Fig. 3

Standardized Values for Known Groups Validity. Standardized values for known groups validity. Known groups validity was assessed by examining differences in mean EGFRI subscores between patients who reported no symptoms (performance status = 0, n = 31) and any symptoms (performance status > 0, n = 93). ANOVA was used to compare FACT-EGFRI 18 scores between groups, with differences of 1/3 to 1/2 of a standard deviation considered of interest