Most neuropsychological tests were developed without the benefit of modern psychometric theory. We used item response theory (IRT) methods to determine whether a widely used test – the 26-item Matrix Reasoning subtest of the WAIS-IV – might be used more efficiently if it were administered using computerized adaptive testing (CAT).

Data on the Matrix Reasoning subtest from 2197 participants enrolled in the National Neuropsychology Network (NNN) were analyzed using a two-parameter logistic (2PL) IRT model. Simulated CAT results were generated to examine optimal short forms using fixed-length CATs of 3, 6, and 12 items and scores were compared to the original full subtest score. CAT models further explored how many items were needed to achieve a selected precision of measurement (standard error ≤ .40).

The fixed-length CATs of 3, 6, and 12 items correlated well with full-length test results (with r = .90, .97 and .99, respectively). To achieve a standard error of .40 (approximate reliability = .84) only 3–7 items had to be administered for a large percentage of individuals.

This proof-of-concept investigation suggests that the widely used Matrix Reasoning subtest of the WAIS-IV might be shortened by more than 70% in most examinees while maintaining acceptable measurement precision. If similar savings could be realized in other tests, the accessibility of neuropsychological assessment might be markedly enhanced, and more efficient time use could lead to broader subdomain assessment.

Rapid antigen detection tests (Ag-RDT) for SARS-CoV-2 with emergency use authorization generally include a condition of authorization to evaluate the test’s performance in asymptomatic individuals when used serially. We aim to describe a novel study design that was used to generate regulatory-quality data to evaluate the serial use of Ag-RDT in detecting SARS-CoV-2 virus among asymptomatic individuals.

This prospective cohort study used a siteless, digital approach to assess longitudinal performance of Ag-RDT. Individuals over 2 years old from across the USA with no reported COVID-19 symptoms in the 14 days prior to study enrollment were eligible to enroll in this study. Participants throughout the mainland USA were enrolled through a digital platform between October 18, 2021 and February 15, 2022. Participants were asked to test using Ag-RDT and molecular comparators every 48 hours for 15 days. Enrollment demographics, geographic distribution, and SARS-CoV-2 infection rates are reported.

A total of 7361 participants enrolled in the study, and 492 participants tested positive for SARS-CoV-2, including 154 who were asymptomatic and tested negative to start the study. This exceeded the initial enrollment goals of 60 positive participants. We enrolled participants from 44 US states, and geographic distribution of participants shifted in accordance with the changing COVID-19 prevalence nationwide.

The digital site-less approach employed in the “Test Us At Home” study enabled rapid, efficient, and rigorous evaluation of rapid diagnostics for COVID-19 and can be adapted across research disciplines to optimize study enrollment and accessibility.

Tumor profiling tests can help to identify whether women with breast cancer need chemotherapy due to their risk of relapse, and some may be able to predict benefit from chemotherapy. We focused on four genetic tests: Oncotype DX (O-DX), MammaPrint (MMP), EndoPredict and Prosigna, and one immunohistochemistry test, IHC4, for the National Institute of Health and Care Excellence as part of their Diagnostic Appraisal Programme.

A systematic review was undertaken, including searching of nine databases in February 2017 plus other sources including a previous review published in 2013. The review included studies assessing clinical effectiveness of the five tumor profiling tests, with or without clinicopathological factors, to guide decisions about adjuvant chemotherapy in people with ER-positive, HER-2 negative, Stage I-II cancer with 0 to 3 positive lymph nodes (LN). The PROBAST tool and Cochrane risk of bias tools were used to assess risk of bias.

A total of 153 studies were included; the strength of evidence base for individual tests was varied. Results suggest all tests are prognostic for risk of relapse, though results were more varied in LN positive (+) patients than in LN negative (0) patients. Evidence was limited about whether tests can predict benefit from chemotherapy (available for MMP and O-DX only). Studies that assessed the impact of the tests on clinical decisions indicate that the net change in chemotherapy recommendations or decisions pre-/post-test ranged from an increase of one percent to a decrease of 23 percent among UK studies, and a decrease of zero percent to 64 percent across European studies.

The studies included in the review suggest that all of the tests can provide prognostic information on the risk of relapse; however results were more varied in LN+ patients than in LN0 patients. There is limited and varying evidence for prediction of chemotherapy benefit.

Contaminated hands of healthcare workers (HCWs) are an important source of transmission of healthcare-associated infections. Alcohol-based hand sanitizers, while effective, do not provide sustained antimicrobial activity. The objective of this study was to compare the immediate and persistent activity of 2 hand hygiene products (ethanol [61% w/v] plus chlorhexidine gluconate [CHG; 1.0% solution] and ethanol only [70% v/v]) when used in an intensive care unit (ICU).

Prospective, randomized, double-blinded, crossover study

Three ICUs at a large teaching hospital

In total, 51 HCWs involved in direct patient care were enrolled in and completed the study.

All HCWs were randomized 1:1 to either product. Hand prints were obtained immediately after the product was applied and again after spending 4–7 minutes in the ICU common areas prior to entering a patient room or leaving the area. The numbers of aerobic colony-forming units (CFU) were compared for the 2 groups after log transformation. Each participant tested the alternative product after a 3-day washout period.

