Publications

Abstract

Background: Self-care is vital for successful heart failure (HF) management. Mastering self-care is challenging; few patients develop sufficient expertise to avoid repeated hospitalization. OBJECTIVE:: To describe and understand how expertise in HF self-care develops. Methods: Extreme case sampling was used to identify 29 chronic HF patients predominately poor or particularly good in self-care. Using a mixed-methods (qualitative and quantitative) design, participants were interviewed about HF self-care, surveyed to measure factors anticipated to influence self-care, and tested for cognitive functioning. Audiotaped interviews were analyzed using content analysis. Qualitative and quantitative data were combined to produce a multidimensional typology of patients poor, good, or expert in HF self-care. Results: Only 10.3% of the sample was expert in HF self-care. Patients poor in HF self-care had worse cognition, more sleepiness, higher depression, and poorer family functioning. The primary factors distinguishing those good versus expert in self-care were sleepiness and family engagement. Experts had less daytime sleepiness and more support from engaged loved ones who fostered self-care skill development. CONCLUSION:: Engaged supporters can help persons with chronic HF to overcome seemingly insurmountable barriers to self-care. Research is needed to understand the effects of excessive daytime sleepiness on HF self-care.

Abstract

In the present report we describe patterns of traumatic events and Post-traumatic Stress Disorder (PTSD), both partial and full, among homeless youth and those at risk for homelessness, with an emphasis on gender differences. Participants were 85 homeless and at-risk youth (49% female) recruited from a drop-in center in New York City in 2000. Youth completed a structured interview lasting 1.5 h. Rates of childhood maltreatment were substantial. Further, almost all youth experienced at least one traumatic event, with most experiencing multiple types of trauma. Gender differences were found in the types, but not prevalence or magnitude, of childhood maltreatment and traumatic events experienced. Partial symptomatology of PTSD was common for females but not males. Symptoms of depression and anxiety were found to co-occur with PTSD for females, which may complicate treatment efforts. Further investigation of the impact of trauma on homeless males is needed.

Abstract

The purpose of this paper was to give voice to the concerns of registered nurses (RNs) who wrote comments on a survey about RNs' intent to work. Each comment (n = 472) was analyzed using thematic analysis. Four themes describe RNs' reflections on working: (a) competing priorities, (b) balancing priorities, (c) practice deterrents, and (d) collegial support encourages nurses to stay in practice. Understanding these reflections gives insight into the complexity of decisions to work and the RNs' struggle to practice. With this insight, RNs may consider decisions about their work throughout their job trajectories that may foster a more fulfilling nursing career.

Abstract

Early acquisition of hepatitis C virus (HCV) infection appears to affect a substantial proportion of injection drug users (IDUs)-between 20 percent and 90 percent. Analysing the range of HCV prevalence estimates in new injectors may help identify factors that can be modified to reduce HCV transmission. The HCV Synthesis Project is a meta-analysis of studies of HCV epidemiology and prevention in drug users worldwide. In this preliminary analysis, we examined data from 127 studies of IDUs that reported HCV prevalence in relation to age or year since onset of drug injection, analysing heterogeneity and calculating summary statistics where appropriate. Six studies reported gender-specific HCV prevalence rates among young or new injectors; the group mean prevalence was 47 percent for men and 44 percent for women (NS). Group mean age for HCV-negatives was 24.7 years (range 24-28) and 26.1 years (range 21-31) for HCV-positives (n = 8 studies). Data were examined from 13 studies that compared HCV prevalence among young injectors to older injectors using 5-year age categories; substantial variation was present within these categories such that measures of central tendency were not calculated. Similarly, among studies reporting HCV prevalence among IDUs in relation to 1-year intervals of duration of injection (<1 year, <2 years, and <3 years), considerable variability was observed. Notably, there were studies in each category that reported prevalence of 70 percent or higher among recent-onset drug injectors. Our findings confirm previous studies reporting high risk of acquiring HCV shortly after onset of injection; thus, HCV prevention programmes must emphasize methods to reach new injectors. Future research should (1) report data on time to infection in depth, (2) provide detailed information on study methodology, and (3) characterize the research setting with respect to underlying factors that affect injection practices and networks. This will permit synthesis of a greater number of studies and may lead to the identification of factors that impede HCV transmission.

