Fewer older patients were anaemic with Hb < 10 g/dL (22.8% vs. 28.4%, p < 0.05) and fewer had raised alanine transaminase (ALT) > 40 U/L as a marker of liver disease (17.1% vs. 21.3%, p < 0.05) when compared to the younger group. This evidence concerns the gene GSTM1 and liver disorder.