Table 8.

Logistic regression analysis of IVIG treatment efficacy

Indicator	Standardized β	SE	Wald χ2	OR	95% CI	P
Concomitant lung infection	2.172	1.76	6.93	8.776	3.768-18.776	0.001
IVIG treatment > two weeks from onset	1.844	1.53	4.71	6.321	2.338-21.330	0.002
Respiratory muscle involvement	1.268	1.44	2.35	3.553	1.12-2.97	0.041

Note: IVIG, intravenous gammaglobulin.