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1.
J Gen Intern Med ; 38(Suppl 3): 814-820, 2023 07.
Article in English | MEDLINE | ID: mdl-37340260

ABSTRACT

BACKGROUND: An adequate supply of mental health (MH) professionals is necessary to provide timely access to MH services. Veterans Health Administration (VHA) continues to prioritize the expansion of the MH workforce to meet increasing demand for services. OBJECTIVE: Validated staffing models are essential to ensure timely access to care, to plan for future demand, to ensure delivery of high-quality care, and to balance the demands of fiscal responsibility and strategic priorities. DESIGN: Longitudinal retrospective cohort of VHA outpatient psychiatry, fiscal years 2016-2021. PARTICIPANTS: Outpatient VHA psychiatrists. MAIN MEASURES: Quarterly outpatient staff-to-patient ratios (SPRs), defined as the number of full-time equivalent clinically assigned providers per 1000 veterans receiving outpatient MH care, were calculated. Longitudinal recursive partitioning models were created to identify optimal cut-offs for the outpatient psychiatry SPR associated with success on VHA's measures of quality, access, and satisfaction. KEY RESULTS: Among outpatient psychiatry staff, the root node identified an outpatient SPR of 1.09 for overall performance (p < 0.001). For metrics associated with Population Coverage, a root node identified an SPR of 1.36 (p < 0.001). Metrics associated with continuity of care and satisfaction were associated with a root node of 1.10 and 1.07 (p < 0.001), respectively. In all analyses, the lowest SPRs were associated with the lowest group performance on VHA MH metrics of interest. CONCLUSIONS: Establishing validated staffing models associated with high-quality MH care is critical given the national psychiatry shortage and increasing demand for services. Analyses support VHA's current recommended minimum outpatient psychiatry-specific SPR of 1.22 as a reasonable target to provide high-quality care, access, and satisfaction.


Subject(s)
Psychiatry , Veterans , United States/epidemiology , Humans , Outpatients , Veterans Health , United States Department of Veterans Affairs , Mental Health , Retrospective Studies , Workforce
2.
Psychol Serv ; 20(1): 137-143, 2023 Feb.
Article in English | MEDLINE | ID: mdl-34780211

ABSTRACT

Veterans Health Administration (VHA) continues to expand the mental health (MH) workforce to meet increasing demand for services. In the present study, longitudinal unbiased recursive partitioning models (conditional inference trees) were created to identify optimal cutoffs for outpatient staffing ratios associated with success on VHA's measures of quality, access, and satisfaction. Quarterly Staff-to-Patient Ratios (SPRs), defined as the number of full-time equivalent providers per 1,000 veterans receiving outpatient mental health care, were calculated for 12 quarters from fiscal years 2016-2018. Associations between VHA metrics associated with quality, access, and satisfaction were evaluated in relation to the overall outpatient SPR. The root node identified an overall outpatient SPR of 7.39 as the split for optimal MH performance. Root nodes associated with metrics addressing population coverage, continuity of care, and experience of care identified SPRs of 7.87, 6.81, and 7.42, respectively. In all analyses, the lowest SPRs were associated with the lowest performance on VHA MH metrics, while the highest SPRs were associated with the highest performance. Analyses support VHA's current recommended minimum outpatient SPR of 7.72 as a reasonable target to provide high-quality care, access, and satisfaction. (PsycInfo Database Record (c) 2023 APA, all rights reserved).


