The other reason was, if it has no effect, to be able to use those data as part of the "no drugs" group for other comparisons.
It turns out that acetaminophen has no effect on my sleepwalking scores, as the graph below show. The number of day collected in the acetaminophen group is still too low to form definitive conclusions but the trends so far do not indicate an effect. Especially the variability in the time between events (graph E) and time of first events (graph F) will need more data points before being conclusive.
|Average values, +/- SEM. % variation and statistical significance are indicated (if less than 1%)|