Supporting Implementation Through Online Learning Communities: Lessons Learned From a National Training and Technical Assistance Network.

Recent implementation science frameworks highlight the role of training and technical assistance (TTA) in building workforce capacity to implement evidence-based practices (EBPs). However, evaluation of TTA is limited. We describe three case examples that highlight TTA by three regional centers in the national Mental Health Technology Transfer Center (MHTTC) network. Each MHTTC formed Learning Communities (LCs) to facilitate connections among behavioral health professionals with the goals of sharing implementation strategies, discussing best-practices, and developing problem solving techniques. Data on outcomes were collected through a combination of self-report surveys and qualitative interviews. LC participants reported strong connectedness, gains in knowledge and skills, improvements in implementation capacity, and intentions to advocate for organizational and systems-level change. Furthermore, across the case examples, we identified LC characteristics that are associated with participant perceptions of outcomes, including tailoring LC content to workforce needs, providing culturally relevant information, engaging leaders, forming connections among participants and trainers, and challenging participants' current workplace practices. These findings are interpreted through the lens of the Interactive Systems Framework, which focuses on how TTA, such as LCs, can facilitate connections between the theoretical and empirical foundations of interventions and the practices of implementing interventions in real-world settings to advance workforce capacity.

A birefringent spectral demultiplexer enables fast hyper-spectral imaging of protoporphyrin IX during neurosurgery.

Hyperspectral imaging and spectral analysis quantifies fluorophore concentration during fluorescence-guided surgery1-6. However, acquisition of the multiple wavelengths required to implement these methods can be time-consuming and hinder surgical workflow. To this end, a snapshot hyperspectral imaging system capable of acquiring 64 channels of spectral data simultaneously was developed for rapid hyperspectral imaging during neurosurgery. The system uses a birefringent spectral demultiplexer to split incoming light and redirect wavelengths to different sections of a large format microscope sensor. Its configuration achieves high optical throughput, accepts unpolarized input light and exceeds channel count of prior image-replicating imaging spectrometers by 4-fold. Tissue-simulating phantoms consisting of serial dilutions of the fluorescent agent characterize system linearity and sensitivity, and comparisons to performance of a liquid crystal tunable filter based hyperspectral imaging device are favorable. The new instrument showed comparable, if not improved, sensitivity at low fluorophore concentrations; yet, acquired wide-field images at more than 70-fold increase in frame rate. Image data acquired in the operating room during human brain tumor resection confirm these findings. The new device is an important advance in achieving real-time quantitative imaging of fluorophore concentration for guiding surgery.

Effects of Online Distance Learning on Violence Risk Knowledge and Competencies.

Behavioral health professionals are charged with providing effective outpatient services while addressing patient and public safety, yet training in empirically-informed violence risk assessment strategies remains inaccessible. The authors developed and evaluated an online distance learning (ODL) course on clinical risk assessment targeting frontline providers and trainees in the United States. The ODL consisted of three modules: confidentiality, duty to third parties, and clinical assessment of violence risk. We evaluated the response characteristics and reach among different disciplines, as well as training satisfaction, change in knowledge, self-perceived competence, and self-reported impact on practice at six-week follow-up among 221 learners. Self-perceptions of competence and knowledge in the focal areas increased immediately after completing the training; self-perceived competence increased again by a significant margin at six-week follow-up. Participants reported a moderate-high positive impact of the training on practice.

Differences in the Propensity of Different Antimicrobial Resistance Determinants to Be Disseminated via Transformation in Campylobacter jejuni and Campylobacter coli.

Campylobacter jejuni and Campylobacter coli are leading zoonotic foodborne pathogens, and the drugs of choice for human campylobacteriosis are macrolides (e.g., erythromycin) and fluoroquinolones. C. jejuni and C. coli are naturally competent for transformation via naked DNA uptake, but potential differences in transformation frequency (TF) for different antimicrobial resistance (AMR) markers remain poorly understood. We determined TFs for resistance to different antibiotics using as recipient a derivative of C. jejuni NCTC 11168 (strain SN:CM) with donor DNA from multidrug-resistant C. jejuni or C. coli. TF for nalidixic acid resistance ranked significantly highest (~1.4 × 10-3), followed by resistance to streptomycin and gentamicin. Tetracycline resistance via chromosomal tet(O) was less commonly transferred (~7.6 × 10-7), while transformation to erythromycin resistance was rare (≤4.7 × 10-8). We also determined TFs with the contemporary poultry-derived strains C. jejuni FSIS 11810577 and C. coli FSIS 1710488 as recipients. TFs to nalidixic acid and streptomycin resistance remained the highest (~7 × 10-4). However, TF for gentamicin resistance was remarkably low in certain recipient-donor combinations, while average TF for erythromycin resistance was noticeably higher (~3 × 10-6) than with SN:CM. Findings from this experimental model provide insights into factors that may impact transformation-mediated transfer of AMR leading to AMR dissemination in the agricultural ecosystem.