Subject(s)
Outpatients , Veterans , United States , Humans , United States Department of Veterans Affairs , Personal Satisfaction , Workforce
3.
Curr Med Res Opin ; 38(11): 1983-1995, 2022 11.
Article in English | MEDLINE | ID: mdl-36031882

ABSTRACT

BACKGROUND: The extent of short-acting ß2-agonist (SABA) overuse in Africa remains poorly documented. As part of the SABA use IN Asthma (SABINA) III study, we assessed SABA prescriptions/clinical outcomes in 3 African countries. METHODS: Data on disease characteristics/asthma treatments were collected from patients (≥12 years) using electronic case report forms. Patients were classified by investigator-defined asthma severity (guided by the 2017 Global Initiative for Asthma) and practice type (primary/specialist care). Multivariable regression models analyzed associations between SABA prescriptions and outcomes. RESULTS: Data from 1778 patients (mean age, 43.7 years) were analyzed. Most patients were female (62.4%) and had moderate-to-severe asthma (63.3%), with 57.1 and 42.9% of patients treated in specialist and primary care, respectively. Asthma was partly controlled/uncontrolled in 66.2% of patients, with 57.9% experiencing ≥1 severe exacerbation in the previous 12 months. Overall, 46.5% of patients were prescribed ≥3 SABA canisters in the preceding 12 months (over-prescription); 26.2% were prescribed ≥10 canisters. SABAs were purchased over-the-counter by 32.6% of patients, of whom 79.3% had received SABA prescriptions; 71.9% and 40.1% for ≥3 and ≥10 canisters, respectively. Higher SABA prescriptions (vs. 1-2 canisters) were associated with increased incidence rate of severe exacerbations and lower odds of having at least partly controlled asthma (except 3-5 canisters). CONCLUSIONS: Findings from this African cohort of the SABINA III study indicate that SABA over-prescription and SABA over-the-counter purchase are common and associated with poor asthma-related outcomes. This highlights the need for healthcare providers/policymakers to align clinical practices with the latest treatment recommendations.


Subject(s)
Asthma , Adult , Female , Humans , Male , Asthma/drug therapy , Asthma/epidemiology , Cohort Studies , Nonprescription Drugs/therapeutic use , Prescriptions
4.
PLoS One ; 16(8): e0256268, 2021.
Article in English | MEDLINE | ID: mdl-34398908

ABSTRACT

BACKGROUND: Healthcare systems monitor and improve mental health treatment quality, access, continuity and satisfaction through use of population-based and efficiency-based staffing models, the former focused on staffing ratios and the latter, staff productivity. Preliminary evidence suggests that both high staffing ratios and moderate-to-high staff productivity are important for ensuring a full continuum of mental health services to indicated populations. METHODS & FINDINGS: With an information-theoretic approach, we conducted a longitudinal investigation of mental health staffing, productivity and treatment at the largest integrated healthcare system in American, the Veterans Health Administration (VHA). VHA facilities (N = 140) served as the unit of measure, with mental health treatment quality, access, continuity and satisfaction predicted by facility staffing and productivity in longitudinal mixed models. An information-theoretic approach: (a) entails the development of a comprehensive set of plausible models that are fit, ranked and weighted to quantitatively assess the relative support for each, and (b) accounts for model uncertainty while identifying best-fit model(s) that include important and exclude unimportant explanatory variables. In best-fit models, higher staffing was the strongest and most consistent predictor of better treatment quality, access, continuity and satisfaction. Higher staff productivity was often, but not always associated with better treatment quality, access, continuity and satisfaction. Results were further nuanced by differential prediction of treatment by between- and within-facility predictor effects and variable interactions. CONCLUSIONS: A population-based mental health staffing ratio and an efficiency-based productivity value are important longitudinal predictors of mental health treatment quality, access, continuity and satisfaction. Our longitudinal design and use of mixed regression models and an information-theoretic approach addresses multiple limitations of prior studies and strengthen our results. Results are discussed in terms of the provision of mental health treatment by healthcare systems, and analytical modeling of treatment quality, access, continuity and satisfaction.