Abstract

Background: A growing body of research links working conditions, such as staffing levels and work environment characteristics, with safety for both patients and workers in health care settings, including sharps injuries in hospital staff nurses. Methods: Surveys of 11,516 staff nurses from 188 Pennsylvania general acute care hospitals in 1999 were analyzed. Hospital work environments, measured using the Practice Environment Scales of the Nursing Work Index-Revised, and staffing were tested as predictors of experiencing at least one sharps injury in the preceding year, both before and after controlling for nurse risk factors, use of safety-engineered devices, and hospital structural characteristics. Results: Nurses with less than 5 years of experience, perioperative nurses, and those performing routine venipuncture for blood draws were more likely to be injured. Nurses working in hospitals with the most favorable working environments were one-third less likely to be injured. Staffing levels were not associated with sharps injuries. Conclusions: Across a large state, nurses working in acute care hospitals with better practice environments had fewer sharps injuries. Work environment conditions and specialty- and setting-specific risk factors deserve continued attention in sharps injury research.

Abstract

BACKGROUND: We investigated whether infants with homozygous genotype TT of the MTHFR gene were at increased risk of severe mental retardation. METHODS: One hundred children with severe mental retardation (cases) were investigated from a large geographic-based study of infants born in California in 1992-1993. Cases were compared to 743 randomly selected nonmalformed control infants born in California during 1987-1991. DNA was extracted from newborn screening filter papers. Cases and controls were genotyped TT if homozygous for the MTHFR C677T allele, CT if heterozygous for the C677T allele, and CC if homozygous for the C677 (wild type) allele. RESULTS: Overall, case and control infants had similar percentages of TT and CT genotypes. Percentages between cases and controls differed somewhat across race/ethnic groups. Elevated ORs of 1.9 (95% CI: 0.7-5.0) and 2.6 (95% CI: 1.1-5.8) were observed for the TT and CT genotypes, respectively, among Hispanic children. Observed results were not substantially altered for analyses that removed 41 case children who also had structural birth defects. CONCLUSIONS: Folate-related mechanisms are important to investigate for etiologies of birth defects, and such lines of inquiry may be revealing for mental retardation given the relationships between mental retardation and birth defects and potential relationships between folate, DNA methylation, and mental retardation.

Abstract

Purpose: To assess the key variables used in research on nurse staffing and patient outcomes from the perspective of an international panel. Design: A Delphi survey (November 2005-February 2006) of a purposively-selected expert panel from 10 countries consisting of 24 researchers specializing in nurse staffing and quality of health care and 8 nurse administrators. Methods: Each participant was sent by e-mail an up-to-date review of all evidence related to 39 patient-outcome, 14 nurse-staffing and 31 background variables and asked to rate the importance/usefulness of each variable for research on nurse staffing and patient outcomes. In two subsequent rounds the group median, mode, frequencies, and earlier responses were sent to each respondent. Findings: Twenty-nine participants responded to the first round (90.6%), of whom 28 (87.5%) responded to the second round. The Delphi panel generated 7 patient-outcome, 2 nurse-staffing and 12 background variables in the first round, not well-investigated in previous research, to be added to the list. At the end of the second round the predefined level of consensus (85%) was reached for 32 patient outcomes, 10 nurse staffing measures and 29 background variables. The highest consensus levels regarding measure sensitivity to nurse staffing were found for nurse perceived quality of care, patient satisfaction and pain, and the lowest for renal failure, cardiac failure, and central nervous system complications. Nursing Hours per Patient Day received the highest consensus score as a valid measure of the number of nursing staff. As a skill mix variable the proportion of RNs to total nursing staff achieved the highest consensus level. Both age and comorbidities were rated as important background variables by all the respondents. Conclusions: These results provide a snapshot of the state of the science on nurse-staffing and patient-outcomes research as of 2005. The results portray an area of nursing science in evolution and an understanding of the connections between human resource issues and healthcare quality based on both empirical findings and opinion.