Evaluation of a systems-level technical assistance program to support youth with complex behavioral health needs.

The National Technical Assistance Network for Children's Behavioral Health (TA Network) supports the development and implementation of Systems of Care (SOC) for youth with serious emotional disorders and their families in states, tribes, territories, and communities throughout the United States. The purpose of the current research was to conduct an evaluation of the TA Network to assess: The degree to which it has deployed research-based elements of TA; levels of participant satisfaction; types and scope of TA services provided; and systems-level outcomes. Study participants were drawn from a stratified random sample of SOC grant recipients who received technical support from the TA Network between 2013 and 2017. Results suggest that the TA Network has encompassed research-based elements of effective TA. Participants rated their interactions with the network very highly, and they accessed a wide variety of resources from the network. Finally, participants reported a variety of systems-level outcomes associated with TA Network support. Together, these findings underscore the importance of structuring TA systems to tailor support to fit with recipients' needs, build positive, proactive relationships, and offer services of sufficient dosage. Given the lack of rigorous evaluations on provision of TA, future studies can confirm the degree to which such tailored approaches to TA result in increased satisfaction, more effective implementation of SOC principles, and ultimately improved outcomes for youth and families.

Applying implementation science in mental health services: Technical assistance cases from the Mental Health Technology Transfer Center (MHTTC) network.

OBJECTIVE: Critical gaps exist between implementation of effective interventions and the actual services delivered to people living with mental disorders. Many technical assistance (TA) efforts rely on one-time trainings of clinical staff and printed guidelines that alone are not effective in changing clinical practice. The Mental Health Technology Transfer Center (MHTTC) Network uses implementation science to accelerate the use of evidence-based practices (EBPs), improve performance, and bring about systems-level change. METHOD: Four case examples illustrate how MHTTCs employ the Exploration-Preparation-Implementation-Sustainment (EPIS) implementation framework and intensive implementation strategies to educate clinicians, manage change, and improve processes. These examples include implementing motivational interviewing, cognitive-behavioral therapy for people with psychosis, strategies to decrease the no show rate for virtual appointments, and school mental health systems development. RESULTS: From Preparation through Sustainment, MHTTCs successfully employed implementation strategies including learning communities, audit and feedback, and coaching to bring about change. Each project attended to inner and outer contexts to eliminate barriers. The examples also show the benefit of integrating process improvement alongside implementation. CONCLUSIONS: The MHTTCs are a model for using implementation science to design technical assistance that leads to more successful practical execution of EBPs; thus reducing the gap between research and practice.

A level-wise spine registration framework to account for large pose changes.

PURPOSES: Accurate and efficient spine registration is crucial to success of spine image guidance. However, changes in spine pose cause intervertebral motion that can lead to significant registration errors. In this study, we develop a geometrical rectification technique via nonlinear principal component analysis (NLPCA) to achieve level-wise vertebral registration that is robust to large changes in spine pose. METHODS: We used explanted porcine spines and live pigs to develop and test our technique. Each sample was scanned with preoperative CT (pCT) in an initial pose and rescanned with intraoperative stereovision (iSV) in a different surgical posture. Patient registration rectified arbitrary spinal postures in pCT and iSV into a common, neutral pose through a parameterized moving-frame approach. Topologically encoded depth projection 2D images were then generated to establish invertible point-to-pixel correspondences. Level-wise point correspondences between pCT and iSV vertebral surfaces were generated via 2D image registration. Finally, closed-form vertebral level-wise rigid registration was obtained by directly mapping 3D surface point pairs. Implanted mini-screws were used as fiducial markers to measure registration accuracy. RESULTS: In seven explanted porcine spines and two live animal surgeries (maximum in-spine pose change of 87.5 mm and 32.7 degrees averaged from all spines), average target registration errors (TRE) of 1.70 ± 0.15 mm and 1.85 ± 0.16 mm were achieved, respectively. The automated spine rectification took 3-5 min, followed by an additional 30 secs for depth image projection and level-wise registration. CONCLUSIONS: Accuracy and efficiency of the proposed level-wise spine registration support its application in human open spine surgeries. The registration framework, itself, may also be applicable to other intraoperative imaging modalities such as ultrasound and MRI, which may expand utility of the approach in spine registration in general.

