Magnetic field strength as a function of global star formation and mass indicators. Each panel shows the median magnetic field strength, B, within the disc mask of the simulated sample (solid green circles) measured as described in Section 2.2. Error bars show IQR range. The solid green line shows the best fit, and the shaded region indicates the 95% prediction interval, with their fitted slopes and the standard error reported in the legends. Samples of observed galaxies taken from the literature and their best-fit relations (dashed lines), are overlaid with different color crosses: red (Lacki & Beck 2013), black (Lopez-Rodriguez 2023), purple (Chyży et al. 2011), navy blue (Beck et al. 2019), and goldenrod (Heald et al. 2022; Stein et al. 2020, 2019; Mora-Partiarroyo et al. 2019, CHANGES survey). Their respective best-fit relations are shown as dashed lines. Upper limits from Chyży et al. (2011) are shown as downward arrows, and are excluded from the fits. Top: B versus integrated SFR over the last 100 Myr. Central: B versus the SFR surface density. Bottom: B versus sSFR.