Abstract

Objectives: In Peru, current interventions in high-risk men who have sex with men (MSM) reach a limited number of this population because they rely solely on peer education. The objective of this study was to assess the use of the internet as an alternative tool to access this population. Methods: Two nearly identical banner ads - both advertising an online survey but only one offering free HIV/syphilis tests and condoms - were displayed randomly on a Peruvian gay website. Results: The inclusion of the health incentive increased the frequency of completed surveys (5.8% vs 3.4% of delivered impressions; p<0.001), attracting high-risk MSM not previously tested for HIV but interested in a wide variety of preventive Web-based interventions. Eleven per cent (80/713) of participants who said they had completed the survey offering free testing visited our clinic: of those who attended, 6% had already been diagnosed as having HIV, while 5% tested positive for HIV. In addition, 8% tested positive for syphilis. Conclusions: The internet can be used as a tool to access MSM in Peru. The compensation of a free HIV/syphilis test increased the frequency of participation in our online survey, indicating that such incentives may be an effective means of reaching this population. However, as only a small percentage of participants actually reported for testing, future research should develop and assess tailored internet interventions to increase HIV/STI testing and delivery of other prevention services to Peruvian MSM.

Abstract

Objectives: To examine symptom clusters in oncology patients; to determine if these symptom clusters might share a common biologic mechanism; and to describe potential biologic mechanisms that warrant investigation. Data Sources: Synthesis of the theoretical and research papers on symptom clusters. Conclusion: Definitive conclusions about whether there is a biologic basis for the clustering of symptoms cannot be determined at this time. The animal model of sickness behavior holds promise as a potential biologic mechanism for clustering symptoms. Implications for Nursing Practice: Until more definitive studies of symptom clusters are performed, clinicians need to monitor patients for the co-occurrence of multiple symptoms and develop appropriate management plans.

Abstract

"Making the business case for nursing" is common shorthand these days for efforts to untangle the inputs and outputs of nursing education and service and provide the data necessary for making responsible decisions about resource allocation. Given the challenges facing American health care, nurse leaders must shape the future of nursing services within their facilities, communicate with nonnurse health care leaders and policymakers about alternatives for securing sufficient nurses and other nursing personnel to meet patient needs, and propose and implement the best strategies and models for ensuring optimal nursing care. They must articulate the consequences of making and not making certain investments as clearly as possible to multiple stakeholders.

Abstract

The present study describes complex drug and sexual risk in a group of male sex workers (n = 79) who were recruited in the context of a larger study of young heroin users in Hanoi, Vietnam (n = 1270). Male sex workers were significantly more likely than male non-sex workers to be migrants (P < 0.001) and to have unstable housing (P < 0.001), to have lifetime exposure to marijuana (P < 0.001), 3,4 methylenedioxymethamphetamine (MDMA, ecstasy) (P < 0.01), amphetamines (P < 0.05), cocaine (P < 0.01) and morphine (P < 0.001). Male sex workers are more likely to currently use MDMA (P < 0.05), amphetamines (P < 0.001), morphine (P < 0.05) and to 'smoke' as their most frequent mode of heroin administration (P < 0.01). Male sex workers are more likely to have both male and female concurrent sex partners (P < 0.001), to have a history of sexual victimisation (P < 0.001), to have had more than three different sex partners in the past 30 days (P < 0.001), and to have had partners who injected drugs before sex (P < 0.001) or who used drugs during sex (P < 0.01). In their last sexual encounter with a client partner, approximately one-third (31.1%) reported having had receptive anal sex. In nearly three-quarters of these exchanges (71.4%), no condom was used. Similarly, in their last sexual encounter with a client partner, 42.2% reported having had insertive anal sex and in nearly half (47.4%) of these encounters no condom was used. Consistent with recent data from elsewhere in the region, there is an urgent need for additional research on male sex work in South-east Asia in order to properly situate behavioural interventions for male sex workers in this region.

