Joan Tranmer

Measuring the Symptom Experience of Seriously Ill Cancer and Noncancer Hospitalized Patients Near the End of Life with the Memorial Symptom Assessment Scale

The objectives of this study were twofold: (1) to explore and compare the symptom experience of seriously ill hospitalized cancer and noncancer patients near the end of life using the Memorial Symptom Assessment Scale (MSAS) and (2) to determine if the MSAS is a valid and useful measure of symptom distress for patients with noncancer conditions. This was a prospective cohort study of hospitalized patients with end-stage congestive heart disease, chronic pulmonary disease, cirrhosis, or metastatic cancer. Eligible patients were interviewed to ascertain symptom prevalence, severity and distress using the MSAS and levels of fatigue using the Piper Fatigue Scale (PFS). Sixty-six patients with metastatic cancer and 69 patients with end-stage disease were enrolled in the study. There was a significant difference in the prevalence of selected physical symptoms, but not psychological symptoms, between cancer and noncancer patients. There were no significant differences in symptom distress scores, a computed score of frequency, severity and distress, if the symptom was present. In both groups the principal components factor analysis with varimax rotation yielded one factor comprising psychological symptoms and a second factor comprising three subgroups of physical symptoms. Internal consistency was high for the psychological subscale (Cronbach alpha coefficients of 0.85 for the cancer group and 0.77 for the noncancer group) and for the physical subscale groupings, with coefficients ranging between 0.78 to 0.87. The symptom scores were significantly correlated with perceptions of fatigue. These findings show that both seriously ill cancer and noncancer patients experience symptom distress, and that the MSAS seems to be a reliable measure of symptom distress in noncancer patients, as well as with cancer patients.

LIGHT INTENSITY EXPOSURE, SLEEP DURATION, PHYSICAL ACTIVITY, AND BIOMARKERS OF MELATONIN AMONG ROTATING SHIFT NURSES

Long-term, night shiftwork has been identified as a potential carcinogenic risk factor. It is hypothesized that increased light at night exposure during shiftwork reduces melatonin production, which is associated with increased cancer risk. Sleep duration has been hypothesized to influence both melatonin levels and cancer risk, and it has been suggested that sleep duration could be used as a proxy for melatonin production. Finally, physical activity has been shown to reduce cancer risk, and laboratory studies indicate it may influence melatonin levels. A cross-sectional study of light exposure, sleep duration, physical activity, and melatonin levels was conducted among 61 female rotating shift nurses (work schedule: two 12 h days, two 12 h nights, five days off). Light intensity was measured using a light-intensity data logger, and sleep duration and physical activity were self-reported in a study diary and questionnaire. Melatonin concentrations were measured from urine and saliva samples. The characteristics of nurses working day and night shifts were similar. Light intensity was significantly higher during sleep for those working at night (p< 0.0001), while urinary melatonin levels following sleep were significantly higher among those working days (p = 0.0003). Mean sleep duration for nurses working during the day (8.27 h) was significantly longer than for those working at night (4.78 h, p< 0.0001). An inverse association (p = 0.002) between light exposure and urinary melatonin levels was observed; however, this was not significant when stratified by shift group. There was no significant correlation between sleep duration and melatonin, and no consistent relationship between physical activity and melatonin. Analysis of salivary melatonin levels indicated that the circadian rhythms of night workers were not altered, meaning peak melatonin production occurred at night. This study indicates that two nights of rotating shift work may not change the timing of melatonin production to the day among those working at night. Additionally, in this study, sleep duration was not correlated with urinary melatonin levels, suggesting it may not be a good proxy for melatonin production. (Author correspondence: anne.grundy@queensu.ca)

The epidemiology of chronic pain in Canadian men and women between 1994 and 2007: Results from the longitudinal component of the National Population Health Survey

BACKGROUND: The epidemiology of chronic pain is poorly understood due to a paucity of longitudinal studies limiting the ability to develop prevention strategies for a condition resistant to many current therapies.

