Comparison of numerical and verbal rating scales to measure pain exacerbations in patients with chronic cancer pain

[1] Dworkin RH(2005)Core outcome measures for chronic pain clinical trials: IMMPACT recommendations Pain 113 9-19

[2] Turk DC(2006)Developing patient-reported outcome measures for pain clinical trials: IMMPACT recommendations Pain 125 208-215

[3] Farrar JT(2002)Pain measurement tools and methods in clinical research in palliative care: recommendations of an Expert Working Group of the European Association of Palliative Care J Pain Symptom Manage 23 239-255

[4] Haythornthwaite JA(2007)Standardizing patient-reported outcomes assessment in cancer clinical trials: a patient-reported outcomes measurement information system initiative J Clin Oncol 25 5106-5112

[5] Jensen MP(2005)American pain society recommendations for improving the quality of acute and cancer pain management: American Pain Society Quality of Care Task Force Arch Intern Med 165 1574-1580

[6] Katz NP(2008)Symptom assessment in palliative care: a need for international collaboration J Clin Oncol 26 3867-3873

[7] Kerns RD(2008)Pain assessment tools in palliative care: an urgent need for consensus Palliat Med 22 895-903

[8] Stucki G(2006)Pain assessment tools: is the content appropriate for use in palliative care? J Pain Symptom Manage 32 567-580

[9] Allen RR(1975)Methodological problems in the measurement of pain: a comparison between the verbal rating scale and the visual analogue scale Pain 1 379-384

[10] Bellamy N(1981)Measurement of pain: patient preference does not confound pain measurement Pain 10 241-248

[1] Dworkin RH(2005)Core outcome measures for chronic pain clinical trials: IMMPACT recommendations Pain 113 9-19

[2] Turk DC(2006)Developing patient-reported outcome measures for pain clinical trials: IMMPACT recommendations Pain 125 208-215

[3] Farrar JT(2002)Pain measurement tools and methods in clinical research in palliative care: recommendations of an Expert Working Group of the European Association of Palliative Care J Pain Symptom Manage 23 239-255

[4] Haythornthwaite JA(2007)Standardizing patient-reported outcomes assessment in cancer clinical trials: a patient-reported outcomes measurement information system initiative J Clin Oncol 25 5106-5112

[5] Jensen MP(2005)American pain society recommendations for improving the quality of acute and cancer pain management: American Pain Society Quality of Care Task Force Arch Intern Med 165 1574-1580

[6] Katz NP(2008)Symptom assessment in palliative care: a need for international collaboration J Clin Oncol 26 3867-3873

[7] Kerns RD(2008)Pain assessment tools in palliative care: an urgent need for consensus Palliat Med 22 895-903

[8] Stucki G(2006)Pain assessment tools: is the content appropriate for use in palliative care? J Pain Symptom Manage 32 567-580

[9] Allen RR(1975)Methodological problems in the measurement of pain: a comparison between the verbal rating scale and the visual analogue scale Pain 1 379-384

[10] Bellamy N(1981)Measurement of pain: patient preference does not confound pain measurement Pain 10 241-248