High relative importance of P_hy in predicting Σ_SFR, compared to other physical variables and determined from a RF regression analysis, is shown for the whole disk (top) and for the inner and outer disk separately (central and bottom panel, respectively). We have considered also P_DE^* for the whole disk analysis, which is the best Σ_SFR predictor when P_hy is not included, as shown by the small inset of the top panel. For the inner disk, the inset in the middle panel shown that for regions with Q < 1 the Toomre condensation parameter, Σ_gas/t_T, strongly related to P_hy, also has a high relative importance. In the outer disk (bottom panel), P_hy has the highest relative importance; however, when we replace P_hy with the Toomre condensation parameter, the small inset shows that this has a lower relevance than P_hy for driving star formation.