Unidimensional measurement of pain intensity is the first step in the successful control of pain, and multidimensional measurement questionnaires may be used in more comprehensive pain assessment. In conclusion, patients are the best and only sources of information in quantifying their pain intensity. This study highlighted the fluctuating nature of pain intensity among cancer patients and underscored the need for careful, ongoing pain assessment and management ( 10). Using that electronic database, Zhu and colleagues identified considerable between-patient differences in longitudinal pain variability, factors associated with high pain variability, and increased risk of death related to worsening pain intensity over time among a cohort of 949 patients with advanced stage cancer ( 10). At Dana-Farber Cancer Institute, pain intensity scores have been routinely solicited and documented in the electronic medical record of patients at each clinic visit. The scarcity of longitudinal pain studies may be partially due to the lack of suitable data sets. The poor guideline adherence and widespread under-treatment may be related to the lack of regular reassessment and little understanding of the longitudinal nature of pain, because the majority of current pain studies have either applied cross-sectional designs or selected a limited number of time points to examine pain incidence or intensity. found that nearly one of two patients with cancer pain is undertreated in a review of published literature ( 8). Weingart and colleagues reported limited clinician compliance with National Comprehensive Cancer Network pain guidelines in a retrospective chart review study of 85 ambulatory patients with advanced cancer ( 9). However, despite the development of evidence-based clinical practice guidelines by the federal government and by various professional organizations, the implementation is by no means consistent and under-treatment of cancer pain is common among advanced cancer patients ( 8, 9). It is often used to determine the urgency of treatment and the selection and titration of pain control medications. Pain intensity is used as a screen that may trigger a comprehensive pain assessment. These tools are designed to measure, not only pain intensity, but also pain site, quality, and pattern, other symptoms (e.g., fear, depression, anxiety) related to pain, alleviating and aggravating factors, as well as effectiveness of treatment ( 1, 5). However, because pain is a complex experience influenced by functional, emotional, and psychosocial factors, multidimensional pain measurement tools, such as the McGill Pain Questionnaire, the Brief Pain Inventory, and the Memorial Pain Assessment Card, are recommended for more comprehensive pain assessment. In addition, the World Health Organization has developed a three-step ladder that uses a tiered categorization of pain as mild, moderate, or severe to guide cancer pain treatment ( 7). The faces pain rating scale (from smiling to distressed) is used for children or patients with cognitive impairment ( 6). The most commonly used scale to measure cancer-related pain intensity is the 11-point numeric rating scale, from 0 (no pain) to 10 (worst pain you can imagine) these scores can be categorized as none (score, 0), mild (score, 1-3), moderate (score, 4-6), and severe (score, 7-10) ( 6). These scales are highly inter-correlated and well validated among patients with pain ( 5). Pain intensity can be reliably measured by self-report using several pain scales, including the visual analogue scale, numeric rating scale, and verbal rating scale. Joint Commission developed new standards for pain assessment and management in 1999, and integrated these standards into the survey process in 2001 ( 4). To ensure that patients receive optimal pain control, the Veterans Health Administration launched the “Pain as the 5th Vital Sign” initiative in 1999, requiring a pain intensity rating (0 to 10) for all clinical encounters ( 3). More than one-third of cancer patients with pain rated their pain intensity as moderate or severe ( 2). Pain intensity is recognized as one of the most clinically relevant dimensions of the pain experience ( 1). Pain is a common, subjective, and multi-dimensional experience among patients with cancer. Policy of Dealing with Allegations of Research Misconduct.Policy of Screening for Plagiarism Process.
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