cipant ID’s that are specific to the data collection system are replaced by the proper global study ID, variables of interest are selected, data ranges are checked (and corrected if needed), and data types are set (in accordance to the study code-book). Finally, the cleaned data set is saved to the ‘data/cleaned’ folder, ready for further processing in the final analyses.</p>
<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="co"># -------------------------------