Subject(s)
Health Personnel/organization & administration , Mental Health Services/organization & administration , Mental Health , Models, Organizational , Workforce/organization & administration , Efficiency , Health Services Accessibility/organization & administration , Humans , Longitudinal Studies , Regression Analysis , United States , United States Department of Veterans Affairs
5.
Am Psychol ; 76(1): 26-38, 2021 Jan.
Article in English | MEDLINE | ID: mdl-33119331

ABSTRACT

The coronavirus disease 2019 (COVID-19) pandemic has increased the need for psychological care in the global population and has created new barriers to accessing services. Hospitals, mental health facilities, and other clinics face the challenge of providing continued care to a population that is under severe stress, while minimizing in-person visits that risk spreading the virus. The Veterans Health Administration (VHA) is the largest integrated health care system in the United States, providing care at 1,286 sites. VHA ensured the continuity of mental health services after the COVID-19 outbreak by rapidly expanding its use of telemental health methods in the first weeks after the U.S. pandemic outbreak. VHA provided nearly 1.2 million telephone and video encounters to veterans in April 2020 and reduced in-person visits by approximately 80% when compared with the October 2019 to February 2020 period before the pandemic. By June 2020, VHA had an 11-fold increase in encounters using direct-to-home video and a fivefold increase in telephone contacts relative to before the pandemic. This article discusses research on the effectiveness of telemental health, VHA policies before COVID-19 that facilitated the use of telemental health systemwide, and VHA's actions that rapidly scaled use of telemental health during the first months of the outbreak. Key challenges and lessons learned from VHA's experience and implications for providers and health care systems regarding the use of telemental health to meet patients' mental health care needs during the pandemic are also discussed. (PsycInfo Database Record (c) 2021 APA, all rights reserved).


Subject(s)
COVID-19 , Continuity of Patient Care/organization & administration , Mental Health Services/organization & administration , Process Assessment, Health Care , Telemedicine/organization & administration , United States Department of Veterans Affairs/organization & administration , Health Services Research , Humans , United States , Veterans
7.
J Thorac Dis ; 11(9): 3696-3703, 2019 Sep.
Article in English | MEDLINE | ID: mdl-31656641

ABSTRACT

Lung cancer remains the leading cause of cancer-related deaths in southern Africa. Early trials of chest radiograph-based screening in males at high risk for lung cancer found no mortality benefit of a radiograph alone, or a radiograph plus sputum cytology screening strategy. Large prospective studies, including the National Lung Screening Trial, have shown an all-cause mortality benefit when low-dose computed tomography (LDCT) was used as a screening modality in patients that are at high risk of developing lung cancer. The South African Thoracic Society, based on these findings, and those from several international guidelines, recommend that annual LDCT should be offered to patients between 55-74 years of age who are current or former smokers (having quit within the preceding 15 years), with at least a 30-pack year smoking history and with no history of lung cancer. Patients should be in general good health, fit for surgery, and willing to undergo further investigations if deemed necessary. Given the high local prevalence of tuberculosis (TB) infection and post-TB lung disease, which can radiographically mimic lung cancer, a conservative threshold (nodule size ≥6 mm) should be used to determine whether the baseline LDCT screen is positive (thus nodules <6 mm require no action until the next annual screen). If a non-calcified, solid or partly solid nodule is ≥6 mm, but <10 mm with no malignant features (e.g., distinct spiculated margins), the LDCT should be repeated in 6 months. If a solid nodule or the largest component of a non-solid nodule is ≥10 or ≥6 mm and enlarging or with additional malignant features present, definitive action to exclude lung cancer is warranted. Patients should be screened annually until 15 years have elapsed from date of smoking cessation, they turn 80, become unfit for a curative operation or significant changes are observed.

