GSTM1 and colorectal carcinoma: The risk of dying from other cancers than CRC also increased with increasing f-Hb, from an aHR of 1.33 (95% CI: 1.24, 1.42) at f-Hb 7.1–11.9 μg Hb/g faeces to 1.77 (95% CI: 1.64, 1.91) at f-Hb ≥60.0 μg Hb/g faeces.