Systematic Review and Meta-analysis: Effectiveness of Wraparound Care Coordination for Children and Adolescents.

OBJECTIVE: Wraparound is a common method for coordinating care for children and adolescents with serious emotional disorders (SED), with nearly 100,000 youths served annually in the United States. The current systematic review and meta-analysis estimated effects on youth outcomes (symptoms, functioning, school, juvenile justice, and residential placement) and costs. METHOD: A literature search identified 17 peer-reviewed and gray literature studies meeting criteria, which were coded on characteristics of sample, design, implementation, and outcomes. Random effects modeling was conducted using Comprehensive Meta-Analysis Version 3.0. Effect sizes were calculated using Hedges g. Homogeneity of effects were assessed using Q statistics. RESULTS: Medium-sized effects favored Wraparound-enrolled youths for costs (g = 0.391, CI = 0.282-0.500, p < .001), residential outcomes (g = 0.413, CI = 0.176-0.650, p = .001), and school functioning (g = 0.397, CI = 0.106-0.688, p = .007); small effects were found for mental health symptoms (g = 0.358, CI = 0.030-0.687, p = .033) and functioning (g = 0.315, CI = 0.086-0.545, p = .007). Larger effects were found for peer-reviewed studies, quasi-experimental designs, samples with a larger percentage of youths of color, and Wraparound conditions with higher fidelity. CONCLUSION: Results indicate positive effects for Wraparound, especially for maintaining youths with SED in the home and community. However, many studies showed methodological weaknesses, and fidelity measurement was largely absent, suggesting a need for additional research. Nonetheless, the results should aid decisions around resource allocation, referral practices, and system partnerships among child psychiatrists and other behavioral health professionals.

Improving the Usability of 5-Aminolevulinic Acid Fluorescence-Guided Surgery by Adding an Optimized Secondary Light Source.

BACKGROUND: Tumors that take up and metabolize 5-aminolevulinic acid emit bright pink fluorescence when illuminated with blue light, aiding surgeons in identifying the margin of resection. The adoption of this method is hindered by the blue light illumination, which is too dim to safely operate under and therefore necessitates switching back and forth from white-light mode. The aim of this study was to examine the addition of an optimized secondary illuminant adapter to improve usability of blue-light mode without degrading tumor contrast. METHODS: Color science methods were used to evaluate the color of the secondary illuminant and its impact on color rendering index as well as the tumor-to-background color contrast in data collected from 7 patients with high-grade gliomas (World Health Organization grade III and IV). A secondary illuminant adapter was built to provide 475-600 nm light the intensity of which can be controlled by the surgeon and was evaluated in 2 additional patients. RESULTS: Secondary illuminant color had opposing effects on color rendering index and tumor-to-background color contrast; providing surgeon control of intensity allows this trade-off to be balanced in real time. Demonstration in 2 high-grade glioma cases confirms this, showing that additional visibility adds value when intensity can be controlled by the surgeon. CONCLUSIONS: Addition of a secondary illuminant may mitigate surgeon complaints that the operative field is too dark under the blue light illumination required for 5-aminolevulinic acid fluorescence guidance by providing improved color rendering index without completely sacrificing tumor-to-background color contrast.

What Happens When Training Goes Virtual? Adapting Training and Technical Assistance for the School Mental Health Workforce in Response to COVID-19.

The Northwest Mental Health Technology Transfer Center (MHTTC) provides workforce training and technical assistance (TA) to support evidence-based school mental health practices. Historically, this support targeted school professionals through in-person and online trainings, workshops, and coaching. However, in response to COVID-19 restrictions, all support moved to online formats, and the Center introduced trainings for families and caregivers. The purpose of this article is to present preliminary process and outcome data that compare the reach and impact of support before and following COVID-19-related restrictions. Results suggest that transition to online support resulted in a wider reach and a more diverse audience, with no decrease in trainee satisfaction and perceived impact. Furthermore, families and caregivers reported positive gains in knowledge and behaviors following participation in a virtual youth suicide prevention training. Together, these findings suggest that online training and TA can provide tangible benefits to professionals and family members who support student mental health.

