 VISIT    QSCAT AEDTHDTC DSSTDTC EARLIEST_DTHDTC
#&gt; 1       1 2016-01-15 Week 12 EQ-5D-5L     &lt;NA&gt; 2016-01         2016-01</div><div class='input'>
<span class='va'>AE1</span><span class='op'>$</span><span class='va'>AEDTHDTC</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>2</span><span class='op'>]</span> <span class='op'>&lt;-</span> <span class='st'>"2015-07-01"</span>
<span class='fu'>check_qs_qsdtc_after_dd</span><span class='op'>(</span>AE<spa