Characteristics of the studies included in the meta-analysis
| Year | Investigators | Country | Study period | BASM | Non-BASM | Outcomes |
| 2019 | Fanna et al13 | France | 1986–2015 | 118 | 1002 | 20-year NLS |
| 2019 | Murase et al11 | Japan | 2012–2015 | 6 | 121 | JC (TB less than the upper limit value of normal range); 1-year NLS |
| 2015 | Nio et al7 | Japan | 1972–2014 | 11 | 244 | JC (TB <2.0 mg/dL); early cholangitis; HPS/PPH; 20-year NLS |
| 2012 | de Vries et al14 | The Netherlands | 1987–2008 | 10 | 200 | 4-year NLS |
| 2008 | Davenport et al9 | London | 1994–2005 | 28 | 177 | JC (TB <20 µmol/L); 2-year NLS |
| 2006 | Shneider et al10 | USA | 1997–2000 | 11 | 89 | 2-year NLS with TB <6.0 mg/dL |
| 1995 | Vazquez et al12 | Spain | 1984–1993 | 11 | 77 | JC |
BASM, biliary atresia splenic malformation; HPS, hepatopulmonary syndrome; JC, jaundice clearance; NLS, native liver survival; PPH, portopulmonary hypertension; TB, total bilirubin.