Table 2. Comparison of Prevalence and Average Incidence between Younger-Age and Older-Age MG Cases.

	Young age (<50)	Old age (≥50)	Relative risk (95% CI)	p value
Prevalence (per 100000)	9.26	19.24	2.077 (1.976–2.183)	<0.001
Incidence (per 100000)	0.47	1.18	2.490 (2.006–3.091)	<0.001

CI, confidence interval; MG, myasthenia gravis.