Abstract

Understanding sexual behavior and assessing transmission risk among people living with HIV-1 is crucial for effective HIV-1 prevention. We describe sexual behavior among HIV-positive persons initiating highly active antiretroviral therapy (HAART) in Beira, Mozambique. We present a Bernoulli process model (tool available online) to estimate the number of sexual partners who would acquire HIV-1 as a consequence of sexual contact with study participants within the prior three months. Baseline data were collected on 350 HAART-naive individuals 18-70 years of age from October 2004 to February 2005. In the three months prior to initiating HAART, 45% (n = 157) of participants had sexual relationships with 191 partners. Unprotected sex occurred in 70% of partnerships, with evidence suggesting unprotected sex was less likely with partners believed to be HIV-negative. Only 26% of the participants disclosed their serostatus to partners with a negative or unknown serostatus. Women were less likely to report concurrent relationships than were men (21 versus 66%; OR 0.13; 95%CI: 0.06, 0.26). Given baseline behaviors, the model estimated 23.2 infections/1,000 HIV-positive persons per year. The model demonstrated HAART along with syphilis and herpes simplex virus type 2 (HSV-2) treatment combined could reduce HIV-1 transmission by 87%; increasing condom use could reduce HIV-1 transmission by 67%.

Abstract

Hypertriglyceridemia is a hallmark of many disorders, including metabolic syndrome, diabetes, atherosclerosis and obesity. A well-known cause is the deficiency of lipoprotein lipase (LPL), a key enzyme in plasma triglyceride hydrolysis. Mice carrying the combined lipase deficiency (cld) mutation show severe hypertriglyceridemia owing to a decrease in the activity of LPL and a related enzyme, hepatic lipase (HL), caused by impaired maturation of nascent LPL and hepatic lipase polypeptides in the endoplasmic reticulum (ER). Here we identify the gene containing the cld mutation as Tmem112 and rename it Lmf1 (Lipase maturation factor 1). Lmf1 encodes a transmembrane protein with an evolutionarily conserved domain of unknown function that localizes to the ER. A human subject homozygous for a deleterious mutation in LMF1 also shows combined lipase deficiency with concomitant hypertriglyceridemia and associated disorders. Thus, through its profound effect on lipase activity, LMF1 emerges as an important candidate gene in hypertriglyceridemia.

Abstract

New evidence has prompted changes in our national cardiopulmonary resuscitation guidelines for both neonates and adult patients. The purpose of this article is to provide an overview of the changes recommended by the American Heart Association, Academy of American Pediatrics, and the American College of Obstetrics and Gynecology. In addition, a strategy for implementing these guidelines into practice is suggested.

Abstract

OBJECTIVE: In an effort to better understand turnover rates in hospitals and the effect of new nurses on them, this study sought to describe the characteristics and attitudes toward work of newly licensed RNs, a population important to both the nursing profession and the health care system. METHODS: A survey was mailed to a random sample of new RNs in 35 states and the District of Columbia. A total of 3,266 returned surveys met the inclusion criteria, for a response rate of 56%. RNs who qualified had completed the licensing examination and obtained a first license between August 1, 2004, and July 31, 2005. Data pertaining to four areas were collected: respondent characteristics, work-setting characteristics, respondents' attitudes toward work, and job opportunities. Respondents who were not working were asked to specify why. RESULTS: Of the eligible newly licensed RNs, 58.1% had an associate's degree, 37.6% had a bachelor's degree, and 4.3% had a diploma or a master's or higher degree as their first professional degree. They were generally pleased with their work groups but felt they had only moderate support from supervisors. About 13% had changed principal jobs after one year, and 37% reported that they felt ready to change jobs. More than half of the respondents (51%) worked voluntary overtime, and almost 13% worked mandatory overtime. Also, 25% reported at least one on-the-job needlestick in a year; 39%, at least one strain or sprain; 21%, a cut or laceration; and 46%, a bruise or contusion; 62% reported experiencing verbal abuse. A quarter of them found it "difficult or impossibleg" to do their jobs at least once per week because of inadequate supplies. CONCLUSIONS: This study provides descriptive evidence that a majority of newly licensed RNs are reasonably satisfied and have no plans to change jobs, but the group is not homogeneous. The negative attitudes expressed in response to some survey questions suggest that newly licensed RNs may not remain in the acute care settings where they start out. Investing in better orientation and management may be the key to retaining them in hospitals. The authors will be following these RNs for two years and will develop predictive models of turnover rates.