The Influence of Light at Night Exposure on Melatonin Levels among Canadian Rotating Shift Nurses

Background: Shift work has been identified as a risk factor for several cancer sites in recent years, with melatonin as a potential intermediate on the proposed causal pathway. This study examined the influence of nighttime light exposure on melatonin levels among 123 rotating shift nurses. Methods: Nurses working a rotating shift schedule (two 12-hour days, two 12-hour nights, and five days off) were recruited and participated on a day and night shift in both the summer and winter seasons. Over each 48-hour study period, nurses wore a light data logger and provided two urine and four saliva samples. Results: Saliva measurements showed that the pattern of melatonin production did not differ between day and night shifts. Mean light exposure was significantly higher (P < 0.0001) when nurses were working at night, although peak melatonin levels (P = 0.65) and the daily change in melatonin levels (P = 0.80) were similar across day/night shifts. Multivariate analysis did not show an association between light exposure and melatonin levels when data from both shifts was combined; however, when data from the night shift was considered alone, a statistically significant inverse relationship between light and change in melatonin was observed (P = 0.04). Conclusion: These results show that light exposure does not seem to be strongly related to reduced melatonin production among nurses on this rapidly rotating shift schedule. Impact: Future research considering more extreme shift patterns or brighter lighting conditions could further clarify the relationship between light exposure and melatonin production in observational settings. Cancer Epidemiol Biomarkers Prev; 20(11); 2404–12. ©2011 AACR.

Understanding the supportive care needs of parents of children with cancer: an approach to local needs assessment.

The objective of this study was to conduct an assessment of supportive care needs from the perspective of parents of children diagnosed with cancer within an urban-rural region in Eastern Ontario, Canada. Guided by a conceptual framework for supportive care, the exploratory, mixed-method study used a standard needs survey and semistructured interviews. Fifteen parents completed (75% response rate) the survey, and 3 parents participated as key informants in the follow-up interview. Parents reported needs in all 6 of the need categories outlined within the Supportive Care Needs Framework. The proportion of parents expressing a need ranged from 23% to 39%. Dealing with the fear of their childs cancer spreading was frequently identified by parents. Emotional and informational needs were the 2 most frequently acknowledged categories of need. With further refinement, the use of the conceptual framework will provide a methodology for planning care based on the individual needs identified by parents of children with cancer.

Supportive care needs of parents of children with cancer: transition from diagnosis to treatment.

PURPOSE/OBJECTIVES To analyze research related to the pediatric oncology population supportive care needs from diagnosis to treatment. DATA SOURCES Articles published from 1992-2002. DATA SYNTHESIS 49 studies were included. All six categories of the Supportive Care Needs Framework were found, with most studies addressing one to three of the need categories. Informational (88%) and emotional (84%) needs were identified most frequently. CONCLUSIONS No one study examined the entire range and types of supportive care needs from diagnosis to treatment. This knowledge is key to planning appropriate care and services. Future research should be directed at understanding the full constellation of needs encountered by parents during this time. Further refinement of the Supportive Care Needs Framework is required to fully define the categories of need. IMPLICATIONS FOR NURSING Although more research is required, supportive care that focuses on informational and emotional support appears to be most important from diagnosis to treatment. Using a conceptual framework such as the Supportive Care Needs Framework provides a methodology for planning care based on needs.

A cross-sectional study of shift work, sleep quality and cardiometabolic risk in female hospital employees

Objectives Investigating the potential pathways linking shift work and cardiovascular diseases (CVD), this study aimed to identify whether sleep disturbances mediate the relationship between shift work and the metabolic syndrome, a cluster of CVD risk factors. Design Cross-sectional study. Setting A tertiary-level, acute care teaching hospital in Southeastern Ontario, Canada. Participants Female hospital employees working a shift schedule of two 12 h days, two 12 h nights, followed by 5 days off (n=121) were compared with female day-only workers (n=150). Primary and secondary outcome measures Each of the seven components of the Pittsburgh Sleep Quality Index (PSQI) was measured. Of these, PSQI global score, sleep latency and sleep efficiency were examined as potential mediators in the relationship between shift work and the metabolic syndrome. Results Shift work status was associated with poor (>5) PSQI global score (OR=2.10, 95% CI 1.20 to 3.65), poor (≥2) sleep latency (OR=2.18, 95% CI 1.23 to 3.87) and poor (≥2) sleep efficiency (OR=2.11, 95% CI 1.16 to 3.84). Although shift work was associated with the metabolic syndrome (OR=2.29, 95% CI 1.12 to 4.70), the measured components of sleep quality did not mediate the relationship between shift work and the metabolic syndrome. Conclusions Women working in a rapid forward rotating shift pattern have poorer sleep quality according to self-reported indicators of the validated PSQI and they have a higher prevalence of the metabolic syndrome compared with women who work during the day only. However, sleep quality did not mediate the relationship between shift work and the metabolic syndrome, suggesting that there are other psychophysiological pathways linking shift work to increased risk for CVD.

