The mean MPR for psychiatric medications was 72%, compared with 79% for hypoglycemic medications. A modest linear correlation was observed between MPR rates for psychiatric and hypoglycemic medications (Pearson correlation coefficient, r=.26, p<.001). A scatterplot showed clustering effects at high and low MPR levels, but otherwise there was substantial discordance in rates of adherence between the medication classes. Among the 173 patients with good adherence to psychiatric medication (defined as an MPR ≥80%), 73% (N=126) had good adherence to hypoglycemic medication. Among the 200 patients with good adherence to hypoglycemic medication, 63% (N=126) had good adherence to psychiatric medication. Among the 119 patients with poor adherence to hypoglycemic medications (defined as an MPR <80%), 60% (N=72) had poor adherence to psychiatric medication. Among the 146 patients with poor adherence to psychiatric medication, 49% (N=72) had poor adherence to hypoglycemic medication (p<.001 for all).