Table 2

Twin relative risks and RMD for other diseases

DiseasePrevalenceλMλDRMD
Type 1 diabetes0.4%95204.9
Schizophrenia1.0%48105.2
Multiple sclerosis0.1%270348.2
Crohn’s disease0.1%4254010.9
Autism0.1%7503025.8
  • a SIR, standardized incidence ratios.

  • a Ratio is the ratio of FRRs for early onset versus all index cases. In Utah, early onset is defined as before age 50 or age 60, depending on site.