Table 2.
Hepatitis C Virus Testing and Treatment Data Table for OTP Patients Enrolled in 2013–2016
| 2013–2014 (n = 9039) | 2015–2016 (n = 8927) | |||||
|---|---|---|---|---|---|---|
| Characteristics | n | n/n | % | n | n/n | % |
| No. with at least one HCV antibody test performed | 4744 | 4744/9039 | 52.5% | 6545 | 6545/8927 | 73.3% |
| HCV antibody positive | 1720 | 1720/4744 | 36.26% | 3313 | 3313/6545 | 50.6% |
| No. with at least 1 HCV qualitative viral load test performeda | n/a | n/a | n/a | 2987 | 2987/3313 | 90.2% |
| HCV qualitative VL reactive | n/a | n/a | n/a | 1828 | 1828/2987 | 61.2% |
| No. with at least 1 quantitative VL test performed | 270 | 270/1720 | 15.7% | 946b | 946/1828 | 51.8% |
| HCV quantitative VL detectable | 234 | 234/1720 | 13.6% | 939 b | 939/946 | 99.3% |
| No. with active viremia (by at least 1 qualitative or 1 quantitative VL test) | 234 | 234/1720 | 13.6% | 2085c | 2085/3313 | 62.9% |
| No. who received HCV treatment among all those with documented viremia | 28 | 28/234 | 12.0% | 420 | 420/2085 | 20.1% |
| No. who received HCV treatment after successful linkage to HCV care | 28 | 28/234 | 12.0% | 420 | 420/939 | 44.7% |
| No. who achieved SVR | 25 | 25/28 | 89.3% | 414 | 414/420 | 98.6% |
Abbreviations: HCV, hepatitis C virus infection; OTP, opioid treatment program; SVR, sustained virologic response; VL, viral load.
aApplies only to those HCV tested in the 2015–2016 time period as qualitative HCV VL testing wasn’t introduced into the OTP until 2015.
bAs reflex VL testing was rolled out in a staggered fashion in the first months of 2015, numbers tested for quantitative VL include both 761 who first had on-site reflex qualitative VL testing as well as 185 who were referred for quantitative VL testing after antibody testing only either in late 2014 or early 2015.
cAlthough 1828 individuals had reactive HCV qualitative VL tests, and 939 individuals had reactive HCV quantitative VL tests, 680 individuals were found to have viremia on both tests (data not shown); hence, (1828 + 939) – 680 = 2085 individuals with active infection.