On bare hands, use of ethanol plus CHG was associated with significantly lower recovery of aerobic CFU, both immediately after use (0.27 ± 0.05 and 0.88 ± 0.08 log10 CFU; P = .035) and after spending time in ICU common areas (1.81 ± 0.07 and 2.17 ± 0.05 log10 CFU; P<.0001). Both the antiseptics were well tolerated by HCWs.

In comparison to the ethanol-only product, the ethanol plus CHG sanitizer was associated with significantly lower aerobic bacterial counts on hands of HCWs, both immediately after use and after spending time in ICU common areas.

Clinicaltrials.gov identifier NCT02258412

Infect Control Hosp Epidemiol 2018;39:267–271

Uveitis is inflammation inside the eye whose underlying cause may be infectious or non-infectious. The objective of our study was to assess the cost-effectiveness of the dexamethasone implant and adalimumab compared with current practice (immunosuppressants and systemic corticosteroids) in patients with non-infectious intermediate, posterior or pan-uveitis.

A Markov model was built to estimate costs and benefits of the interventions. Systematic reviews were performed to identify the relevant evidence. Quality of life data collected in three key randomized-controlled trials (1-3) was used to estimate the interventions effectiveness compared with the trials comparator arms, which consisted of placebo plus limited current practice (LCP). An indirect treatment comparison between adalimumab and dexamethasone was considered inappropriate due to lack of necessary evidence. For adalimumab, patients with active and inactive uveitis were considered separately. Due to the short duration of the trials, the rate of blindness, an important complication of uveitis, was highly uncertain. Substantial exploratory analyses were therefore undertaken. The analysis was performed from the perspective of the National Health Service (NHS) and Personal Social Services (PSS). Costs were calculated based on standard United Kingdom sources.

The estimated incremental cost-effectiveness (ICER) of dexamethasone compared with LCP was GBP19,509 per quality-adjusted life year (QALY) gained. The estimated ICER of adalimumab compared with LCP was GBP94,523 and GBP317,547 per QALY in patients with active and inactive uveitis respectively. The factors with the largest impact upon the ICERs were the rate of blindness and the proportion of cases of blindness avoided by interventions.

Dexamethasone and adalimumab resulted in health gains, but at significant extra costs, especially adalimumab which is unlikely to be considered a cost-effective use of NHS resources. The results of the analysis are highly uncertain due to the limited availability of evidence on: the comparative effectiveness of dexamethasone, adalimumab and current practice; the effectiveness of treatments in avoiding blindness; and, the effectiveness of interventions in different subgroups.

The 2014 Ebola virus disease (EVD) outbreak in West Africa remains the most deadly in history. Emergency departments (EDs) are more likely to come into contact with potential EVD patients. It is important for EDs to be prepared to care for suspected EVD patients. Our objective was to understand the perceived challenges experienced by Washington State ED medical directors in EVD preparedness.

An anonymous, electronic survey was sent to a convenience sample of ED medical directors across Washington State between November and February of 2014–2015. The perceived challenges of and attitudes toward EVD preparations were assessed and reported as stratified proportions.

Of 85 medical directors contacted, 59 responses (69%) were received. This included EDs with annual patient volumes of <20,000 (20 hospitals, 34%), 20,000 to 40,000 (21 hospitals, 36%), 41,000 to 60,000 (4 hospitals, 6.8%), and >60,000 (12 hospitals, 20%). Among the perceived challenges in EVD preparations were spatial modifications (eg, building an anteroom for donning and doffing of personal protective equipment) and waste management planning. Ninety-five percent of respondents moderately or strongly agreed that it is important to have a predesignated hospital to care for EVD patients.

Washington State ED medical directors have faced significant challenges in ensuring their EDs are prepared to safely care for suspected EVD patients. Attitudes toward EVD preparations are mixed. Varying levels of perceived importance may represent an additional barrier to statewide EVD preparedness. (Disaster Med Public Health Preparedness. 2016;10:662–668)

Education-based interventions can reduce the incidence of catheter-associated bloodstream infection. The generalizability of findings from single-center studies is limited.

To assess the effect of a multicenter intervention to prevent catheter-associated bloodstream infections.

An observational study with a planned intervention.

Twelve intensive care units and 1 bone marrow transplantation unit at 6 academic medical centers.

Patients admitted during the study period.

Updates of written policies, distribution of a 9-page self-study module with accompanying pretest and posttest, didactic lectures, and incorporation into practice of evidence-based guidelines regarding central venous catheter (CVC) insertion and care.

Standard data collection tools and definitions were used to measure the process of care (ie, the proportion of non-tunneled catheters inserted into the femoral vein and the condition of the CVC insertion site dressing for both tunneled and nontunneled catheters) and the incidence of catheter-associated bloodstream infection.

Between the preintervention period and the postintervention period, the percentage of CVCs inserted into the femoral vein decreased from 12.9% to 9.4% (relative ratio, 0.73; 95% confidence interval [CI], 0.61-0.88); the total proportion of catheter insertion site dressings properly dated increased from 26.6% to 34.4% (relative ratio, 1.29; 95% CI, 1.17-1.42), and the overall rate of catheter-associated bloodstream infections decreased from 11.2 to 8.9 infections per 1,000 catheter-days (relative rate, 0.79; 95% CI, 0.67-0.93). The effect of the intervention varied among individual units.

An education-based intervention that uses evidence-based practices can be successfully implemented in a diverse group of medical and surgical units and reduce catheter-associated bloodstream infection rates.