Morten Thronæs1,2, Trude Rakel Balstad3,4, Cinzia Brunelli3,5, Erik Torbjørn Løhre3,4, Pål Klepstad3,6,7, Ola Magne Vagnildhaug3,4, Stein Kaasa3,8, Anne Kari Knudsen3,8, Tora Skeidsvoll Solheim3,4. 1. Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Postbox 8905, 7491, Trondheim, Norway. morten.thrones@ntnu.no. 2. Cancer Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway. morten.thrones@ntnu.no. 3. Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Postbox 8905, 7491, Trondheim, Norway. 4. Cancer Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway. 5. Palliative Care, Pain Therapy and Rehabilitation Unit, Fondazione IRCCS, Istituto Nazionale Tumori, Via Venezian 1, 20133, Milan, Italy. 6. Department of Anaesthesiology and Intensive Care Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway. 7. Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology NTNU, Trondheim, Norway. 8. European Palliative Care Research Centre, Department of Oncology, Oslo University Hospital, and Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
Abstract
BACKGROUND: The pain management index (PMI) was developed to combine information about the prescribed analgesics and the self-reported pain intensity in order to assess physicians' response to patients' pain. However, PMI has been used to explore undertreatment of cancer pain. The present study explores prevalence of negative PMI and its associations to clinical variables, including the patient-perceived wish for more attention to pain. METHODS: A single-center, cross-sectional, observational study of cancer patients was conducted. Data on demographics and clinical variables, as well as patient-perceived wish for more attention to pain, were registered. PMI was calculated. Negative PMI indicates that the analgesics prescribed might not be appropriate to the pain intensity reported by the patient, and associations to negative PMI were explored by logistic regression models. RESULTS: One hundred eighty-seven patients were included, 53% had a negative PMI score. Negative PMI scores were more frequent among patients with breast cancer (OR 4.2, 95% CI 1.3, 13.5), in a follow-up setting (OR 12.1, 95% CI 1.4, 101.4), and were inversely associated to low performance status (OR 0.14, 95% CI 0.03, 0.65). Twenty-two percent of patients with negative PMI scores reported that they wanted more focus on pain management, versus 13% among patients with a non-negative PMI score; the difference was not statistically significant. CONCLUSION: A high prevalence of negative PMI was observed, but only 1/5 of patients with a negative PMI wanted more attention to pain by their physician. Our findings challenge the use of PMI as a measure of undertreatment of cancer pain.
BACKGROUND: The pain management index (PMI) was developed to combine information about the prescribed analgesics and the self-reported pain intensity in order to assess physicians' response to patients' pain. However, PMI has been used to explore undertreatment of cancer pain. The present study explores prevalence of negative PMI and its associations to clinical variables, including the patient-perceived wish for more attention to pain. METHODS: A single-center, cross-sectional, observational study of cancerpatients was conducted. Data on demographics and clinical variables, as well as patient-perceived wish for more attention to pain, were registered. PMI was calculated. Negative PMI indicates that the analgesics prescribed might not be appropriate to the pain intensity reported by the patient, and associations to negative PMI were explored by logistic regression models. RESULTS: One hundred eighty-seven patients were included, 53% had a negative PMI score. Negative PMI scores were more frequent among patients with breast cancer (OR 4.2, 95% CI 1.3, 13.5), in a follow-up setting (OR 12.1, 95% CI 1.4, 101.4), and were inversely associated to low performance status (OR 0.14, 95% CI 0.03, 0.65). Twenty-two percent of patients with negative PMI scores reported that they wanted more focus on pain management, versus 13% among patients with a non-negative PMI score; the difference was not statistically significant. CONCLUSION: A high prevalence of negative PMI was observed, but only 1/5 of patients with a negative PMI wanted more attention to pain by their physician. Our findings challenge the use of PMI as a measure of undertreatment of cancer pain.
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