 23, 2017, 1 p.m.