9.
Psychiatr Serv ; 70(3): 168-175, 2019 03 01.
Article in English | MEDLINE | ID: mdl-30497325

ABSTRACT

OBJECTIVE: Mental health treatment access and quality are influenced by the interplay of structural, organizational, and performance factors-including the number of mental health staff providing direct clinical care relative to patients treated (i.e., staffing ratio), mental health staff productivity, and wait times for scheduled mental health appointments. With no industry standards to follow, the Veterans Health Administration (VHA) developed an outpatient mental health staffing model and a recommended minimum total staffing ratio. METHODS: At the level of VHA health care facility (N=140), we conducted cross-sectional regression analyses to examine the relative importance of outpatient mental health staffing and productivity and mental health patient wait times in predicting measures of mental health treatment access and quality. RESULTS: Outpatient mental health staffing ratios (especially total and therapist staffing ratios) had substantial, positive relationships with overall mental health treatment access and quality, broadly and in specific domains. Staffing ratios generally had stronger relationships with treatment access and quality than did staff productivity and patient wait times. CONCLUSIONS: Mental health staffing ratios should be a primary consideration when trying to improve mental health treatment access and quality at the facility level. Having more mental health staff of all types is associated with better overall access to and quality of mental health services, and multiple staff types are needed to provide high-quality mental health care. Knowledge gained may guide efforts to address challenges in improving access to and quality of mental health services within and outside of VHA.


Subject(s)
Health Personnel , Health Services Accessibility/standards , Mental Health Services/organization & administration , Veterans Health , Workforce , Cross-Sectional Studies , Humans , Mental Health Services/standards , Outpatients , Regression Analysis , Social Responsibility , United States , United States Department of Veterans Affairs
11.
Psychol Serv ; 15(4): 486-495, 2018 Nov.
Article in English | MEDLINE | ID: mdl-28714721

ABSTRACT

Achieving quality outcomes and cost efficiency within mental health are overarching objectives of the Veterans Health Administration (VHA). The mental health care workforce has long been oriented toward the goal of high quality outcomes; however, cost efficiency has only recently been elevated into this important value equation. With increased demand for access to mental health services within the VHA, leadership sought to advance methods of determining and improving mental health provider productivity. Monitoring of productivity data may also provide data signaling the potential need for additional staffing to keep up with demand for services. This article outlines VHA's development and specification of mental health productivity policy, implementation strategies, and a discussion of challenges and lessons learned for other systems to consider in implementing productivity monitoring. (PsycINFO Database Record (c) 2018 APA, all rights reserved).


Subject(s)
Burnout, Professional , Efficiency , Health Personnel , Mental Health Services , Morale , United States Department of Veterans Affairs , Adult , Humans , United States
13.
J Clin Psychol Med Settings ; 22(4): 232-42, 2015 Dec.
Article in English | MEDLINE | ID: mdl-26645090

ABSTRACT

With the expansion of integrated primary care and the increased focus on fiscal sustainability, it is critical for clinical managers of these innovative systems to have practical methods for measuring administrative outcomes. Administrative outcomes will assist leadership in the development of efficient, streamlined clinics to provide services to the primary care population. Additionally, administrative measures can be utilized to provide information to assist in guiding resource utilization and management decisions. Several administrative outcomes are suggested for integrated primary care managers to consider for application, including: clinic utilization measures, integrated care administrative measures, wait time and access metrics, and productivity monitors. Effective utilization of these measures can help office managers and clinic leadership not only to maximize patient care, but also to enhance essential business operations, which increase the long-term sustainability of integrated primary care programs.


Subject(s)
Delivery of Health Care, Integrated/organization & administration , Psychology, Clinical/organization & administration , Humans , Primary Health Care/organization & administration
14.
JAMA ; 312(2): 155-61, 2014 Jul.
Article in English | MEDLINE | ID: mdl-25005652

