Juan Manuel Vilar Fernández
University of A Coruña
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Featured researches published by Juan Manuel Vilar Fernández.
Test | 2002
Juan Manuel Vilar Fernández; Mario Francisco Fernández
Consider the fixed regression model with random observation error that follows an AR(1) correlation structure. In this paper, we study the nonparametric estimation of the regression function and its derivatives using a modified version of estimators obtained by weighted local polynomial fitting. The asymptotic properties of the proposed estimators are studied: expressions for the bias and the variance/covariance matrix of the estimators are obtained and the joint asymptotic normality is established. In a simulation study, a better behavior of the Mean Integrated Squared Error of the proposed regression estimator with respect to that of the classical local polynomial estimator is observed when the correlation of the observations is large.Consider the fixed regression model with random observation error that follows an AR(1) correlation structure. In this paper, we study the nonparametric estimation of the regression function and its derivatives using a modified version of estimators obtained by weighted local polynomial fitting. The asymptotic properties of the proposed estimators are studied: expressions for the bias and the variance/covariance matrix of the estimators are obtained and the joint asymptotic normality is established. In a simulation study, a better behavior of the Mean Integrated Squared Error of the proposed regression estimator with respect to that of the classical local polynomial estimator is observed when the correlation of the observations is large.
Dermatologic Therapy | 2016
Daniel López López; Juan Manuel Vilar Fernández; Marta Elena Losa Iglesias; Carlos Álvarez Castro; Carlos Romero Morales; María Matilde García Sánchez; Ricardo Becerro de Bengoa Vallejo
The aim of our study was to evaluate the efficacy and safety of topical cantharidin–podophylotoxin–salicylic acid (CPS) treatment of recalcitrant plantar warts (RPW). This study was carried out in a health center in the city of A Coruña (Spain) between January and December 2013. A total of 75 patients completed all the stages of the research process. Information related to treatment with CPS and adverse effects was abstracted from medical records. Of 93 potential patients identified, 75 had at least one follow‐up visit or telephone call after treatment and were included in this study. Patients experienced an average of 5.4 visits until complete resolution of their plantar wart occurred, although CPS was not applied at every visit. Fifty‐four patients required one application to eliminate the wart and 21 patients required two applications/patient. Seventy‐seven percent of patients experienced blistering – an expected therapeutic side effect. All patients experienced some form of an adverse event, the most common being pain (81.3%) and significant blistering (15%). Other side effects were rare (18.7%) and included pruritus, possible mild infection, significant irritation, and bleeding. All patients reported treatment, supporting our results that CPS is a safe and efficacious treatment modality for RPW and should be considered when symptomatic infection necessitates treatment.
Journal of Pain Research | 2017
César Calvo-Lobo; Juan Manuel Vilar Fernández; Ricardo Becerro-de-Bengoa-Vallejo; Marta Elena Losa-Iglesias; David Rodríguez-Sanz; Patricia Palomo López; Daniel López López
Background and purpose Nonspecific low back pain (LBP) is the most prevalent musculoskeletal condition in various age ranges and is associated with depression. The aim of this study was to determine the Beck Depression Inventory (BDI) scores in participants with nonspecific LBP and no-pain by age distribution. Methods A case–control study was carried out following the Strengthening the Reporting of Observational Studies in Epidemiology criteria. A sample of 332 participants, divided into the following age categories: 19–24 (n=11), 25–39 (n=66), 40–64 (n=90), 65–79 (n=124), and ≥80 (n=41) years was recruited from domiciliary visits and an outpatient clinic. The BDI scores were self-reported in participants with nonspecific acute or subacute (≤3 months) LBP (n=166) and no-pain (n=166). Results The BDI scores, mean ± standard deviation, showed statistically significant differences (p<0.001) between participants with nonspecific acute or subacute LBP (9.590±6.370) and no-pain (5.825±5.113). Significantly higher BDI scores were obtained from participants with nonspecific acute and subacute LBP in those aged 40–64 years (p<0.001; 9.140±6.074 vs 4.700±3.777) and 65–79 years (p<0.001; 10.672±6.126 vs 6.210±5.052). Differences were not significant in younger patients aged 19–24 (p=0.494; 5.000±2.646 vs 8.250±7.498), 25–39 (p=0.138; 5.440±5.245 vs 3.634±4.397), and in those aged ≥80 years (p=0.094; 13.625±6.1331 vs 10.440±5.591). Conclusion Participants with nonspecific acute and subacute LBP present higher BDI depression scores, influenced by age distribution. Specifically, patients in the age range from 40 to 80 years with LBP could require more psychological care in addition to any medical or physical therapy. Nevertheless, physical factors, different outcomes, and larger sample size should be considered in future studies.
International Journal of Mental Health Nursing | 2016
Daniel López López; Juan Manuel Vilar Fernández; Marta Elena Losa Iglesias; Carlos Álvarez Castro; César Calvo Lobo; José Ramos Galván; Ricardo Becerro de Bengoa Vallejo
Hallux valgus (HV) is a highly-prevalent forefoot deformity associated with progressive subluxation and osteoarthritis of the first metatarsophalangeal joint; it is believed to be associated with depression. The aim of the present study was to determine the association of patients with varying degrees of HV involvement to depression using the Beck Depression Inventory (BDI). The sample consisted of 102 participants (mean age: 45.1 ± 1.6), who attended an outpatient centre where self-report data were recorded. The degree of HV deformity was determined in both feet, and the scores on the BDI were compared. A total of 38.24% of the sample had depression, with an average BDI score of 10.55 ± 12.36 points. There was a statistically-significant association between the degree and presence of HV in both feet (P = 0.0001). People with a greater degree of HV deformity in any foot also have a significant increase in depression based on BDI scores, regardless of sex.
Archive | 1998
Ricardo Cao Abad; Mario Francisco Fernández; Salvador Naya Fernández; Manuel A. Presedo Quindimil; Margarita Vázquez Brage; José Antonio Vilar Fernández; Juan Manuel Vilar Fernández
Revista de Investigación en Educación | 2013
Rosa María González Seijas; Silvia López Larrosa; Juan Manuel Vilar Fernández; Alfredo Rodríguez López-Vázquez
Test | 1992
Alejandro Quintela-del-Río; Juan Manuel Vilar Fernández
Archive | 2001
Ricardo Cao; Mario Francisco Fernández; Salvador Naya; Manuel A. Presedo Quindimil; Margarita Vázquez Brage; José A. Vilar; Juan Manuel Vilar Fernández
Archive | 2017
Daniel López López; Juan Manuel Vilar Fernández; César Calvo Lobo; Marta Elena Losa Iglesias; David Rodríguez Sanz; Ricardo Becerro de Bengoa Vallejo
Revista Latinoamericana de Metalurgia y Materiales | 2014
Otto Soto; Johana Carrero; Edgar González; María Luisa Fernández Sánchez; Eddy Nuñez; Juan Manuel Vilar Fernández