Preoperative High-Dose Steroid Has Long-Term Beneficial Effects for Myasthenia Gravis

Table 2

Cox regression analysis of prognostic factors in MG patients after thymectomy.

Factors	Hazard ratio	95% CI	P value
No preoperative high-dose steroid	1.946	(1.188–3.189)	0.008*
Sex (male)	0.936	(0.585–1.496)	0.781
Age at onset (≧40 years)	1.014	(0.630–1.631)	0.954
Thymoma (+)	1.901	(1.025–3.526)	0.041*
Osserman (2B, 3, 4)	0.880	(0.559–1.386)	0.582
Time of diagnosis from onset (≧1 year)	1.660	(1.026–2.686)	0.039*

∗Significant covariates, CI: confidence interval, and Hazard ratios refer to the categories interval.