For all included co-T2DM schizophrenia patients, age (r = 0.01, p = 0.017), schizophrenia duration (r = 0.17, p = 0.001), prescription olanzapine (r = 0.11, p = 0.035), prescription risperidone (r = −0.03, p = 0.035), and LDL-C levels (r = 0.27, p < 0.001) were positively associated with PRL levels, while, prescription metformin (r = −0.11, p = 0.048), prescription aripiprazole (r = −0.01, p = 0.009), FBG levels (r = −0.09, p = 0.041), and UA levels (r = −0.14, p = 0.007) were positively associated with PRL levels (Table 2). Here, PRL is linked to schizophrenia.