SMN1 and autoimmune hepatitis: Compared with the 50 patients with AIH, the prevalence of ANA-H and SMA-AA were lower in the patients with AHE (35.1% vs. 82.1%, P < 0.05; and 4.4% vs. 88.4%, P < 0.05, respectively); the ANA and SMA titres were also lower (both 1:320 vs. 1:1000, P < 0.05).