highly significantp < 0.0001
Intragroup comparisons The paired t -test conducted to compare between red and green RF within each group demonstrated a highly significant difference between green and red RF mean values within all groups ( p < 0.0001).
Intragroup comparisons The paired t -test conducted to compare between red and green RF within each group demonstrated a highly significant difference between green and red RF mean values within all groups ( p < 0.0001).