Developing an Evidence-Based Technical Assistance Model: a Process Evaluation of the National Training and Technical Assistance Center for Child, Youth, and Family Mental Health.

The National Training and Technical Assistance Center for Child, Youth, and Family Mental Health (NTTAC) supports the development and implementation of systems of care (SOC) for youth with serious emotional disorders (SED) and their families. This article presents results from a process evaluation of NTTAC, conducted to support the Center's quality improvement and contribute to the knowledge base around provision of technical assistance (TA). The evaluation used a mixed methods approach with data collection focused on a defined subset of NTTAC TA recipients-recipients of federal Comprehensive Community Mental Health Services for Children SOC grants. Data sources included coded administrative records from SOC grant sites, administrative data from NTTAC, standardized measures of SOC development, and stakeholder survey data. Results indicate that TA dosage matched needs and goals of TA recipients (SOC sites), overall levels of satisfaction with TA were high, and TA content was generally aligned with need. TA recipients reported significant progress on indicators of SOC development over time. Together, these findings suggest that it is possible to develop TA methods that reflect the level and type of TA recipients' goals and needs, and, in turn, positively impact SOC development and behavioral health service delivery.

Feasibility and acceptance of a cloud-based mobile app for antimicrobial stewardship and infection control in Colombian hospitals.

Infection control and antimicrobial stewardship programs (ICASPs) are essential to reduce the emergence and spread of antimicrobial resistance. The primary objective of this study was to assess the feasibility of extending a commercial off-the-shelf (COTS) software for ICASPs in low- and middle-income countries (LMICs). This project involved three hospitals in Colombia, including Centro Médico Imbanaco, Clínica San Francisco, and DIME Clínica Neurocardiovascular. A COTS platform (ILÚM Health Solutions™ Kenilworth, NJ) was extended to function in a range of technology settings, and translatable to almost any language. ICASP features were added, including clinical practice guidelines, hand hygiene (HH) documentation, and isolation precaution (IP) documentation. The platform was delivered as a smartphone mobile application ("app") for both iOS and Android. The app was successfully implemented at all sites, however, full back-end data integration was not feasible at any site. In contrast to the United States, a suite of surveillance tools and physician-focused decision support without patient data proved to be valuable. Language translation processing occurred quickly and incurred minimal costs. HH and IP compliance tracking were the most used features among ICASP staff; treatment guidelines were most often used by physicians. Use of the app streamlined activities and reduced the time spent on ICASP tasks. Users consistently reported positive impressions including simplicity of design, ease of navigation, and improved efficiency. This ICASP app was feasible in limited-resource settings, highly acceptable to users, and represents an innovative approach to antimicrobial resistance prevention.

Quantum Chemistry in the Age of Quantum Computing.

Practical challenges in simulating quantum systems on classical computers have been widely recognized in the quantum physics and quantum chemistry communities over the past century. Although many approximation methods have been introduced, the complexity of quantum mechanics remains hard to appease. The advent of quantum computation brings new pathways to navigate this challenging and complex landscape. By manipulating quantum states of matter and taking advantage of their unique features such as superposition and entanglement, quantum computers promise to efficiently deliver accurate results for many important problems in quantum chemistry, such as the electronic structure of molecules. In the past two decades, significant advances have been made in developing algorithms and physical hardware for quantum computing, heralding a revolution in simulation of quantum systems. This Review provides an overview of the algorithms and results that are relevant for quantum chemistry. The intended audience is both quantum chemists who seek to learn more about quantum computing and quantum computing researchers who would like to explore applications in quantum chemistry.

Similarities and differences in program registers: A case study.

Researchers, clinicians, and other professionals are increasingly in need of cost-effective, evidence-based programs and practices. However, these individuals may lack the time and, for some, the required expertise to search for and identify such interventions. To address this concern, several online registers that list or categorize programs according to their empirical evidence of effectiveness have been established. Although these registers are designed to simplify the task of selecting evidence-based interventions, the use of distinct review processes and standards by each register creates discrepancies in final program classifications, which can pose a challenge for users. The present case study highlights three programs that have been evaluated by more than one register and have received similar or different classifications. Reasons for inconsistencies are discussed, and several recommendations for evaluating organizations and register users are provided to enhance the functionality and ease of use of online program registers.

The value of visible 5-ALA fluorescence and quantitative protoporphyrin IX analysis for improved surgery of suspected low-grade gliomas.

