eb/packages/GGIR/vignettes/GGIR.html#42_Output_part_4</a></p>
<p>Among these we assume that most are intuitive:</p>
<ul>
<li><p>sleep onset and wakeup</p></li>
<li><p>Sleep duration during SPT, which is the accumulate sleep time
(sustained inactivity bouts classified as sleep)</p></li>
<li><p>WASO, the time spent in wakefulness after sleep onset. However,
there are possible a few concepts that need clarifications:</p></li>
</ul>
<div class="section level3">
<h3 id="sleep-regularity-index-sri">Sleep Regulari