Cancer and breakthrough pain's impact on a diverse population.

BACKGROUND: Although breakthrough pain (BTP; pain flares interrupting well-controlled baseline pain) is common among patients with cancer, its prevalence, characteristics, and impact on health-related quality of life (HRQOL) are poorly understood in ethnic minorities. METHODS: This comparative study examines ethnic and gender differences in BTP characteristics and impact on HRQOL. Patients with stage III or IV cancer of the breast, prostate, colorectal, or lung, or stage II-IV multiple myeloma with BTP completed surveys (upon initial assessment, 3 months, and 6 months) assessing consistent pain, BTP, depressed affect, active coping ability, and HRQOL. RESULTS: Respondents (N = 96) were 75% white, 66% female with a mean age of 56 +/- 10 years. All subjects experienced significant psychological distress, but there were no racial differences in depression prevalence. Minorities reported significantly greater severity for consistent pain at its worst (P = 0.009), least (P < or = 0.001), on average (P = 0.004), and upon initial assessment (P = 0.04) as well as greater severity for BTP at its worst (P = 0.03), least (P = 0.02), and at initial assessment (P = 0.008). Although minorities reported more flare types (3.0 vs 1.8, P = 0.001), there were no significant ethnic differences in the duration, quality, or location of pain flares. Minorities consistently reported poorer outcomes on each HRQOL subscale (physical, role, emotional, cognitive, and social functioning) measured, although not statistically significant, as well as poorer QOL symptom control (P = 0.08) including lower dyspnea control (P = 0.002). CONCLUSIONS: Overall, minorities experienced greater consistent and breakthrough pain as well as poorer HRQOL. These data suggest further health care disparities in the cancer and pain experience for minorities.

Consistent and breakthrough pain in diverse advanced cancer patients: a longitudinal examination.

Although cancer pain, both consistent and breakthrough pain ([BTP]; pain flares interrupting well-controlled baseline pain), is common among cancer patients, its prevalence, characteristics, etiology, and impact on health-related quality of life (HRQOL) are poorly understood. This longitudinal study examined the experience and treatment of cancer-related pain over six months, including an evaluation of ethnic differences. Patients with Stage III or IV breast, prostate, colorectal, or lung cancer, or Stage II-IV multiple myeloma with BTP completed surveys on initial assessment and at three and six months. Each survey assessed consistent pain, BTP, depressed affect, active coping ability, and HRQOL. Among the respondents (n=96), 70% were white, 66% were female, and had a mean age of 56+/-10 years. Nonwhites reported significantly greater severity for consistent pain at its worst (P = 0.009), least (P < or = 0.001), on average (P = 0.004), and upon initial assessment (P = 0.04), and greater severity for BTP at its worst (P = 0.03), least (P = 0.02), and at initial assessment (P = 0.008). Women also had higher levels of some BTP measures. Ethnic disparities persisted when data estimation techniques were used. Examined longitudinally, consistent pain on average and several BTP measures reduced over time, although not greatly, indicating the persistence of pain in the cancer experience. These data provide evidence for the significant toll of cancer pain, while demonstrating further health care disparities in the cancer pain experience.

Outbreaks of adult gastroenteritis traced to a single genotype of rotavirus.

Between November 1998 and December 2000, the Centers for Disease Control and Prevention screened samples from 263 outbreaks of gastroenteritis in the United States and identified 3 that were associated with rotavirus among adults. Rotaviruses from each outbreak were further characterized by reverse-transcription polymerase chain reaction. Surprisingly, all specimens were of serotype G2, a strain that is, as determined by high-stringency hybridization analysis, genetically distinct in all 11 gene segments from the other common rotavirus strains in circulation. The unusual coincidence of identification of only G2 strains in these 3 outbreaks of rotavirus gastroenteritis among adults is similar to results from other studies, in which G2 strains were found in association with more-severe disease in children than other rotavirus serotypes and in association with outbreaks of diarrhea among adults in Japan. Although rotavirus infections in adults are relatively uncommon, which indicates that good overall protective immunity exists, the predominance of G2 strains in outbreaks that have occurred in adults suggests that natural immunity to more common strains does not always provide adequate heterotypic immunity to G2 strains. For the rotavirus vaccines under development, special attention may need to be paid to protection against G2 strains.