OBJECTIVE: In patients with suspected diffusely infiltrating low-grade gliomas (LGG), the prognosis is dependent especially on extent of resection and precision of tissue sampling. Unfortunately, visible 5-aminolevulinic acid (5-ALA) fluorescence is usually only present in high-grade gliomas (HGGs), and most LGGs cannot be visualized. Recently, spectroscopic probes were introduced allowing in vivo quantitative analysis of intratumoral 5-ALA-induced protoporphyrin IX (PpIX) accumulation. The aim of this study was to intraoperatively investigate the value of visible 5-ALA fluorescence and quantitative PpIX analysis in suspected diffusely infiltrating LGG. METHODS: Patients with radiologically suspected diffusely infiltrating LGG were prospectively recruited, and 5-ALA was preoperatively administered. During resection, visual fluorescence and absolute tissue PpIX concentration (CPpIX) measured by a spectroscopic handheld probe were determined in different intratumoral areas. Subsequently, corresponding tissue samples were safely collected for histopathological analysis. Tumor diagnosis was established according to the World Health Organization 2016 criteria. Additionally, the tumor grade and percentage of tumor cells were investigated in each sample. RESULTS: All together, 69 samples were collected from 22 patients with histopathologically confirmed diffusely infiltrating glioma. Visible fluorescence was detected in focal areas in most HGGs (79%), but in none of the 8 LGGs. The mean CPpIX was significantly higher in fluorescing samples than in nonfluorescing samples (0.693 µg/ml and 0.008 µg/ml, respectively; p < 0.001). A significantly higher mean percentage of tumor cells was found in samples with visible fluorescence compared to samples with no fluorescence (62% and 34%, respectively; p = 0.005), and significant correlation of CPpIX and percentage of tumor cells was found (r = 0.362, p = 0.002). Moreover, high-grade histology was significantly more common in fluorescing samples than in nonfluorescing samples (p = 0.001), whereas no statistically significant difference in mean CPpIX was noted between HGG and LGG samples. Correlation between maximum CPpIX and overall tumor grade was highly significant (p = 0.005). Finally, 14 (40%) of 35 tumor samples with no visible fluorescence and 16 (50%) of 32 LGG samples showed significantly increased CPpIX (cutoff value: 0.005 µg/ml). CONCLUSIONS: Visible 5-ALA fluorescence is able to detect focal intratumoral areas of malignant transformation, and additional quantitative PpIX analysis is especially useful to visualize mainly LGG tissue that usually remains undetected by conventional fluorescence. Thus, both techniques will support the neurosurgeon in achieving maximal safe resection and increased precision of tissue sampling during surgery for suspected LGG.Clinical trial registration no.: NCT01116661 (clinicaltrials.gov).

Quantification of Subdural Electrode Shift Between Initial Implantation, Postimplantation Computed Tomography, and Subsequent Resection Surgery.

BACKGROUND: Subdural electrodes are often implanted for localization of epileptic regions. Postoperative computed tomography (CT) is typically acquired to locate electrode positions for planning any subsequent surgical resection. Electrodes are assumed to remain stationary between CT acquisition and resection surgery. OBJECTIVE: To quantify subdural electrode shift that occurred between the times of implantation (Crani 1), postoperative CT acquisition, and resection surgery (Crani 2). METHODS: Twenty-three patients in this case series undergoing subdural electrode implantation were evaluated. Preoperative magnetic resonance and postoperative CT were acquired and coregistered, and electrode positions were extracted from CT. Intraoperative positions of electrodes and the cortical surface were digitized with a coregistered stereovision system. Movement of the exposed cortical surface was also tracked, and change in electrode positions was calculated relative to both the skull and the cortical surface. RESULTS: In the 23 cases, average shift of electrode positions was 8.0 ± 3.3 mm between Crani 1 and CT, 9.2 ± 3.7 mm between CT and Crani 2, and 6.2 ± 3.0 mm between Crani 1 and Crani 2. The average cortical shift was 4.7 ± 1.4 mm with 2.9 ± 1.0 mm in the lateral direction. The average shift of electrode positions relative to the cortical surface between Crani 1 and Crani 2 was 5.5 ± 3.7 mm. CONCLUSION: The results show that electrodes shifted laterally not only relative to the skull, but also relative to the cortical surface, thereby displacing the electrodes from their initial placement on the cortex. This has significant clinical implications for resection based upon seizure activity and functional mapping derived from intracranial electrodes.

