Table 2. Characteristics of reported cases of influenza-associated encephalopathy in Japan, 2004–2010.

	Reported cases	Male (%)	p value	Median age (range)	p value	Fatal cases (%)	p value
A	170	94 (55.3)	0.232†	4 (0–79)	<0.001‡ *	22 (12.9)	<0.001† *
B	50	21 (42.0)	0.012† *	4.5 (0–83)	0.006‡ *	7 (14.0)	0.002† *
A (H1N1) 2009	322	196 (60.9)	Reference	7 (0–72)	Reference	12 (3.7)	Reference
Unknown	28	16 (57.1)	…	5.5 (1–52)	…	4 (14.3)	…
Total	570	327 (57.4)	…	6 (0–83)	…	45 (7.9)	…

^*Statistically significant (Bonferroni adjusted significance level of p = 0.025).

^†Chi-square test.

^‡Mann–Whitney test.