Incidence and prevalence estimates in myasthenia gravis have varied widely. Recent
studies based on administrative health data have large sample sizes but lack rigorous
validation of MG cases, and have not examined the North American population. Our aim was
to explore trends in MG incidence and prevalence for the years 1996–2013 in the province
of Ontario, Canada (population 13.5 million). We employed a previously validated algorithm
to identify MG cases. Linking with census data allowed for the calculation of crude-and …