Comparison between the derived [C/Fe] abundances from the individual analysed CH bands, colour-coded according to the effective temperature (left), surface gravity (middle), and metallicity (right) of the star. The dashed black line reproduces the 1:1 relation. The mean (μ), standard deviation (σ), median, and robust standard deviation (i.e. ~1.48 times the median absolute deviation, MAD) of the offsets are indicated in the first panel.