Table 1. Basic characteristics of 49 case-patients with severe fever with thrombocytopenia syndrome in Japan.

	Total (n = 49)	Nonfatal (n = 34)	Fatal (n = 15)	p-value
Sex
Male	17 (35%)	12 (71%)	5 (29%)
Female	32 (65%)	22(69%)	10(31%)
Age, y [IQR]	78 [65–84]	69 [62–78]	83 [79–87]	0.0033*
40–49	2 (4%)	2 (6%)	0 (0%)
50–59	6 (12%)	5 (15%)	1 (7%)
60–69	11 (22%)	11 (32%)	0 (0%)
70–79	10 (20%)	6 (18%)	4 (27%)
80–89	17 (35%)	9 (26%)	8 (53%)
90–99	3 (6%)	1 (3%)	2 (13%)
Underlying medical condition
Hypertension	23 (47%)	16 (47%)	7 (47%)	1.00†
Diabetes	12 (24%)	8 (24%)	4 (27%)	1.00†
Cancer	2 (4%)	1 (3%)	1 (7%)	0.52†
Time from onset to initial visit, d [IQR]	3 [2–5]	3 [3–5]	4 [1–6]	0.61*
Time from onset to admission, d [IQR]	4 [2–5]	4 [4–5]	4 [1–6]	0.69*
Time from onset to death, d [IQR]	–	–	8 [5–11]
Entering an ICU	14 (29%)	7 (21%)	7 (47%)	0.09†

Unless indicated otherwise, the data are expressed as number (percentage).

Note: Abbreviations. y, year; IQR, interquartile range; d, day; ICU, intensive care unit.

*Wilcoxon rank-sum test

†Fisher’s exact test