Using two-step cluster analysis performed on the pure depression and anxiety scores and physiosomatic scores, CRP, z IR, z KYN/TRY, SpO2, PBT, and the diagnosis controls versus patients, as a categorial variable, we constructed three clusters (the silhouette measure of cohesion and separation was 0.61 indicating an adequate cluster solution). The gene discussed is CRP; the disease is major depressive disorder.