Is it possible to objectify the visual pain scale?

Objectives: To test our hypothesis that a new modified VAS (mVAS) is superior and more objective than VAS in evaluating pain perception and treatment response between genders who have renal colic pain.

Methods: The individuals in patient and control groups were first asked to mark the pain perceived during access of IV line (VASIV score). Then the patients with renal colic were asked to mark the pain they experienced before treatment (VASRC score) and at 15 and 30 minutes after the administration of the first analgesic drug.