JOURNAL ARTICLE

Outreach screening of drug users for cirrhosis with transient elastography

Belinda K Moessner, Tina R Jørgensen, Merete Skamling, Mogens Vyberg, Peter Junker, Court Pedersen, Peer B Christensen
Addiction 2011, 106 (5): 970-6
21182552

AIMS: Transient elastography (TE) is a non-invasive sensitive tool for diagnosing cirrhosis in hospital-based cohorts. This study aimed to evaluate TE as a screening tool for cirrhosis among drug users.

DESIGN: Cross-sectional study.

SETTING: All treatment centres in the county of Funen, Denmark.

PARTICIPANTS: Drug users attending treatment centres during the presence of the study team.

MEASUREMENTS: Liver stiffness measurements (LSM) by transient elastography using the Fibroscan device; blood tests for viral hepatitis, HIV infection and hyaluronic acid (HA) levels; and routine liver tests. Individuals with LSM ≥ 8 kPa were referred to the hospital for treatment evaluation. Individuals with LSM ≥ 12 kPa were recommended a liver biopsy.

FINDINGS: Among 175 drug users negative for hepatitis C, 13% had LSM = 8-11.9 kPa and 4% had LSM ≥ 12 kPa; elevated LSM was associated with a body mass index (BMI) > 30. Among 128 drug users with chronic hepatitis C, 19.5% had LSM = 8-11.9 kPa and 21.1% had LSM ≥ 12 kPa (P < 0.001). Repeat LSM at liver biopsy performed a median 3 months after screening showed a significant decrease (<12 kPa) among 30% (six of 20), and this was independent of alcohol consumption, BMI, age and gender. In 29 patients where liver biopsy was performed a LSM ≥ 16 kPa predicted cirrhosis with 88.9% sensitivity and 90% specificity.

CONCLUSIONS: Transient elastography is a feasible screening tool for cirrhosis among drug users. Transient elastography identifies severe liver fibrosis in a significant proportion of drug users with hepatitis C infections but management should not be based on a single elevated liver stiffness measurement.

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