The SF-12 was used to assess generic QOL.27 Physical and mental
summary scores from the SF-12 correlate highly with those obtained
from the SF-3627 and are scaled to a US population mean of 50 and
SD of 10 (higher scores are better). Multiple groups have suggested
minimal clinically important changes in SF-12 summary scores to be
2 to 2.5 points and moderate changes to be 5 points