<p>Nonsubstantive and missing responses: Respondents" missing values have negative values in the database and are by default excluded from the analysis. This means that they are not included in statistical analysis (unless you change the default settings).</p>
<p>Response values "do not know", "refused", "invalid", and "none of above" are labeled as - 99, -98, -97 and -96 in the database.</p>
<span class="qtip-more"><a href="https://www.1ka.si/d/en/help/manuals/status-of-units-relevance-validity-and-missing-values" target="_blank">Read more</a></span>