The recent Global Burden of Disease study report age-standardised UC prevalence rates in sub-Saharan Africa ranging from 9.9 to 11.2 per 100 000 population. According to Watermeyer et al, these figures stand in stark contrast to traditionally high-incidence regions (eg North America), where the prevalence was 442 per 100 000 population in 2017.2
UC has a bimodal pattern of incidence. The main onset peaks between 15- and 30-years. A second, and the smaller peak of incidence occurs between the 50-...
