Publications

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Abstract. Background: Over the last decades, converging forces in hospital care, including cost-containment policies, rising healthcare demands and nursing shortages, have driven the search for new operational models of nursing care delivery that maximize the use of available nursing resources while ensuring safe, high-quality care. Little is known, however, about the distinctive features of these emergent nursing care models. This article contributes to filling this gap by presenting a theoretically and empirically grounded taxonomy of nursing care organization models in the context of acute care units in Quebec and comparing their distinctive features. Methods. This study was based on a survey of 22 medical units in 11 acute care facilities in Quebec. Data collection methods included questionnaire, interviews, focus groups and administrative data census. The analytical procedures consisted of first generating unit profiles based on qualitative and quantitative data collected at the unit level, then applying hierarchical cluster analysis to the units profile data. Results: The study identified four models of nursing care organization: two professional models that draw mainly on registered nurses as professionals to deliver nursing services and reflect stronger support to nurses professional practice, and two functional models that draw more significantly on licensed practical nurses (LPNs) and assistive staff (orderlies) to deliver nursing services and are characterized by registered nurses perceptions that the practice environment is less supportive of their professional work. Conclusions: This study showed that medical units in acute care hospitals exhibit diverse staff mixes, patterns of skill use, work environment design, and support for innovation. The four models reflect not only distinct approaches to dealing with the numerous constraints in the nursing care environment, but also different degrees of approximations to an ideal nursing professional practice model described by some leaders in the contemporary nursing literature. While the two professional models appear closer to this ideal, the two functional models are farther removed.

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Purpose: Anxiety is common in patients undergoing radiation therapy (RT) and in their family caregivers (FCs). Little is known about individual differences in anxiety trajectories during and after RT. This study aimed to identify distinct latent classes of oncology patients and their FCs based on self-reported anxiety symptoms from the beginning to four months after the completion of RT. Method: Using growth mixture modeling (GMM), longitudinal changes in Spielberger State Anxiety Inventory (STAI-S) scores among 167 oncology outpatients with breast, prostate, lung, or brain cancer and 85 FCs were evaluated to determine distinct anxiety symptom profiles. STAI-S scores were assessed just prior to, throughout the course of, and for four months following RT (total of 7 assessments). Baseline trait anxiety and depressive symptoms (during and after RT) were also assessed. Results: The GMM analysis identified three latent classes of oncology patients and FCs with distinct trajectories of state anxiety: Low Stable (n = 93, 36.9%), Intermediate Decelerating (n = 82, 32.5%), and High (n = 77, 30.6%) classes. Younger participants, women, ethnic minorities, and those with children at home were more likely to be classified in the High anxiety class. Higher levels of trait anxiety and depressive symptoms, at the initiation of RT, were associated with being in the High anxiety class. Conclusions: Subgroups of patients and FCs with high, intermediate, and low mean levels of anxiety during and after RT were identified with GMM. Additional research is needed to better understand the heterogeneity of symptom experiences as well as comorbid symptoms in patients and FCs.

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Context. Radiation therapy (RT) is a common treatment for prostate cancer. Despite available research, prostate cancer patients report that information about side effects is their most important unmet need. Additional research is needed that focuses on specific dimensions of the patient's symptom experience. Objectives. The study's purposes were to evaluate the trajectories of occurrence, severity, and distress of the six most prevalent symptoms reported by patients undergoing RT for prostate cancer and the effects of selected demographic and clinical characteristics on these trajectories. Methods. Patients completed the Memorial Symptom Assessment Scale 11 times before, during, and after RT. For problems with urination, pain, lack of energy, feeling drowsy, difficulty sleeping, and diarrhea, the trajectories of occurrence, severity, and distress were evaluated using multilevel generalized linear models. Results. Across all three dimensions, pain, lack of energy, feeling drowsy, and difficulty sleeping followed a decreasing linear trend. Problems with urination and diarrhea demonstrated more complex patterns of change over time. Conclusion. Although longitudinal data on pain, lack of energy, feeling drowsy, and difficulty sleeping are limited, they are highly prevalent symptoms in these patients. In addition, diarrhea becomes a significant problem for these patients over the course of RT. A number of demographic and clinical characteristics affect the trajectories of these common symptoms differentially.

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Objective: To characterize specific types of sleep problems experienced by adults with HIV. Method: The design was cross-sectional involving sleep questionnaires, diaries, and wrist actigraphy. The convenience sample included 290 adults living with HIV, 22-77 years of age. Measures included self-report for sleep onset latency, and wrist actigraphy estimates of total sleep time at night, wake after sleep onset, and daytime sleep. Results: Nearly half (45%) of the sample slept < 6 h per night. Difficulty falling asleep was reported by 34%, and 56% had fragmented sleep according to actigraphy; 20% had both problems, and 30% were good sleepers. Participants reporting difficulty falling asleep had actigraphy and clinical measures similar to the good sleepers, but subjectively they experienced greater sleep disturbance and symptom burden (particularly anxiety and morning fatigue) and reported more use of sleep medication. Participants with fragmented sleep reported low levels of sleep disturbance and symptom burden similar to the good sleepers, despite actigraphy measures indicating they obtained less sleep both at night and during the day. Sleep fragmentation was also associated with sociodemographic factors and slightly lower CD4+ T-cell counts. Participants reporting both sleep problems had actigraphy and clinical profiles similar to those who had only fragmented sleep, but their symptom experience was similar to participants with only sleep initiation difficulties. Conclusions: Findings support the need for targeting efforts to improve sleep for the majority of adults living with HIV/AIDS and tailoring interventions to the specific type of sleep problem regardless of the person's clinical and demographic profile.