ABSTRACT

IMPORTANCE: Behavioral approaches and pharmacotherapy are of proven benefit in assisting smokers to quit, but it is unclear whether combining nicotine replacement therapy (NRT) with varenicline to improve abstinence is effective and safe. OBJECTIVE: To evaluate the efficacy and safety of combining varenicline and a nicotine patch vs varenicline alone in smoking cessation. DESIGN, SETTING, AND PARTICIPANTS: Randomized, blinded, placebo-controlled clinical trial with a 12-week treatment period and a further 12-week follow-up conducted in 7 centers in South Africa from April 2011 to October 2012. Four hundred forty-six generally healthy smokers were randomized (1:1); 435 were included in the efficacy and safety analyses. INTERVENTIONS: Nicotine or placebo patch treatment began 2 weeks before a target quit date (TQD) and continued for a further 12 weeks. Varenicline was begun 1 week prior to TQD, continued for a further 12 weeks, and tapered off during week 13. MAIN OUTCOMES AND MEASURES: Tobacco abstinence was established and confirmed by exhaled carbon monoxide measurements at TQD and at intervals thereafter up to 24 weeks. The primary end point was the 4-week exhaled carbon monoxide-confirmed continuous abstinence rate for weeks 9 through 12 of treatment, ie, the proportion of participants able to maintain complete abstinence from smoking for the last 4 weeks of treatment, as assessed using multiple imputation analysis. Secondary end points included point prevalence abstinence at 6 months, continuous abstinence rate from weeks 9 through 24, and adverse events. Multiple imputation also was used to address loss to follow-up. RESULTS: The combination treatment was associated with a higher continuous abstinence rate at 12 weeks (55.4% vs 40.9%; odds ratio [OR], 1.85; 95% CI, 1.19-2.89; P = .007) and 24 weeks (49.0% vs 32.6%; OR, 1.98; 95% CI, 1.25-3.14; P = .004) and point prevalence abstinence rate at 6 months (65.1% vs 46.7%; OR, 2.13; 95% CI, 1.32-3.43; P = .002). In the combination treatment group, there was a numerically greater incidence of nausea, sleep disturbance, skin reactions, constipation, and depression, with only skin reactions reaching statistical significance (14.4% vs 7.8%; P = .03); the varenicline-alone group experienced more abnormal dreams and headaches. CONCLUSIONS AND RELEVANCE: Varenicline in combination with NRT was more effective than varenicline alone at achieving tobacco abstinence at 12 weeks (end of treatment) and at 6 months. Further studies are needed to assess long-term efficacy and safety. TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT01444131.


Subject(s)
Benzazepines/therapeutic use , Cholinergic Agents/administration & dosage , Nicotine/administration & dosage , Quinoxalines/therapeutic use , Smoking Cessation/methods , Tobacco Use Disorder/drug therapy , Adult , Benzazepines/adverse effects , Breath Tests , Carbon Monoxide/analysis , Cholinergic Agents/adverse effects , Double-Blind Method , Drug Therapy, Combination , Female , Humans , Male , Middle Aged , Nicotine/adverse effects , Quinoxalines/adverse effects , Tobacco Use Cessation Devices , Treatment Outcome , Varenicline
15.
J Pharm Sci ; 103(6): 1664-72, 2014 Jun.
Article in English | MEDLINE | ID: mdl-24652662

ABSTRACT

The purpose of this study is to identify critical physicochemical properties of hydroxypxropyl methylcellulose (HPMC) that impact the dissolution of a controlled release tablet and develop a strategy to mitigate the HPMC lot-to-lot and vendor-to-vendor variability. A screening experiment was performed to evaluate the impacts of methoxy/hydroxypropyl substitutions, and viscosity on drug release. The chemical diversity of HPMC was explored by nuclear magnetic resonance (NMR), and the erosion rate of HPMC was investigated using various dissolution apparatuses. Statistical evaluation suggested that the hydroxypropyl content was the primary factor impacting the drug release. However, the statistical model prediction was not robust. NMR experiments suggested the existence of structural diversity of HPMC between lots and more significantly between vendors. Review of drug release from hydrophilic matrices indicated that erosion is a key aspect for both poorly soluble and soluble drugs. An erosion rate method was then developed, which enabled the establishment of a robust model and a meaningful HPMC specification. The study revealed that the overall substitution level is not the unique parameter that dictates its release-controlling properties. Fundamental principles of polymer chemistry and dissolution mechanisms are important in the development and manufacturing of hydrophilic matrices with consistent dissolution performance.


