preferred_name: Fluctuation of 2 or more points on a ten point numerical scale, less than twice per week
preferred_name_lc: fluctuation of 2 or more points on a ten point numerical scale, less than twice per week
label: Fluctuation of 2 or more points on a ten point numerical scale, less than twice per week
label_lc: fluctuation of 2 or more points on a ten point numerical scale, less than twice per week