The symptom of pain in individuals recently hospitalized for heart failure.

The symptom of pain is not typically associated with heart failure. Yet, emerging evidence suggests that pain is an important issue for this population. Objectives: (1) To determine whether pain was reported by a cohort of individuals with heart failure at the time of discharge from hospital, at 2 and 6 weeks postdischarge; (2) To examine the profile of individuals who reported pain at discharge and to determine if there were differences from individuals who did not report pain; (3) To determine whether there was a difference in health-related quality of life between reported pain and no pain groups. Methods: This study was part of a larger randomized controlled trial with a 3-month follow-up. Data were obtained from 169 individuals diagnosed with heart failure who completed the first 6 weeks of the follow-up period. Results: At time of discharge, 68% of the cohort reported pain. Both frequency and severity of pain fluctuated throughout the study for the entire cohort. There were no sociodemographic characteristics that distinguished those who reported pain from those who did not report pain. Differences in health-related quality of life were found between the reported pain and no pain groups at discharge and week 2. Depression, worry, feeling a loss of control over ones life, and feeling as if one was a burden to family were significantly more prevalent in individuals who reported pain. Differences were also found in self-rated health status, and number of prescription medications taken daily. Throughout the 6 weeks, 63 individuals (37%) consistently reported pain and 23 (14%) never reported pain. Conclusion: Pain was a concern for this cohort of individuals diagnosed with heart failure and was noted to impact their health-related quality of life. Further research is needed into the nature of the pain and the role of pain in self-management once patients are discharged home.

A cross-sectional study of breast cancer biomarkers among shift working nurses

Objectives In 2007, the International Agency for Research on Cancer classified long-term shift work as a probable carcinogen, with the strongest evidence for breast cancer. One proposed mechanism involves night-time light exposure and decreases in melatonin, a circadian rhythmic hormone. It is hypothesised that melatonin influences patterns of sex hormone production that in turn influence breast cancer risk. This study sought to investigate the relationships of shift work history, 6-sulfatoxymelatonin (aMTs-6, the primary melatonin metabolite) and sex hormone levels among shift working nurses. Design This is a cross-sectional biomarker study. Setting 94 premenopausal nurses who work a full-time rotating shift schedule at one Ontario hospital were recruited for this study; 82 completed follow-up. Primary and secondary outcome measures Study participants provided morning void urine and fasting blood samples for the assessment of aMTs-6 and sex hormone (oestradiol, oestrone, progesterone, prolactin) levels, respectively. These data were collected at two time points (summer and winter) such that relationships between melatonin and sex hormones could be assessed with respect to two time frames of interest (acute and cross-seasonal). Results An inverse relationship between aMTs-6 and oestradiol was suggested in the winter (β=−0.18, p=0.04), but this result was not statistically significant in multivariate modelling that adjusted for age, body mass index and menstrual cycle. Likewise, while oestradiol, oestrone and progesterone levels increased with greater years of shift work history (all p<0.05), these associations were attenuated after confounder adjustment. Conclusions These results do not support the proposed relationship between melatonin and sex hormone levels as biomarkers on the pathway of shift work and breast cancer but emphasise the importance of adjusting for confounders in modelling.

Analysis of self-reported problematic tasks for pregnant women

The objective of this study was to identify major components of, and influential factors in, problematic tasks performed by pregnant women employed in education, health care and service areas. Seventy-two pregnant women were surveyed using specially designed questionnaires consisting of an Initial Survey, a Job Analysis Questionnaire and a Task Description Questionnaire. Forty-four subjects (60%) had difficulty performing at least one work task and reported 105 tasks that were problematic at work. Reaching above the head, bending forward, bending and twisting, pushing, repeating actions and working at a fast pace were identified as the task components requiring the greatest level of effort. Excessive effort, excessive time, getting tired, repetitive actions, stress and fear of injury were identified as factors that had strong associations with the six major task components. Findings of this study suggest that these task components and factors should be considered when designing, assigning or analysing tasks for working pregnant women.