Notes. We note the more than one order of magnitude difference in the calculated SFR between the IGIMF models and the invariant IMF models. The Lee et al. (2009) value is derived assuming their purely empirical correction to the Kenniutt relation (reached without an underlying model for an IMF variation), which is consistent with the IGIMF models in the regime −4 < log₁₀(L_Hα/(10⁴¹ erg s⁻¹)) < 0. To form a single massive star with a main-sequence mass of 25 M_⊙ over 10⁵ yr (Wuchterl & Tscharnuter 2003; Duarte-Cabral et al. 2013), a SFR = 25/10⁵ M_⊙ yr⁻¹ = 10^−3.60 M_⊙ yr⁻¹ is needed over this time, but a dwarf galaxy would be forming other stars as well, such that the SFRs calculated using the IGIMF theory are consistent with the existence of such a star in Leo P.