5-Aminolevulinic Acid-Induced Fluorescence in Focal Cortical Dysplasia: Report of 3 Cases.

BACKGROUND: Three patients enrolled in a clinical trial of 5-aminolevulinic-acid (5-ALA)-induced fluorescence-guidance, which has been demonstrated to facilitate intracranial tumor resection, were found on neuropathological examination to have focal cortical dysplasia (FCD). OBJECTIVE: To evaluate in this case series visible fluorescence and quantitative levels of protoporphyrin IX (PpIX) during surgery and correlate these findings with preoperative magnetic resonance imaging (MRI) and histopathology. METHODS: Patients were administered 5-ALA (20 mg/kg) approximately 3 h prior to surgery and underwent image-guided, microsurgical resection of their MRI- and electrophysiologically identified lesions. Intraoperative visible fluorescence was evaluated using an operating microscope adapted with a commercially available blue light module. Quantitative PpIX levels were assessed using a handheld fiber-optic probe and a wide-field imaging spectrometer. Sites of fluorescence measurements were co-registered with both preoperative MRI and histopathological analysis. RESULTS: Three patients with a pathologically confirmed diagnosis of FCD (Types 1b, 2a, and 2b) underwent surgery. All patients demonstrated some degree of visible fluorescence (faint or moderate), and all patients had quantitatively elevated concentrations of PpIX. No evidence of neoplasia was identified on histopathology, and in 1 patient, the highest concentrations of PpIX were found at a tissue site with marked gliosis but no typical histological features of FCD. CONCLUSION: FCD has been found to be associated with intraoperative 5-ALA-induced visible fluorescence and quantitatively confirmed elevated concentrations of the fluorophore PpIX in 3 patients. This finding suggests that there may be a role for fluorescence-guidance during surgical intervention for epilepsy-associated FCD.

Feasibility of using spatial frequency-domain imaging intraoperatively during tumor resection.

Mapping the optical absorption and scattering properties of tissues using spatial frequency-domain imaging (SFDI) enhances quantitative fluorescence imaging of protoporphyrin IX (PpIX) in gliomas in the preclinical setting. The feasibility of using SFDI in the operating room was investigated here. A benchtop SFDI system was modified to mount directly to a commercial operating microscope. A digital light processing module imposed a selectable spatial light pattern from a broad-band xenon arc lamp to illuminate the surgical field. White light excitation and a liquid crystal-tunable filter allowed the diffuse reflectance images to be recorded at discrete wavelengths from 450 to 720 nm on a sCMOS camera. The performance was first tested in tissue-simulating phantoms, and data were then acquired intraoperatively during brain tumor resection surgery. The optical absorption and transport scattering coefficients could be estimated with average errors of 3.2% and 4.5% for the benchtop and clinical systems, respectively, with spatial resolution of better than 0.7 mm. These findings suggest that SFDI can be implemented in a clinically relevant configuration to achieve accurate mapping of the optical properties in the surgical field that can then be applied to achieve quantitative imaging of the fluorophore.

The Women's Experience: A Look at Risk and Protective Factors for Deployed Female Air Force Personnel.

Objective: Over the past few decades, women's roles in the United States military have expanded significantly. Currently women encounter more wartime experiences during deployment than in the past. Previous research with male service members has linked exposure to wartime events to subsequent development of post-traumatic stress disorder (PTSD) symptoms. However, because of the unique experiences of military women, research is needed to better understand the link between wartime experiences and mental health in female personnel. Methods: We examined the wartime experiences of deployed, active-duty female Airmen and their relations to PTSD. A large representative sample of active-duty female Air Force personnel, who responded to the U.S. Air Force Community Assessment Survey (CAS), was used to determine the relationships between wartime experiences and symptoms of PTSD. Previous research suggests the possibility that factors, including unit cohesion and self-efficacy, may mediate these relations. Results: Descriptive analyses indicate that the percentage of personnel experiencing PTSD symptoms increased as the number of wartime experiences increased. Logistic regression analyses revealed that wartime experiences were positively related to subsequent PTSD-related symptoms. Both unit cohesion and self-efficacy were negatively related to PTSD symptoms, but neither variable was found to moderate the relationship between wartime experiences and PTSD. Conclusions: Women are experiencing greater numbers of wartime experiences. Like men, as the number of wartime experiences increases, PTSD symptoms increase as well. Self-efficacy and unit cohesion were found to lower these symptoms, indicating that these factors may help decrease the negative impact of wartime experiences.