Subject(s)
Delayed-Action Preparations , Hypromellose Derivatives/chemistry , Chromatography, High Pressure Liquid , Hydrophobic and Hydrophilic Interactions , Magnetic Resonance Spectroscopy , Solubility , Tablets
16.
Neuron ; 78(4): 644-57, 2013 May 22.
Article in English | MEDLINE | ID: mdl-23719163

ABSTRACT

Neuregulin 1 (Nrg1) is a susceptibility gene of schizophrenia, a disabling mental illness that affects 1% of the general population. Here, we show that ctoNrg1 mice, which mimic high levels of NRG1 observed in forebrain regions of schizophrenic patients, exhibit behavioral deficits and hypofunction of glutamatergic and GABAergic pathways. Intriguingly, these deficits were diminished when NRG1 expression returned to normal in adult mice, suggesting that damage which occurred during development is recoverable. Conversely, increase of NRG1 in adulthood was sufficient to cause glutamatergic impairment and behavioral deficits. We found that the glutamatergic impairment by NRG1 overexpression required LIM domain kinase 1 (LIMK1), which was activated in mutant mice, identifying a pathological mechanism. These observations demonstrate that synaptic dysfunction and behavioral deficits in ctoNrg1 mice require continuous NRG1 abnormality in adulthood, suggesting that relevant schizophrenia may benefit from therapeutic intervention to restore NRG1 signaling.


Subject(s)
Glutamic Acid/metabolism , Neuregulin-1/metabolism , Prosencephalon/metabolism , Schizophrenia/genetics , Synaptic Transmission/genetics , Age Factors , Animals , Disease Models, Animal , Female , Gene Expression Regulation/genetics , Gene Expression Regulation/physiology , Genetic Predisposition to Disease , Humans , Male , Mice , Mice, Inbred C57BL , Mice, Neurologic Mutants , Mice, Transgenic , Neuregulin-1/genetics , Neurons/metabolism , Prosencephalon/cytology , Prosencephalon/growth & development , Schizophrenia/metabolism , Synaptic Transmission/physiology , Tissue Distribution
17.
Am J Bot ; 99(7): e298-300, 2012 Jul.
Article in English | MEDLINE | ID: mdl-22739711

ABSTRACT

PREMISE OF THE STUDY: Novel microsatellite primers were developed for the native wildflower Ipomopsis aggregata to facilitate ongoing studies of the genetics of local adaptation and patterns of hybridization with closely related species within the genus. METHODS AND RESULTS: Thirteen primer sets were successfully developed and tested using populations from the Rocky Mountains of Colorado, USA. The primers amplified di-, tri-, and tetranucleotide repeats with 1-15 alleles per locus. All primers also amplified fragments with varying success in closely related Ipomopsis species and more distant members of the Polemoniaceae. CONCLUSIONS: The polymorphism levels observed across all loci suggest that these microsatellites may be useful for population genetic studies in Ipomopsis, as well as in studies of other related taxa in the Polemoniaceae.


Subject(s)
Magnoliopsida/genetics , Microsatellite Repeats , Colorado , DNA, Plant/genetics , Genetics, Population/methods , Hybridization, Genetic , Species Specificity
18.
J Foot Ankle Surg ; 51(3): 387-93, 2012.
Article in English | MEDLINE | ID: mdl-22366474

ABSTRACT

Charcot foot syndrome (Charcot neuroarthropathy affecting the foot), particularly in its latter stages, may pose a significant technical challenge to the surgeon. Because of the lack of anatomic consistency, preoperative planning with virtual and physical models of the foot could improve the chances of achieving a predictable intraoperative result. In this report, we describe the use of a novel, inexpensive, 3-dimensional template printing technique that can provide, with just a normal printer, multiple "copies" of the foot to be repaired. Although we depict this method as it pertains to repair of the Charcot foot, it could also be used to plan and practice, or revise, 3-dimensional surgical manipulations of other complex foot deformities.


