“…This questionnaire is frequently used in cancer of the colorectum (Hung et al, 2013;Smith et al, 2013). The questionnaire has been validated across many cultures and disease conditions and was found to have adequate acceptable psychometric properties (Schwenk et al, 2004;Huang et al, 2007;Jayasekara et al, 2008;Luckett et al, 2011;Uwer et al, 2011;Yakar and Pinar, 2013). Details of its application, interpretation and reference values for comparison among different groups of patients are readily available (King, 1996;Michelson et al, 2000;Fayers, 2001;Arraras Urdaniz et al, 2008;Finck et al, 2012).…”