The age-dependent divergence of strength and coordinating parameters among men and women: The cross-sectional studies

2010 ◽  
Vol 51 (3) ◽  
pp. e75-e78 ◽  
Author(s):  
Magdalena Wiacek ◽  
Igor Z. Zubrzycki
Keyword(s):  
Cross Sectional ◽  
Men And Women ◽  
Age Dependent ◽  
Cross Sectional Studies ◽  
The Cross

The General Health Questionnaire: how many items are really necessary in population surveys?

1995 ◽  
Vol 25 (5) ◽  
pp. 957-961 ◽  
Author(s):  
B. K. Jacobsen ◽  
T. Hasvold ◽  
G. Høyer ◽  
V. Hansen
Keyword(s):  
General Health ◽  
Mental Distress ◽  
General Health Questionnaire ◽  
Correlation Coefficients ◽  
The Arctic ◽  
Health Questionnaire ◽  
Population Surveys ◽  
Cross Sectional ◽  
Men And Women ◽  
Cross Sectional Studies

SYNOPSISThis paper seeks to investigate whether only a few questions selected from the General Health Questionnaire (GHQ) may be used to measure the degree of mental distress in population surveys. Data from 2112 men and women, 18 to 70 years old from two cross-sectional studies conducted in northern Norway and the island of Spitzbergen in the Arctic, were used. Correlation analysis of Likert scores from a 20-item version of GHQ (GHQ-20) with Likert scores based on four and six items selected by multiple regression analysis or by competent physicians was performed. The correlation coefficients between the scores from the subsets of four items and the full GHQ-20 questionnaire were high (greater than 0·80) in all examined subgroups of the populations. Increasing the number of questions from four to six only marginally increased the correlation coefficients. Thus, a simple linear sum of Likert scores based on a few GHQ items can be used to measure the degree of mental distress in population surveys.

scholarly journals Effects of high- and low-velocity resistance training on the contractile properties of skeletal muscle fibers from young and older humans

2011 ◽  
Vol 111 (4) ◽  
pp. 1021-1030 ◽  
Author(s):  
Dennis R. Claflin ◽  
Lisa M. Larkin ◽  
Paul S. Cederna ◽  
Jeffrey F. Horowitz ◽  
Neil B. Alexander ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Resistance Training ◽  
Cross Sectional Area ◽  
Contractile Properties ◽  
Sectional Area ◽  
Low Velocity ◽  
Cross Sectional ◽  
Men And Women ◽  
The Cross

A two-arm, prospective, randomized, controlled trial study was conducted to investigate the effects of movement velocity during progressive resistance training (PRT) on the size and contractile properties of individual fibers from human vastus lateralis muscles. The effects of age and sex were examined by a design that included 63 subjects organized into four groups: young (20–30 yr) men and women, and older (65–80 yr) men and women. In each group, one-half of the subjects underwent a traditional PRT protocol that involved shortening contractions at low velocities against high loads, while the other half performed a modified PRT protocol that involved contractions at 3.5 times higher velocity against reduced loads. Muscles were sampled by needle biopsy before and after the 14-wk PRT program, and functional tests were performed on permeabilized individual fiber segments isolated from the biopsies. We tested the hypothesis that, compared with low-velocity PRT, high-velocity PRT results in a greater increase in the cross-sectional area, force, and power of type 2 fibers. Both types of PRT increased the cross-sectional area, force, and power of type 2 fibers by 8–12%, independent of the sex or age of the subject. Contrary to our hypothesis, the velocity at which the PRT was performed did not affect the fiber-level outcomes substantially. We conclude that, compared with low-velocity PRT, resistance training performed at velocities up to 3.5 times higher against reduced loads is equally effective for eliciting an adaptive response in type 2 fibers from human skeletal muscle.

Longitudinal Assessment of Response Preparation and Evaluation in Migraine Gives Evidence for Deviant Maturation

Cephalalgia ◽  
2008 ◽  
Vol 28 (3) ◽  
pp. 237-249 ◽  
Author(s):  
R Oelkers-Ax ◽  
K Schmidt ◽  
S Bender ◽  
I Reimer ◽  
E Möhler ◽  
...  
Keyword(s):  
Sensory Processing ◽  
Contingent Negative Variation ◽  
Longitudinal Design ◽  
Longitudinal Assessment ◽  
Response Preparation ◽  
Cross Sectional ◽  
Dependent Development ◽  
Age Dependent ◽  
Cross Sectional Studies ◽  
Preparation And Evaluation

Evidence for deviant maturation of sensory processing in migraine has come recently from cross-sectional studies during childhood. Age-dependent development of response preparation and evaluation is characterized using a longitudinal design in school-aged migraine patients and controls in order to challenge the hypothesis of migraine as a maturation disorder. Forty-six children with migraine and 57 healthy controls aged 6-18 years were investigated and followed up 4 years later using a simple acoustic contingent negative variation (CNV) paradigm. Maturation in controls was characterized by increasing negativity of late and total CNV and stability of initial CNV (iCNV) and the motor postimperative negative variation (mPINV). Migraine patients showed a lack of development for late and total CNV and decreasing iCNV and mPINV negativity. This first longitudinal study confirms cross-sectional results of deviant CNV maturation in migraine. Altered maturation was not correlated with clinical improvement and may represent a vulnerability marker for migraine.

