GSTM1 and colorectal carcinoma: It has previously been demonstrated, from SBoSP data, that women have lower f-Hb than men.17 This is also true when comparing the median f-Hb of those diagnosed with CRC.18 As well as higher ICP, other indicators of poorer CRC outcomes are also more strongly associated with women including a higher percentage of emergency CRC presentations19 and later stage IC.