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OBJECTIVE: CYP2B6 variation predicts pharmacokinetic characteristics of its substrates. Consideration for underlying genetic structure is critical to protect against spurious associations with the highly polymorphic CYP2B6 gene. DESIGN: The effect of CYP2B6 variation on response to its substrates, nonnucleoside reverse transcriptase inhibitors (NNRTIs), was explored in the Women's Interagency HIV Study. METHODS: Five putative functional polymorphisms were tested for associations with virologic suppression within 1 year after NNRTI initiation in women naive to antiretroviral agents (n=91). Principal components were generated to control for population substructure. Logistic regression was used to test the joint effect of rs3745274 and rs28399499, which together indicate slow, intermediate, and extensive metabolizers. RESULTS: Rs3745274 was significantly associated with virologic suppression [odds ratio=3.61, 95% confidence interval (CI) 1.16-11.22, P trend=0.03]; the remaining polymorphisms tested were not significantly associated with response. Women classified as intermediate and slow metabolizers were 2.90 (95% CI 0.79-12.28) and 13.44 (95% CI 1.66 to infinity) times as likely to achieve virologic suppression compared to extensive metabolizers after adjustment for principal components (P trend=0.005). Failure to control for genetic ancestry resulted in substantial confounding of the relationship between the metabolizer phenotype and treatment response. CONCLUSION: The CYP2B6 metabolizer phenotype was significantly associated with virologic response to NNRTIs; this relationship would have been masked by simple adjustment for self-reported ethnicity. Given the appreciable genetic heterogeneity that exists within self-reported ethnicity, these results exemplify the importance of characterizing underlying genetic structure in pharmacogenetic studies. Further follow-up of the CYP2B6 metabolizer phenotype is warranted, given the potential clinical importance of this finding.

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Background: To meet the complex needs of patients with serious illness, health professional students require education in basics aspects of palliative care, including how to work collaboratively on an interprofessional team. Objectives: An educational program was created, implemented, and evaluated with students in medicine, nursing, chaplaincy, and social work. Five learning objectives emphasized spiritual, cultural, and interprofessional aspects of palliative care. Design: The program blended two sequential components: an online interactive, case-based learning module, and a live, dynamic simulation workshop. Measurements: Content analysis was used to analyze students' free-text responses to four reflections in the online case, as well as open-ended questions on students' postworkshop questionnaires, which were also analyzed quantitatively. Results: Analysis of 217 students' free-text responses indicated that students of all professions recognized important issues beyond their own discipline, the roles of other professionals, and the value of team collaboration. Quantitative analysis of 309 questionnaires indicated that students of all professions perceived that the program met its five learning objectives (mean response values>4 on a 5-point Likert scale), and highly rated the program and its two components for both educational quality and usefulness for future professional work (mean response values approximately>4). Conclusions: This innovative interprofessional educational program combines online learning with live interactive simulation to teach professionally diverse students spiritual, cultural, and interprofessional aspects of palliative care. Despite the challenge of balanced professional representation, this innovative interprofessional educational program met its learning objectives, and may be transferable for use in other educational settings.

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Objective: Treatment decision-making may be hindered by a lack of knowledge about the care options of curative, palliative, and hospice care. Our purpose was to create and validate an instrument to measure knowledge of these care options, the Knowledge of Care Options (KOCO) instrument. Methods: We began by generating a pool of true-false items. Experts (n=32) evaluated items in two rounds of review. For each round, we calculated Content Validity Indexes for each item and for the total scale (S-CVI). Items were revised or dropped as indicated. The clarity and acceptability of KOCO were assessed through cognitive interviews with 10 men and women with cancer. We pilot-tested KOCO with a target population sample of 23 women with metastatic breast cancer as part of larger study testing self-management training materials that included a module on care options. Results: Following expert review, the S-CVI was 85.2%, and the KOCO consisted of 11 items. Cognitive interviews showed KOCO to be clear and acceptable. The KR-20 test revealed high internal consistency of 0.89. In the pilot test, the mean pre-test score was 9.3 items correct (SD 1.29). The mean post-test score was 10.21 items correct (SD 0.92). KOCO captured change in knowledge of care options (signed rank test=42.5, p<0.006). Conclusions: KOCO is a brief, acceptable instrument capable of assessing knowledge of curative, palliative, and hospice care. Additional testing is needed with larger samples to assess the utility of KOCO for use with various patient populations, family caregivers, and clinicians.

