141 research outputs found
Dependencia funcional, deterioro cognitivo y características de la marcha en adultos mayores con enfermedades crónicas
Objetivo: Identificar el nivel y relación de dependencia funcional (DF), deterioro cognitivo (DC) y características de la marcha en adultos mayores (AM) con enfermedades crónicas, habitantes del área metropolitana de Saltillo, Coahuila.
Método: Diseño descriptivo correlacional. Muestra constituida por 105 AM de 60 años o más, usuarios de los Centros de Atención e Integración Familiar (CAIF). El tamaño de la muestra se determinó a través del paquete estadístico nQuery Advisor 7.0 considerando análisis de correlación bivariada, nivel de significancia de 0.5 y potencia del 95%. El muestreo fue por conveniencia. La recolección de datos se realizó a través de una cédula de datos socio-demográficas conjuntamente con cuatro instrumentos: para DF 1. Actividades Básicas de la Vida Diaria (AVD) y 2. Actividades Instrumentales de la Vida Diaria (AIVD); para DC 3. Mini Mental State Examination MMS-E; para las características de la marcha, 4. Sistema para Análisis de Marcha GaitRite ©, alphas de 0.730, 0.765, 0.720 y 0.811, respectivamente.
Resultados. La edad promedio de los AM participantes es de 75 años (X = 75 ± 6) y escolaridad de 5 años (X = 5 ± 3). La mayor parte son mujeres (81.9%); que viven sin pareja (74.3%) y reportan alguna enfermedad crónico-degenerativa (65%) como Diabetes, 32.4%; Hipertensión, 61% y Enfermedades Articulares, 42%. La prevalencia de: dependencia severa en ABVD 5.7% y AIVD 21.9 %; DC 24 %; Los AM con mayor edad y menor escolaridad, reportan mayor grado de DC (r= .251; p<.05; r= -.259; p<.05, respectivamente) y dependencia para realizar ABVD (r=.297; p<.05) y AIVD (r=.351; p<.05); Por lo menos, el 30% de AM presentabó dificultades para mantener el equilibrio. Además, el 60% presentó dificultades para sentarse porque tienen problemas al medir la distancia entre su propio cuerpo y la silla, caen en la silla o se apoye en él con movimientos inseguros. 29% presentaba dificultades para elevar su pie derecho completamente.
Discusión y Conclusiones. Los resultados de este estudio confirman lo que la literatura reporta acerca de la prevalencia y asociación de DF, DC y presencia de enfermedades crónicas características del AM como Diabetes e Hipertensión. Es necesario profundizar en el análisis de este estudio incorporando mediciones acerca del tiempo de diagnóstico de la enfermedad crónica, co-morbilidad, síntomas de depresión y diferencias de género, entre otros aspectos. También los factores asociados a la problemática de la marcha. Para el profesional de Enfermería, la continuidad de este fenómeno de estudio, fortalecerá el cuerpo de conocimientos disciplinares y la atención a las complejas necesidades de cuidado a la salud que demanda este segmento de la población. Palabras Clave: Adulto Mayor, Dependencia Funcional, Deterioro Cognitivo, Marcha
Measurement of the Boson Mass
A measurement of the mass of the boson is presented based on a sample of
5982 decays observed in collisions at
= 1.8~TeV with the D\O\ detector during the 1992--1993 run. From a
fit to the transverse mass spectrum, combined with measurements of the
boson mass, the boson mass is measured to be .Comment: 12 pages, LaTex, style Revtex, including 3 postscript figures
(submitted to PRL
Search for First Generation Scalar Leptoquark Pairs in ppbar Collisions at sqrt(s)=1.8 TeV
We have searched for first generation scalar leptoquark (LQ) pairs in the
enu+jets channel using ppbar collider data (integrated luminosity= 115 pb^-1)
collected by the DZero experiment at the Fermilab Tevatron during 1992-96. The
analysis yields no candidate events. We combine the results with those from the
ee+jets and nunu+jets channels to obtain 95% confidence level (CL) upper limits
on the LQ pair production cross section as a function of mass and of beta, the
branching fraction to a charged lepton. Comparing with the next-to-leading
order theory, we set 95% CL lower limits on the LQ mass of 225, 204, and 79
GeV/c^2 for beta=1, 1/2, and 0, respectively.Comment: 14 pages, 4 figures, submitted to Physical Review Letters Replaced to
correct visitor addresse
Measurement of the Top Quark Mass Using Dilepton Events
The D0 collaboration has performed a measurement of the top quark mass based
on six candidate events for the process t tbar -> b W+ bbar W-, where the W
bosons decay to e nu or mu nu. This sample was collected during an exposure of
the D0 detector to an integrated luminosity of 125 pb^-1 of sqrt(s)=1.8 TeV
p-pbar collisions. We obtain mt = 168.4 +- 12.3 (stat) +- 3.7 (sys) GeV/c^2,
consistent with the measurement obtained using single-lepton events.
