2.4. Subjective Symptom Assessments
COLD
The information concerning the subjective symptoms of study participants was collected using a visual analog questionnaire (VAS), where the leftmost and rightmost sides represented no symptoms and the severest symptoms, respectively, on the VAS horizontal line of 100 mm in length. Participants were required to respond to queries related to subjective sensations. Three major questions related to cold sensation symptoms, such as ratings on the cold sensation of the fingertips, hand, and whole body, were chosen to diagnose the classified subjective cold sensation among the study participants. Other questions were related to diagnosing cold sensations in the toes and feet.