Pain assessment and registration in medical oncology clinics: operationalised through the lens of health care professionals and patients.

Pain is a common symptom in patients who survive cancer and in those who live with progressive advanced disease. Systematic screening and documentation of pain are necessary to improve the quality of cancer pain treatment, because a key pain-related barrier is that patients are reluctant to discuss pain, due to fear that reporting pain will distract the healthcare professional from their cancer treatment. This study adopted an explanatory sequential mixed-methods design.