As shown in Table 3, univariate analysis of 64 patients (30 patients in stable AP group, 34 patients in the AMI group) revealed that PA (C16:0), SA (C18:0) and C20:2n-6 levels were positively associated with FGF21 (r = 0.478, p < 0.001; r = 0.267, p = 0.033, r = 0.294, p = 0.018, respectively) while γ-linolenic acid (C18:3n-6), C22:4n-6, C22:6n-3 were negatively associated with FGF21 (r = −0.369, p = 0.003; r = −0.3604, p = 0.003, and r = −0.269, p = 0.032, respectively). Here, FGF21 is linked to alkaline phosphatase measurement.