Table 6. Multivariate analyses for the postoperative treatment effect (Cox proportional hazards model).

Factor	SE	Wald	OR	95% CI	P
Age	0.388	5.580	2.502	1.169–5.357	0.018
Pathological diagnoses	0.272	4.442	1.775	1.041–3.026	0.035
MGFA clinical classification	0.282	6.234	2.024	1.164–3.521	0.013
Surgical approach	0.269	1.841	0.695	0.410–1.176	0.175

MGFA, Myasthenia Gravis Foundation of America.