source: main/adopters/nm/trunk/src/main/webapps/nmibis-content/xml/query/module/prams/data_issue/RedFlag.xml @ 19851

<?xml version="1.0" encoding="ISO-8859-1"?>

<DATA_ISSUE xmlns:ibis="http://www.ibisph.org">
        <NAME>RedFlag</NAME>
        <TITLE>Statistical Stability</TITLE>
        <TEXT>The Statistical Stability indicator alerts the user when rates are unstable. it is based on
                a statistic called the "Relative Standard Error," or RSE, which is the standard error expressed
                as a proportion of the point estimate.
        </TEXT>
        <TEXT>A dash (-) means that the relative standard error (RSE) is below 0.30, and the count or rate
                may be considered stable.
        </TEXT>
        <TEXT>"Unstable" is displayed when the RSE is 0.30-0.50, and the count or rate should be considered 
                unstable and may fluctuate widely across time periods due to random variation (chance).
        </TEXT>
        <TEXT>"Very Unstable" is displayed when the RSE is  greater than 0.50, and the count or rate should 
                not be used to infer population risk. You should combine years or otherwise increase the 
                population size used in the query.
        </TEXT>
        <TEXT>Problems with statistical instability typically occur when there is a small number of health 
                events in a small population. Statistical stability is on a continuum. For your convenience, 
                IBIS provides warnings at two cut-off values for the relative standard error (RSE 0.30 and 0.50). 
                For more information on statistical stability, visit the NM-IBIS Reliability and Validity page
                (https://ibis.health.state.nm.us/resource/ReliabilityValidity.html).
        </TEXT>
</DATA_ISSUE>