tau_func

Internal function to calculate the additional, between group, standard error (tau2) to add to S2.

internal

An implementation of methods presented by Spiegelhalter (2005) <doi:10.1002/sim.1970> Funnel plots for comparing institutional performance, for standardised ratios, ratios of counts and proportions with additive overdispersion adjustment.

Chris Mainey

FunnelPlotR

Funnel Plots for Comparing Institutional Performance

Andrew Johnson

Matthew Bass

NHS-R Community 

tau_func function

<dl><dt>n</dt>
<dd>The number of groups for data items, e.g. hospitals trusts that z-scores are calculated at.</dd>
<dt>phi</dt>
<dd>The dispersion ratio, where &gt; 1 means overdispersion</dd>
<dt>S</dt>
<dd>Standard error (within cluster, calculated in z-score process)</dd></dl>

Arguments

Calculate the between group standard error (tau2) using a dispersion factor — tau_func

<dl>

<dt>n</dt>
<dd>The number of groups for data items, e.g. hospitals trusts that z-scores are calculated at.</dd>


<dt>phi</dt>
<dd>The dispersion ratio, where &gt; 1 means overdispersion</dd>


<dt>S</dt>
<dd>Standard error (within cluster, calculated in z-score process)</dd>

</dl>

tau_func: Calculate the between group standard error (tau2) using a dispersion factor

Description

Usage

Value

Arguments