Subject(s)
Arthropathy, Neurogenic/surgery , Computer Simulation , Foot Deformities, Acquired/surgery , Image Processing, Computer-Assisted/methods , Imaging, Three-Dimensional , Plastic Surgery Procedures/methods , Surgery, Computer-Assisted/methods , Arthropathy, Neurogenic/complications , Arthropathy, Neurogenic/diagnostic imaging , Foot Deformities, Acquired/diagnostic imaging , Foot Deformities, Acquired/etiology , Humans , Radiography
19.
J Clin Exp Neuropsychol ; 33(8): 853-63, 2011 Oct.
Article in English | MEDLINE | ID: mdl-21950512

ABSTRACT

Use of neuropsychological tests to identify HIV-associated neurocognitive dysfunction must involve normative standards that are well suited to the population of interest. Norms should be based on a population of HIV-uninfected individuals as closely matched to the HIV-infected group as possible and must include examination of the potential effects of demographic factors on test performance. This is the first study to determine the normal range of scores on measures of psychomotor speed and executive function among a large group of ethnically and educationally diverse HIV-uninfected, high-risk women, as well as their HIV-infected counterparts. Participants (n = 1,653) were administered the Trail Making Test Parts A and B (Trails A and Trails B), the Symbol Digit Modalities Test (SDMT), and the Wide Range Achievement Test-3 (WRAT-3). Among HIV-uninfected women, race/ethnicity accounted for almost 5% of the variance in cognitive test performance. The proportions ofvariance in cognitive test performance accounted for by age (13.8%), years of school (4.1%), and WRAT-3 score (11.5%) were each significant, but did not completely account for the effect of race (3%). HIV-infected women obtained lower scores than HIV-uninfected women on time to complete Trails A and B, SDMT total correct, and SDMT incidental recall score, but after adjustment for age, years of education, racial/ethnic classification, and reading level, only the difference on SDMT total correct remained significant. Results highlight the need to adjust for demographic variables when diagnosing cognitive impairment in HIV-infected women. Advantages of demographically adjusted regression equations developed using data from HIV-uninfected women are discussed.


Subject(s)
Aging , Cognition Disorders/complications , Educational Status , Executive Function/physiology , HIV Infections , Reading , Adult , Analysis of Variance , Ethnicity , Female , HIV Infections/complications , HIV Infections/ethnology , HIV Infections/psychology , Health Surveys , Humans , Middle Aged , Neuropsychological Tests , Predictive Value of Tests , Prospective Studies , Retrospective Studies , Young Adult
20.
J Clin Exp Neuropsychol ; 33(3): 283-91, 2011 Mar.
Article in English | MEDLINE | ID: mdl-20924914

ABSTRACT

Dimensional structures underlying the Wechsler Memory Scale-Fourth Edition (WMS-IV) and Wechsler Memory Scale-Third Edition (WMS-III) were compared to determine whether the revised measure has a more coherent and clinically relevant factor structure. Principal component analyses were conducted in normative samples reported in the respective technical manuals. Empirically supported procedures guided retention of dimensions. An invariant two-dimensional WMS-IV structure reflecting constructs of auditory learning/memory and visual attention/memory (C1 = .97; C2 = .96) is more theoretically coherent than the replicable, heterogeneous WMS-III dimension (C1 = .97). This research suggests that the WMS-IV may have greater utility in identifying lateralized memory dysfunction.


Subject(s)
Learning/physiology , Memory/physiology , Visual Perception/physiology , Wechsler Scales , Adolescent , Adult , Age Factors , Aged , Attention/physiology , Factor Analysis, Statistical , Female , Humans , Male , Middle Aged , Neuropsychological Tests , Reference Values , Statistics as Topic , Young Adult
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