Figure 1.

Monozygotic twin discordance rates for common disease. Estimates of mean monozygotic twin discordance rates from the literature and the TwinsUK cohort for a series of common diseases, such as colon cancer and breast cancer [32], rheumatoid arthritis (RA) [33,34], osteoarthritis (OA) [35], psoriasis [36], cardiovascular disease (CVD) and myocardial infarction (MI) [37], type 1 diabetes [38,39], type 2 diabetes [38,40], autism and autism spectrum disorders (ASD) [41-44], and schizophrenia [45].