Abstract

This systematic review examined the evidence on the prevalence of the Hepatitis C Virus (HCV) in non-injecting drug users (NIDUs) who sniff, smoke or snort drugs such as heroin, cocaine, crack or methamphetamine. The search included studies published from January 1989 to January 2006. Twenty-eight eligible studies were identified and the prevalence of HCV in these NIDU populations ranged from 2.3 to 35.3%. There was substantial variation in study focus and in the quality of the NIDU data presented in the studies. The results of our systematic review suggested that there are important gaps in the research of HCV in NIDUs. We identified a problem of study focus; much of the research did not aim to study HCV in users of non-injection drugs. Instead, NIDUs were typically included as a secondary research concern, with a principal focus on the problem of transmission of HCV in IDU populations. Despite methodological issues, HCV prevalence in this population is much higher than in a non-drug using population, even though some IDUs might have inadvertently been included in the NIDU samples. These studies point to a real problem of HCV in NIDU populations, but the causal pathway to infection remains unclear.

Abstract

Background: This paper describes injection risk in an out-of-treatment population of young heroin users in Hanoi, Vietnam, including use of a soft-tissue portal known as a "cay ma" (injection sac). Methods: Data from a large cross-sectional survey (N=1270) are used to describe the prevalence of this practice and its association with disease. Additionally, data from an ethnographic substudy on injectors serve to elaborate injectors' rationales for this injection practice. Results: This practice was common in this sample, appearing soon after initiation of habitual injection. Injectors report that this allows rapid and reliable access to a vein; strategic advantages in a dense urban environment where rapid injection, typically in public settings, is necessary to avoid discovery or arrest. Additionally, this practice is believed to mitigate risk for vein damage from co-morbid promethazine hydrochloride injection. Conclusions: This practice may draw lymphocytes to injection sites, thereby increasing risk for transmission of bloodborne pathogens. Structural and behavioral interventions are needed for young heroin users in Vietnam.

Abstract

Background: The research literature linking nurse staffing and outcomes has expanded radically at a time of profound changes in human resources and financial management in hospitals and health care systems. Findings: Reviews of more than 100 peer-reviewed studies as of mid-2007 support an association between lower nurse staffing levels and poorer patient outcomes in acute care settings. Research efforts are increasingly aimed at understanding which outcomes are affected and under what circumstances and at evaluating the impact of staffing from an economic point of view. Minimal staffing levels appear to be a necessary but insufficient condition for safety in acute care hospitals. Conclusions and Implications: In the face of a deepening nursing shortage, many facilities are likely to find that various aspects of staffing, such as coverage, licensure levels, and experience, are lower than those historically in place. Advance planning by staff and supervisors and careful monitoring of outcomes are needed to ensure patient safety. Health care managers and executives need to benchmark staffing levels and nursing-sensitive outcomes in their facilities, carefully analyze recruitment and retention issues, and develop short- and long-term strategies for averting and dealing with the shortfalls in numbers and skill mix of nursing personnel that they will likely face increasingly in the coming decades.

Abstract

Background: Inadequate communication about pain can result in increased pain for patients. Objectives: The purpose of the current pilot study was to test how nurses respond when patients use their own words, a pain intensity scale, or both to communicate pain. Design: A post-test only experimental design was used with three pain description conditions, personal and numeric; personal only; numeric only. Setting: The setting included six hospitals and one school of nursing located in the northeastern United States. Participants: Participants included 122 registered medical surgical nurses. Methods: Nurses were randomly assigned to condition, and read a vignette about a trauma patient with moderately severe pain. The vignettes were identical except for the patient's pain description and age. The nurses then wrote how they would respond to the patient's pain. Two blind raters content analyzed the responses, giving nurses one point for including each of six a priori criteria derived from the Acute Pain Management Panel [1992. Acute Pain Management: operative or medical procedures and trauma. Clinical practice guideline (AHCPR Publication No. 92-0032)., Rockville, MD, USA] and the American Pain Society [2003. Principles of analgesic use in the treatment of acute pain and cancer pain, Glenville, IL, USA]. Results: Nurses planned similar numbers of pain management strategies across the three conditions, with a mean of 2.1 (SD=1.14) strategies out of the recommended six. Conclusions: Nurses did not respond with more pain management strategies when patients describe pain in their own words, or in their own words and a pain intensity scale. The relatively small number of pain management strategies planned by the nurses suggests that nurses use few strategies to respond to moderately severe pain problems.