Fig. 8
From: Uncovering the potential of smartphones for behavior monitoring during migraine follow-up
Top: difference in illuminance between paired headache vs non-headache observed values per participant regardless of the type of day. (small jitter has been added in the vertical axis to better visualize clusters of (overlapping) values); Bottom: observed mean values of ambient light during headache and non-headache periods per participant. Corresponding pairs are connected with dashed line. Vertical lines indicate the median of the values for each period