Logarithm of the ratio of the estimated SFR based on the IR emission over the true SFR as given by the CIGALE models, as a function of their true specific SFR (sSFR). The comparisons show the extinction-dependent and extinction-independent calibrations of Eq. (4), and the L_IR–SFR calibrations of Jarrett et al. (2013), Chang et al. (2015), and Cluver et al. (2017) with blue, red, purple, yellow, and green lines respectively for model galaxies separated in groups of low (left), moderate (center), and high (right) extinction.