Inger Schou Bredal1, Nina A Smeby2, Stig Ottesen3, Torhild Warncke4, Ellen Schlichting4. 1. Oslo University Hospital, Oslo, Norway; University of Oslo, Oslo, Norway. Electronic address: i.s.bredal@medisin.uio.no. 2. University of Oslo, Oslo, Norway. 3. Oslo University Hospital, Oslo, Norway; University of Oslo, Oslo, Norway. 4. Oslo University Hospital, Oslo, Norway.
Abstract
CONTEXT: According to the literature, 25%-60% of women treated for breast cancer, regardless of the stage, experience pain. Many risk factors have been suggested, with many possible confounding factors. OBJECTIVES: The aim was to investigate psychosocial, surgical, and medical factors associated with chronic pain by comparing breast cancer survivors with chronic pain with survivors without chronic pain. In addition, we investigated the prevalence, intensity, and body location of chronic pain after breast cancer treatment nationwide. METHODS: A nationwide postal survey of 1332 women who received surgery and adjuvant therapy for breast cancer in Norway two to six years before the onset of this study. RESULTS: A total of 832 women (63%) returned the questionnaires, and 41% reported pain, of which 51% had mild, 41% moderate, and 8% severe pain. Among the women who experienced pain, 33.8% reported symptoms and signs of neuropathic pain. Young age (odds ratio [OR], 0.95; 95% CI, 0.93-0.98; P < 0.0001), axillary lymph node dissection with subsequent chemotherapy and radiotherapy (OR, 1.69; 95% CI, 1.07-2.67; P = 0.02), other illness that caused pain (OR, 2.37; 95% CI, 1.72-3.26; P < 0.0001), depression (OR, 2.07; 95% CI, 1.25-3.40; P = 0.004), and anxiety (OR, 1.83; 95% CI, 1.26-2.66; P = 0.002) were associated with chronic pain. CONCLUSION: Young age, previous comorbidities (such as back pain, arthritis, arthrosis, and fibromyalgia), and combined treatment with axillary lymph node dissection, chemotherapy, and radiotherapy were risk factors for chronic pain. Whether depression or anxiety is a risk factor for chronic pain remains unclear.
CONTEXT: According to the literature, 25%-60% of women treated for breast cancer, regardless of the stage, experience pain. Many risk factors have been suggested, with many possible confounding factors. OBJECTIVES: The aim was to investigate psychosocial, surgical, and medical factors associated with chronic pain by comparing breast cancer survivors with chronic pain with survivors without chronic pain. In addition, we investigated the prevalence, intensity, and body location of chronic pain after breast cancer treatment nationwide. METHODS: A nationwide postal survey of 1332 women who received surgery and adjuvant therapy for breast cancer in Norway two to six years before the onset of this study. RESULTS: A total of 832 women (63%) returned the questionnaires, and 41% reported pain, of which 51% had mild, 41% moderate, and 8% severe pain. Among the women who experienced pain, 33.8% reported symptoms and signs of neuropathic pain. Young age (odds ratio [OR], 0.95; 95% CI, 0.93-0.98; P < 0.0001), axillary lymph node dissection with subsequent chemotherapy and radiotherapy (OR, 1.69; 95% CI, 1.07-2.67; P = 0.02), other illness that caused pain (OR, 2.37; 95% CI, 1.72-3.26; P < 0.0001), depression (OR, 2.07; 95% CI, 1.25-3.40; P = 0.004), and anxiety (OR, 1.83; 95% CI, 1.26-2.66; P = 0.002) were associated with chronic pain. CONCLUSION: Young age, previous comorbidities (such as back pain, arthritis, arthrosis, and fibromyalgia), and combined treatment with axillary lymph node dissection, chemotherapy, and radiotherapy were risk factors for chronic pain. Whether depression or anxiety is a risk factor for chronic pain remains unclear.
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