Table 2.

relation between myasthenic crisis frequency and thymectomy

	Thymectomized patients (n = 110)	Non-thymectomized patients (n = 109)	P value
Patients with myasthenic crisis (n = 62)	20	42*	0.001
Episodes of myasthenic crisis (n = 89)	25	64†	0.016

* This group had more probability of having crisis with an odds ratio of 2.8 (with 95% confidence interval of 1.5 to 5.2)

^†Myasthenic crises were more prevalent in this group with a relative risk of 2.6 (with 95% confidence interval of 1.8 to 3.8)