R. De Wit et al., Empirical comparison of commonly used measures to evaluate pain treatment in cancer patients with chronic pain, J CL ONCOL, 17(4), 1999, pp. 1280-1287
Purpose: There is limited consensus about the most appropriate measures to
evaluate the adequacy of pain treatment in cancer patients. There are no kn
own studies describing commonly used measures to simultaneously evaluate th
e adequacy of cancer pain treatment. The purpose of this study was to compa
re measures, which are frequently reported in the literature, to assess the
adequacy of pain treatment in cancer patients with chronic pain. This stud
y was part of a randomized controlled trial.
Patients and Methods: In total, 313 cancer patients with a pain duration of
at least 1 month were evaluated. After a baseline measure in the hospital,
patients were followed up at 2, 4, and 8 weeks after discharge at home. Ad
equacy of cancer pain treatment was evaluated by means of four different ty
pes of outcome measures. The four types included three pain intensity marke
rs based on patients' pain intensity, a pain relief scale, a patient satisf
action scale, and three pain management indexes that related patients' pain
medication with pain intensity,
Results: The proportion of inadequately treated pain patients varied extrem
ely. Depending on the outcome measure used, the percentage of inadequately
treated patients ranged from 16% to 91%. The choice of measure, rather than
pain treatment itself, determined the proportion of inadequacy.
Conclusion: There is an urgent need for consensus about how to evaluate the
effectiveness of pain treatment. Studies that evaluate adequacy of pain tr
eatment should be interpreted with caution. Further research is necessary t
o elucidate the validity and reliability of outcome measures simultaneously
, (C) 1999 by American Society of Clinical Oncology.