Table I.

Blood donors and donations tested for hepatitis C virus and human immunodeficiency virus in Italy, 2009–2015.

Total n. of donors tested	12,258,587
Age (range)	18–70 years
Age and gender distribution	Age groups	Male (%)	Female (%)
	18–25	11.3	18.9
	26–35	18.9	20.2
	36–45	30.0	26.5
	46–55	26.8	23.5
	56–65	12.3	10.5
	>65	0.7	0.4
Male to female ratio	2.3
N. of FT donors tested	1,934,612 (15.8%)
Age and gender distribution	Age groups	Male (%)	Female (%)
	18–25	23.6	28.5
	26–35	24.2	23.2
	36–45	27.0	25.0
	46–55	18.8	18.0
	56–65	6.3	5.2
	>65	0.1	0.1
Male to female ratio	1.7
N. of RP donors tested	10,323,975 (84.2%)
Age and gender distribution	Age groups	Male (%)	Female (%)
	18–25	9.4	16.6
	26–35	18.0	19.6
	36–45	30.4	26.8
	46–55	28.1	24.8
	56–65	13.3	11.7
	>65	0.8	0.5
Male to female ratio	2.4
RP/FT donor ratio
North	14.2
Centre	3.4
South/Isles	3.0
Italy	5.3
Total n. of blood donations tested	21,808,352
N. of blood donations from FT donors	1,934,612 (8.9%)
N. of blood donations from RP donors	19,873,740 (91.1%)
Donation index (mean donations per year)	1.78
RP donation index (mean donations per year)	1.92
Inter-donation interval	0.52 years
N. of donations tested by:
NAT PCR	11,771,573 (54%)
NAT TMA	10,036,779 (46%)

FT: first-time; RP: repeat; NAT: nucleic acid testing; PCR: polymerase chain reaction; TMA: transcription-mediated amplification.