longitudinal


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lon·gi·tu·di·nal

(lon'ji-tū'di-năl), [TA]
1. Running lengthwise; in the direction of the long axis of the body or any of its parts. Synonym(s): longitudinalis [TA]
2. Studied over a period of time, diachronic; contrast with cross-sectional or synchronic, which give equivalent results only under certain strict conditions of stability and equilibrium. Such strict attention to these conditions is of the greatest importance in the study of survivorship either in demographics or in cell economy (for example, survival pattern of erythrocytes and platelets).
[L. longitudo, length]
Farlex Partner Medical Dictionary © Farlex 2012

lon·gi·tu·di·nal

(lon'ji-tū'di-năl) [TA]
1. Running lengthwise; in the direction of the long axis of the body or any of its parts.
2. Data studied over a period of time, diachronic; contrast with cross-sectional or synchronic, which give equivalent results only under certain strict conditions of stability and equilibrium.
[L. longitudo, length]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

longitudinal

(lŏn″jĭ-tood′ĭ-năl, ĭ-tū′) [L. longitudo, length]
1. Parallel to the long axis of the body or part.
2. Continuing or lasting for some time. A longitudinal study follows its subjects from month to month or year to year
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
(2) The ballast longitudinal resistance performance after dynamic reciprocated loading and its evolution law were investigated.
For example, when any morphing does not occur, one of longitudinal derivative [X.sub.u] is
Longitudinal data can be structured as either multivariate or univariate data.
(13), heat productions of longitudinal and torsional phacoemulsification were compared.
Dentre as vantagens vinculadas a utilizacao do delineamento longitudinal misto esta a estimacao da magnitude dos efeitos da idade, coorte e periodo de medicao/avaliacao na analise da mudanca intraindividual e diferencas entre os sujeitos (Van Mechelen e Mellenberg, 1997).
Growth demands change and that is most effective when aided by longitudinal thinking.
During its client meeting, organised at the Millennium Seoul Hilton on 27th May, Bruno Sarfati, CSD CEO declared: "CSD launched the first longitudinal patient database over 17 years ago in France (Thales) and since then we have continued to extend our longitudinal patient data offer.
Readers of this journal know that longitudinal research involves the repeated measures of the same people over the course of time.
In a preliminary attempt to find a user-friendly technique for identifying at-risk students, a pilot longitudinal study was undertaken at Ithaca College using a convenient, 30 item, multiple-choice hardiness questionnaire (Bartone, 1991).
(1.) Nansel TR et al., The association of psychosocial stress and bacterial vaginosis in a longitudinal cohort, American Journal of Obstetrics and Gynecology, 2006, 194(2):381-386.
Improving the collection and use of education data and creating state longitudinal data systems to improve student achievement are among the biggest pushes of the Council of Chief State School Officers and the U.S.