“…Although studies of analgesic adherence for cancer pain are generally lacking, existing studies have identified barriers that are multifactorial and include analgesic beliefs and concerns (Gunnarsdottir, Donovan, Serlin, Voge, & Ward, 2002; Jacobsen et al, 2010; Tzeng, Chang, Chang, & Lin, 2008), psychocognitive factors such as self-efficacy and satisfaction with pain treatment (Tzeng et al, 2008; Valeberg, Miaskowski, Hanestad, Bjordal, Moum, & Rustoen, 2008), pain and pain treatment factors (pain intensity, pain impact, pain relief, and stated need for analgesics) (Tzeng et al, 2008; Valeberg et al, 2008), and sociodemographic correlates, including age (Tzeng et al, 2008), gender, (Tzeng et al, 2008; Valeberg et al, 2008), educational level (Tzeng et al, 2008), and insurance and payment type (Bryan, De La Rosa, Hill, Amadio, & Wieder, 2008). …”