In all patients, after controlling for gender, hypertension, and coronary heart disease, PHN occurrence showed significant correlations with the lower serum NINJ2 levels, presence of diabetes and older age on the 7-th day (r = −0.404, p < 0.001; r = 0.277, p = 0.022; r = 0.279, p = 0.018), but does not appear to be correlated with NRS-7d, ΔCS-7d, ΔWS-7d, ΔCP-7d and ΔHP-7d (p = 0.110–0.686) (Table 2). Here, NINJ2 is linked to diabetes mellitus.