Relationship status (P = 0.046), any back pain (P = 0.012), non-specific low-back pain (P = 0.001), personality disorder (P = 0.009), EnHAS (P = 0.018), EnHDS (P = 0.048), EnPCS (P = 0.040), EnTSK (P = 0.002), nociplastic pain, enthesopathy, GAD, opiates, sleep efficiency, CRP, gender, hypermobility, EnPOAM-O, EnPOAM-A. The gene discussed is CRP; the disease is personality disorder.