Table 1.

Characteristics of birth cohort veterans tested for HCV

Characteristics	N (% overall)	% Tested for HCV	% of overall HCV Ab +ve	% of overall HCV RNA +ve
Overall	4,221,135	51%	8.1%	5.4%
○ Year of birth:
• 1945-1949	1,683,073 (39.9%)	53%	6.0%	3.7%
• 1950-1954	1,002,366 (23.7%)	53%	11.9%	8.5%
• 1955-1959	794,945 (18.8%)	51%	10.8%	7.7%
• 1960-1965	740,751 (17.5%)	43%	4.5%	2.5%
○ Sex:
• Male	3,726,077 (88.3%)	53%	8.7%	5.9%
• Female	495,058 (11.7%)	35%	3.0%	1.5%
○ Race:
• American Indian/Alaska Native	29,661 (0.7%)	52%	7.9%	5.9%
• Asian	26,192 (0.6%)	50%	2.6%	1.6%
• Black/African American	666,983 (15.8%)	62%	14.7%	10.5%
• Native Hawaiian/Pacific Islander	45,957 (1.1%)	59%	8.7%	6.0%
• Declined to Answer/Unknown	1,141,956 (27.1%)	35%	5.1%	3.3%
• White	2,310,386 (54.7%)	55%	7.6%	5.0%
○ ALT:
• ≤40	2,631,683 (56.1%)	57%	6.5%	3.2%
• >40	880,511 (20.2%)	67%	18.8%	16.1%
• Not done or missing	708,941 (16.8%)	5%	0.5%	0.2%
○ FIB-4:
• <1.45	2,369,163 (56.1%)	58%	6.8%	3.3%
• 1.45-3.25	852,230 (20.2%)	63%	12.6%	9.3%
• >3.25	186,697 (4.4%)	80%	33.8%	30.5%
• Missing values	813,045 (19.3%)	9%	0.9%	0.5%
○ APRI:
• ≤0.5	2,933,008 (69.5%)	58%	6.5%	3.3%
• >0.5-<1.5	401,323 (9.5%)	73%	28.4%	20.7%
• ≥1.5	102,958 (2.4%)	84%	45.6%	42.8%
• Missing values	783,846 (18.6%)	9%	0.8%	0.4%
○ HIV Status
• Positive	25,059 (0.6%)	84.1%	31.9%	27.1%
• Negative	4,196,076 (99.4%)	50.5%	7.9%	5.3%
○ HBV Status
• Positive	384,470 (9.1%)	85.8%	34.4%	26.9%
• Negative	3,836,665 (90.9%)	47.2%	5.4%	3.2%
○ Visits
• Q1# (<=13)	1,097,384 (26.0%)	24%	2.8%	1.3%
• Q2 (14-44)	1,022,102 (24.2%)	47%	5.9%	3.5%
• Q3 (45-113)	1,032,887 (24.5%)	60%	9.2%	6.1%
• Q4 (>113)	1,068,762 (25.3%)	72%	14.4%	10.8%

^#Q1-4: Quartiles; FIB-4, APRI calculations detailed in Methods, HIV: Human Immunodeficiency virus, HBV: Hepatitis B virus