Table 2.
Injecting drug use (IDU) risk status of 25 521 individuals diagnosed with HCV in Scotland to 31 December 2009, according to four data sources [(a) HCV Diagnosis, (b) HIV Test, (c) combined hospital discharges/deaths, and (d) SDMD]. 95% confidence intervals were derived using the profile likelihood
| IDU risk identified in 1 or more of the following 4 data sources | No. of HCV-diagnosed IDUs | |||
|---|---|---|---|---|
| (a) HCV Diagnosis | (b) HIV Test | (c) SMR01/Deaths | (d) SDMD | |
| Y | Y | Y | Y | 2814 |
| N | Y | Y | Y | 513 |
| Y | N | Y | Y | 1914 |
| N | N | Y | Y | 801 |
| Y | Y | N | Y | 2686 |
| N | Y | N | Y | 520 |
| Y | N | N | Y | 2083 |
| N | N | N | Y | 1079 |
| Y | Y | Y | N | 623 |
| N | Y | Y | N | 126 |
| Y | N | Y | N | 526 |
| N | N | Y | N | 308 |
| Y | Y | N | N | 1880 |
| N | Y | N | N | 599 |
| Y | N | N | N | 2310 |
| N | N | N | N | — |
| Total number of HCV-diagnosed persons identified with IDU risk from the four data sources (a)–(d) | 18 782 | |||
| Estimated number of HCV-diagnosed persons with IDU risk from log-linear modelling, but were not identified as such from the four data sources (a)–(d) | 2484 | |||
| Estimated total number of HCV-diagnosed IDUs (95% confidence interval) | 21 266 (20 582–22 140) | |||
SMR01/Deaths, Scottish Morbidity Records hospital discharge/deaths data; SDMD, Scottish drug misuse database; Y, Yes; N, no.
Backward step-wise fitting of log-linear model (residual deviance of 0 on 0 residual d.f.) included main effects for data sources (a) HCV diagnoses, (b) HIV test, (c) hospital discharge/deaths and (d) SDMD, and all two-way and three-way interactions between data sources.