scholarly journals Observed correlations from cross-sectional individual differences research reflect both between-person and within-person correlations

2022 ◽  
Author(s):  
Shaw Hsu ◽  
Russell Poldrack ◽  
Nilam Ram ◽  
Anthony Wagner
Keyword(s):  
Individual Differences ◽  
Limited Attention ◽  
Confounding Effect ◽  
Cross Sectional ◽  
Cross Sectional Studies ◽  
The Cross

The study of individual differences is often conducted using cross-sectional experiments. The cross-sectional nature of such data means that results obtained from these experiments are a mix of both between- and within-person associations. While concerns about this within-between confounding effect have been surfaced, they are often not addressed when reporting results from individual differences studies. This obfuscation threatens the interpretability and validity of cross-sectional individual differences research. We speculate that a lack of a clear and accessible description of the confounding effect may have contributed to the limited attention to this issue. In this paper, we develop a tractable description of the confounding effect and how it manifests. In doing so, we suggest a need for greater transparency in the reporting of the goals and results of cross-sectional studies and how they contribute to knowledge of individual differences.

scholarly journals On the use of panel stationarity tests in convergence analysis: empirical evidence for the EU countries

Equilibrium ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. 77 ◽  
Author(s):  
Mariusz Próchniak ◽  
Bartosz Witkowski
Keyword(s):  
Gdp Per Capita ◽  
Stochastic Convergence ◽  
Cross Sectional ◽  
Eu Countries ◽  
Per Capita ◽  
Cross Sectional Studies ◽  
The Cross ◽  
The Impact ◽  
Panel Stationarity ◽  
The Eu

The study examines the concept of stochastic convergence in the EU28 countries over the 1994–2013 period. The convergence of individual countries’ GDP per capita towards the EU28 average per capita income level and the pair-wise convergence between the GDP of individual countries are both analyzed. Additionally, we introduce our own concept of conditional stochastic convergence which is based on adjusted GDP per capita series in order to account for the impact of other growth factors on GDP. The analysis is based on time series techniques. To assess stationarity, ADF tests are used. The study shows that the process of stochastic convergence in the EU countries is not as widespread as the cross-sectional studies on b or s convergence indicate. Even if we extend the analysis to examine conditional stochastic convergence, the number of converging economies or pairs of countries rises, but not as much as it could be expected from the cross-sectional studies.

scholarly journals Cross-sectional and prospective relationship between physical activity and depression symptoms

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Adilson Marques ◽  
Joana Bordado ◽  
Miguel Peralta ◽  
Elvio R. Gouveia ◽  
Riki Tesler ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vigorous Physical Activity ◽  
Depression Symptoms ◽  
Prospective Analysis ◽  
Cross Sectional ◽  
Men And Women ◽  
The Cross ◽  
D 12 ◽  
Item Scale

Abstract This study aimed to analyse the cross-sectional and prospective relationship between moderate and vigorous physical activity (PA) and depression symptoms. This study analysed 32,392 European late middle-aged to older adults, from 14 European countries across a 4-year follow-up. Data was collected in the fourth (in 2011) and sixth (in 2015) wave, from the Survey of Health, Ageing and Retirement in Europe (SHARE). For the present analysis, participants were considered who responded to the EURO-D 12-item scale of depression symptoms and reported the intensity and frequency of PA. ANCOVAs were conducted to assess the cross-sectional and prospective associations. For both men and women, engaging in moderate or vigorous PA in 2011 was associated with a lower score of depression in 2011 and 2015. From the prospective analysis, moderate and vigorous PA in 2011 was inversely associated with the score of depression. This association remains significant in the fully adjusted for self-rated health, sociodemographic characteristics, and the presence of chronic diseases. Moderate and vigorous PA at least once a week is negatively related to the score of depression, both in men and women. PA is negatively associated with depression symptoms, and from prospective analysis PA predicts lower depression scores 4 years later.

On the cross-sectional shape of the cellulose crystallites in the tunicate Halocynthia papillosa

1990 ◽  
Vol 48 (3) ◽  
pp. 566-567
Author(s):  
J.-F. Revol ◽  
Y. Van Daele ◽  
F. Gaill
Keyword(s):  
Contrast Imaging ◽  
Animal Kingdom ◽  
Bright Field ◽  
Field Mode ◽  
Cross Sectional ◽  
Ultrathin Sections ◽  
The Cross ◽  
Sectional Shape ◽  
Valonia Ventricosa ◽  
C Nmr

The only form of cellulose which could unequivocally be ascribed to the animal kingdom is the tunicin that occurs in the tests of the tunicates. Recently, high-resolution solid-state l3C NMR revealed that tunicin belongs to the Iβ form of cellulose as opposed to the Iα form found in Valonia and bacterial celluloses. The high perfection of the tunicin crystallites led us to study its crosssectional shape and to compare it with the shape of those in Valonia ventricosa (V.v.), the goal being to relate the cross-section of cellulose crystallites with the two allomorphs Iα and Iβ.In the present work the source of tunicin was the test of the ascidian Halocvnthia papillosa (H.p.). Diffraction contrast imaging in the bright field mode was applied on ultrathin sections of the V.v. cell wall and H.p. test with cellulose crystallites perpendicular to the plane of the sections. The electron microscope, a Philips 400T, was operated at 120 kV in a low intensity beam condition.

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