Table 3: The fitted relations between total $B_{\rm {tot}}$, random $B_{\rm {ran}}$, and regular $B_{\rm {reg}}$ magnetic field strength, and the field regularity ${B_{{\rm reg}}}/{B_{{\rm ran}}}$, versus star-formation rate SFR for all regions of NGC 4254 and for different magnetic arms.
Regions a b r N
  $\log B_{\rm {tot}}=a \log {\rm SFR} + b$    
all $0.18\pm0.01$ $1.56\pm0.01$ +0.93 277
S arm $0.13\pm0.01$ $1.50\pm0.02$ +0.89 25
W arm $0.17\pm0.01$ $1.59\pm0.02$ +0.98 16
N arm $0.19\pm0.03$ $1.56\pm0.05$ +0.72 31
  $\log B_{\rm {ran}}=a \log {\rm SFR} + b$    
all $0.26\pm0.01$ $1.64\pm0.02$ 0.91 234
S arm $0.22\pm0.02$ $1.57\pm0.03$ 0.91 25
W arm $0.30\pm0.03$ $1.73\pm0.06$ 0.95 16
N arm $0.20 \pm 0.03$ $1.55\pm0.05$ 0.72 31
  $\log B_{\rm {reg}}=a \log {\rm SFR} + b$    
all two-way trend 0.08 234
S arm $-0.28\pm0.04$ $0.52\pm0.07$ -0.49 25
W arm $0.17\pm0.07$ $1.43\pm0.15$ 0.46 16
N arm $0.47\pm0.16$ $1.69\pm0.05$ 0.28 31
  $\log \frac{B_{\rm {reg}}}{B_{\rm {ran}}}=a \log {\rm SFR} + b$    
all $-0.32\pm0.01$ $-0.90\pm0.03$ -0.71 234
S arm $-0.42\pm0.05$ $-0.90\pm0.08$ -0.78 25
W arm $-0.30\pm0.04$ $-0.71\pm0.11$ -0.75 16
N arm $-0.56\pm0.21$ $-1.41\pm0.39$ -0.21 31


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