I am using the VAS as an outcome measure of spasticity-related chronic pain. The VAS has a minimum clinically important difference (MCID) of 18-19 mm according Hägg and colleagues 2003 (DOI: 10.1007/s00586-002-0464-0 ) in patients with chronic low back pain.

Can i use in my case report the previously mentioned MCID of the VAS to compare my results?

If no, can someone please suggest what should I do in this case.

Thank you in advance