Study population flow chart.
We excluded participants with missing liver fibrosis score data, possible acute hepatitis (aspartate or alanine aminotransferase ≥250 international units per liter), and severe thrombocytopenia (platelet count <50,000 per microliter). Liver fibrosis score was missing because of missing platelet count in 24,488, aspartate aminotransferase in 34,860, or alanine aminotransferase in 33,255. Some participants had multiple reasons for exclusion.