Table 2. Predictive factors and cutoff values for nonresponsiveness to medium-dose IVIG.

Factor	Odds ratio (95% CI)	P value
Illness days*
≤5 vs. >6	5.47 (1.55-19.24)	0.008
Percentage of neutrophils (%)
≥65 vs. <65	0.87 (0.22-3.42)	0.842
C-reactive protein (mg/L)
≥100 vs. <100	0.54 (0.16-1.84)	0.331
Aspartate aminotransferase (IU/L)
≥100 vs. <100	0.26 (0.04-1.43)	0.124
Alanine aminotransferase (IU/L)
≥200 vs. <200	0.88 (0.16-4.85)	0.887
Sodium (mmol/L)
≤136 vs. >136	3.63 (1.15-11.41)	0.027

CI, confidence interval; IVIG, intravenous immunoglobulin.

^*Illness days: illness days as of initial IVIG administration