The amount of time staying awake after bedtime does not affect my sleepwalking

As part of my investigation of what factor impacts my sleepwalking, I looked at the effect of staying awake after bedtime. Is it beneficial to linger in bed before falling asleep, as a way to relax? Or could it have a negative impact by reducing the actual amount of time spending sleeping?

Staying awake after going to bed versus falling asleep almost immediately has no impact on my sleepwalking, as the scores below show.

Average values, +/- SEM. % variation and statistical significance are indicated (if less than 1%)

Data exclude nights with clonazepam and are normalized for the effect of coffee and tiredness.