Combination of the single-lepton and dilepton results yields mt = 172.0 +- 7.5
GeV/c^2.Comment: 12 pages, 3 figure
Search for Top Squark Pair Production in the Dielectron Channel
This report describes the first search for top squark pair production in the
channel stop_1 stopbar_1 -> b bbar chargino_1 chargino_1 -> ee+jets+MEt using
74.9 +- 8.9 pb^-1 of data collected using the D0 detector. A 95% confidence
level upper limit on sigma*B is presented. The limit is above the theoretical
expectation for sigma*B for this process, but does show the sensitivity of the
current D0 data set to a particular topology for new physics.Comment: Five pages, including three figures, submitted to PRD Brief Report
Direct Measurement of the Top Quark Mass at D0
We determine the top quark mass m_t using t-tbar pairs produced in the D0
detector by \sqrt{s} = 1.8 TeV p-pbar collisions in a 125 pb^-1 exposure at the
Fermilab Tevatron. We make a two constraint fit to m_t in t-tbar -> b W^+bbar
W^- final states with one W boson decaying to q-qbar and the other to e-nu or
mu-nu. Likelihood fits to the data yield m_t(l+jets) = 173.3 +- 5.6 (stat) +-
5.5 (syst) GeV/c^2. When this result is combined with an analysis of events in
which both W bosons decay into leptons, we obtain m_t = 172.1 +- 5.2 (stat) +-
4.9 (syst) GeV/c^2. An alternate analysis, using three constraint fits to fixed
top quark masses, gives m_t(l+jets) = 176.0 +- 7.9 (stat) +- 4.8 (syst)
GeV/C^2, consistent with the above result. Studies of kinematic distributions
of the top quark candidates are also presented.Comment: 43 pages, 53 figures, 33 tables. RevTeX. Submitted to Phys. Rev.
Search for Squarks and Gluinos in Events Containing Jets and a Large Imbalance in Transverse Energy
Using data corresponding to an integrated luminosity of 79 pb-1, D0 has
searched for events containing multiple jets and large missing transverse
energy in pbar-p collisions at sqrt(s)=1.8 TeV at the Fermilab Tevatron
collider. Observing no significant excess beyond what is expected from the
standard model, we set limits on the masses of squarks and gluinos and on the
model parameters m_0 and m_1/2, in the framework of the minimal low-energy
supergravity models of supersymmetry. For tan(beta) = 2 and A_0 = 0, with mu <
0, we exclude all models with m_squark < 250 GeV/c^2. For models with equal
squark and gluino masses, we exclude m < 260 GeV/c^2.Comment: 10 pages, 3 figures, Submitted to PRL, Fixed typo on page bottom of
p. 6 (QCD multijet background is 35.4 events
Measurement of Dijet Angular Distributions and Search for Quark Compositeness
We have measured the dijet angular distribution in =1.8 TeV
collisions using the D0 detector. Order QCD
predictions are in good agreement with the data. At 95% confidence the data
exclude models of quark compositeness in which the contact interaction scale is
below 2 TeV.Comment: 11 pages, Latex, 3 postscript figure
Search for Charge 1/3 Third Generation Leptoquarks in pbarp Collisions at sqrt(s)=1.8 TeV
We report on a search for charge 1/3 third generation leptoquarks (LQ)
produced in pbarp collisions at sqrt(s) = 1.8 TeV using the D0 detector at
Fermilab. Third generation leptoquarks are assumed to be produced in pairs and
to decay to a tau neutrino and a b quark with branching fraction B. We place
upper limits on sigma(pbarp to LQbarLQ)xB^2 as a function of the leptoquark
mass M_LQ. Assuming B =1, we exclude at the 95% confidence level third
generation scalar leptoquarks with M_LQ<94 GeV/c^2, and third generation vector
leptoquarks with M_LQ<216 GeV/c^2 (M_LQ<148 GeV/c^2) assuming Yang-Mills
(anomalous) coupling.Comment: 6 pages, 3 figure
Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay
We report on a search for pair production of a fourth generation charge -1/3
quark (b') in pbar p collisions at sqrt(s) = 1.8 TeV at the Fermilab Tevatron
using an integrated luminosity of 93 pb^-1. Both quarks are assumed to decay
via flavor changing neutral currents (FCNC). The search uses the signatures
gamma + 3 jets + mu-tag and 2 gamma + 2 jets. We see no significant excess of
events over the expected background. We place an upper limit on the production
cross section times branching fraction that is well below theoretical
expectations for a b' quark decaying exclusively via FCNC for b' quark masses
up to m(Z) + m(b).Comment: Eleven pages, two postscript figures, submitted to Physical Review
Letter
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