preferred_name: Fluctuation of 2 or more points on a ten point numerical rating scale, two or more times per week
preferred_name_lc: fluctuation of 2 or more points on a ten point numerical rating scale, two or more times per week
label: Fluctuation of 2 or more points on a ten point numerical rating scale, two or more times per week
label_lc: fluctuation of 2 or more points on a ten point numerical rating scale, two or more times per week