preferred_name: Intensity of pain episodes rarely varied 2 points on a ten point numerical scale. Definition of rarely: intensity changed in less than 50% of the pain episodes.
preferred_name_lc: intensity of pain episodes rarely varied 2 points on a ten point numerical scale. definition of rarely: intensity changed in less than 50% of the pain episodes.
label: Intensity of pain episodes rarely varied 2 points on a ten point numerical scale. Definition of rarely: intensity changed in less than 50% of the pain episodes.
label_lc: intensity of pain episodes rarely varied 2 points on a ten point numerical scale. definition of rarely: intensity changed in less than 50% of the pain episodes.