Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs41687-020-00220-x/MediaObjects/41687_2020_220_Fig4_HTML.png)
Cronbach’s alpha. Cronbach’s alpha is a measure of internal consistency reliability. Reliability was assessed for the FACT-EGFRI 14 14-item score for the 14 skin toxicities and the full FACT-EGFRI 18 scale of 18 items. Coefficients of > 0.70 are considered sufficient evidence of reliability