Table 1.

Main features of blood donors with hepatitis B virus markers.

	Total	HBsAg-positive	OBI	Window period
n (%)	111 (0.022)	93 (0.019)	17 (0.003)	1 (0.0002)
Rate per 100,000 donors	22.6	18.9	3.5	0.2
Repeated donors, n (%)	12	1 (1.1)	10 (59)	1
Male gender, n (%)	67	55 (59)	11 (65)	1
Median age, years (range)	44 (23–63)	42 (22–62)	52 (29–65)	31
Native Spaniards, n (%)	34	21 (40)	13 (76)	0

HBsAg, hepatitis B surface antigen; OBI, occult B infection.