Psychometric Analysis of a Persian Version of EORTC QLQ-OG25 in Oesophagogastric Cancer Patients

Cancer is the third most common cause of death following cardiovascular disease and accident (Mohebbi et al., 2008; Moradpour and Fatemi, 2013) and gastrointestinal (GI) cancers are the most frequent cancers among males and second to females’ breast cancer in Iran (Mohebbi et al., 2011). The epidemiological characteristic of upper GI cancer has markedly changed over recent decades so that oesophageal (Otterstatter et al., 2012; Zhang et al., 2012; Lin et al., 2013) and gastric (Camargo et al., 2011; Dikshit et al., 2011; Lin et al., 2011; Nagini, 2012) cancers have been decreasing in many parts of the world. Although these malignancies remain an important public health problem as the leading cancers in Iran, there were considerable variations in the sub-site of upper GI cancer in different parts of the country (Taghavi et al., 2007; Mohagheghi et al., 2009; Mousavi et al., 2009; Pourshams et al., 2010; Najafi et al., 2011; Sepanlou et al.,