TSRC, Tob. Sci. Res. Conf., 2018, 72, abstr. 078
Challenges in the administration of visual analog scales (VAS) during clinical pharmacology trials of ENDS products
High Point Clinical Trials Center, High Point, NC, USA
Visual Analog Scales (VAS) are an important and commonly used tool for subject feedback in clinical trials. VAS scales subjectively measure characteristics across a range of values which cannot be easily measured by objective techniques or mechanical...