Table 1. Incidence rate (per 100,000 person-years) of hospitalized brain abscess in Taiwan, 2000–2013.

Parameter	No. of case	%	Incidence Rate (95% CI)	Relative risk (95% CI)
All patients	6027	100.00	1.88 (1.83–1.93)	-
Sex
Female	1762	29.24	1.11 (1.10–1.16)	Reference
Male	4265	70.76	2.63 (2.55–2.71)	2.37 (2.24–2.50)
Age, y
0–14	331	5.49	0.58 (0.52–0.65)	Reference
15–29	677	11.23	0.91 (0.85–0.98)	1.57 (1.38–1.79)
30–44	1115	18.80	1.41 (1.33–1.49)	2.42 (2.14–2.73)
45–59	1800	29.87	2.77 (2.64–2.90)	4.75 (4.23–5.34)
≥60	2104	34.91	4.67 (4.47–4.87)	8.01 (7.13–8.99)
Year
2000–2002	1158	19.21	1.72 (1.63–1.83)	Reference
2003–2005	1346	22.33	1.98 (1.87–2.09)	1.15 (1.06–1.24)
2006–2008	1349	22.38	1.96 (1.86–2.07)	1.14 (1.05–1.23)
2009–2011	1349	22.38	1.94 (1.84–2.05)	1.13 (1.04–1.22)
2012–2013	825	16.69	1.77 (1.65–1.89)	1.03(0.94–1.12)