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The National Consensus Project for Quality Palliative Care (NCP) has put forth eight domains of clinical practice guidelines that address the multidisciplinary nature of palliative and end-of-life (EOL) care. Extant surveys to assess education needs of palliative and EOL workers, however, have been constructed for individual professions. Thus we developed the End-of-life Professional Caregiver Survey (EPCS) as an instrument for assessing the palliative and EOL care-specific educational needs of multidisciplinary professionals.

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Data on the impact of student, teacher, and principal racial and gender composition in urban schools on teacher work outcomes are limited. This study, a secondary data analysis of White and Black urban public school teachers using data taken from the restricted use 2003-04 Schools and Staffing Survey (SASS), examines the effects of relational demography on teacher job satisfaction adjusting for other known determinants of job satisfaction. Relational demography is conceptualized as a set of racial and gender congruency items between teachers and principals, teachers and teachers, and teachers and students. The results of the study show that some components of relational demography directly affect teacher job satisfaction, over and above the effects of work-related attitudes.

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Introduction: Antiretroviral treatment (ART) and pre-exposure prophylaxis (PrEP) have demonstrated efficacy as new human immunodeficiency virus-1 (HIV-1) prevention approaches for HIV-1 serodiscordant couples. Methods: Among Kenyan HIV-1 serodiscordant heterosexual couples participating in a clinical trial of PrEP, we conducted a cross-sectional study and used descriptive statistical methods to explore couples' willingness to use antiretrovirals for HIV-1 prevention. The study was conducted before July 2011, when studies among heterosexual populations reported that ART and PrEP reduced HIV-1 risk. Results: For 181 couples in which the HIV-1-infected partner had a CD4 count 350 cells per microliter and had not yet initiated ART (and thus did not qualify for ART under Kenyan guidelines), 60.2% of HIV-1 infected partners (69.4% of men and 57.9% of women) were willing to use early ART (at CD4 350 cells per microliter) for HIV-1 prevention. Among HIV-1 uninfected partners, 92.7% (93.8% of men and 86.1% of women) reported willingness to use PrEP. When given a hypothetical choice of early ART or PrEP for HIV-1 prevention, 52.5% of HIV-1-infected participants would prefer to initiate ART early and 56.9% of HIV-1-uninfected participants would prefer to use PrEP. Conclusions: Nearly 40% of Kenyan HIV-1-infected individuals in known HIV-1 serodiscordant partnerships reported reservations about early ART initiation for HIV-1 prevention. PrEP interest in this PrEP-experienced population was high. Strategies to achieve high uptake and sustained adherence to ART and PrEP for HIV-1 prevention in HIV-1 serodiscordant couples will require responding to couples' preferences for prevention strategies.

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Background: The impact of registered nurse (RN) staffing on patient care quality has been extensively studied. Identifying additional modifiable work environment factors linked to patient care quality is critical as the projected shortage of approximately 250,000 RNs over the next 15 years will limit institutions' ability to rely on RN staffing alone to ensure high-quality care. Purpose: Weexamined the association between RNs' ratings of patient care quality and several novelwork environment factors adjusting for the effects of two staffing variables: reported patient-to-RN ratios and ratings of staffing adequacy. Methodology: We used a cross-sectional, correlational design and a mailed survey to collect data in 2009 from a national sample of RNs (n = 1,439) in the United States. A multivariate logistic regression was used to analyze the data. Findings: Workgroup cohesion, nurseYphysician relations, procedural justice, organizational constraints, and physical work environment were associated with RNs' ratings of quality, adjusting for staffing. Furthermore, employment in a Magnet hospital and job satisfaction were positively related to ratings of quality, whereas supervisory support was not. Practice Implications: Our evidence demonstrates the importance of considering RN work environment factors other than staffing when planning improvements in patient care quality. Health caremanagers can use the results of our study to strategically allocate resources toward work environment factors that have the potential to improve quality of care.

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Purpose: To examine the psychometric properties of the 9-item Fatigue Severity Scale (FSS) using a Rasch model application. Methods: A convenience sample of HIV-infected adults was recruited, and a subset of the sample was assessed at 6-month intervals for 2 years. Socio-demographic, clinical, and symptom data were collected by self-report questionnaires. CD4 T-cell count and viral load measures were obtained from medical records. The Rasch analysis included 316 participants with 698 valid questionnaires. Results: FSS item 2 did not advanced monotonically, and items 1 and 2 did not show acceptable goodness-of-fit to the Rasch model. A reduced FSS 7-item version demonstrated acceptable goodness-of-fit and explained 61.2% of the total variance in the scale. In the FSS-7 item version, no uniform Differential Item Functioning was found in relation to time of evaluation or to any of the socio-demographic or clinical variables. Conclusion This study demonstrated that the FSS-7 has better psychometric properties than the FSS-9 in this HIV sample and that responses to the different items are comparable over time and unrelated to socio-demographic and clinical variables.